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TRW
TRW for Porsche
The highly professional TRW innovation team are completely focused on creating the most advanced Porsche products on the market, always engineered and tested to the highest possible standards. This means that we are able to deliver the most efficient, safe and durable Steering and Suspension products to you and to your customers.As one of the world’s largest aftermarket suppliers vital parts in OE-quality, we have a heritage that goes back one hundred years. With a wealth of diverse experience, we have fine-tuned our manufacturing processes and concentrated on satisfying customers much longer than most, so you can trust us to deliver, whether you need a simple car shock absorber or the latest cutting edge system for aftermarket steering parts
A Quick Look at TRW
TRW information on this page is based on details supplied by the manufacturer or distributor, plus any OE references provided with the parts.
Choosing the Right Fit for Your Porsche
Where TRW is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.
- Typical reasons to choose or replace TRW parts include refreshing worn suspension or steering joints, restoring braking performance, and addressing age-related wear without guesswork.
- Common real-world issues in this area include steering play, knocking over bumps, brake vibration, and uneven braking, often linked to worn ball joints or tie rods, seized calipers, old brake fluid, or incorrect installation torque.
- For safety-critical parts such as brakes and steering, watch for symptoms like pulling, vibration, or abnormal noises and investigate before they worsen.
- After any significant steering or suspension work, have the alignment checked and re-confirm torque settings after a short bedding-in period.
- When renewing left/right components such as dampers or control arms, replacing in pairs helps maintain balanced handling and predictable behaviour.
- Use service intervals and visible wear (perishing, leaks, excessive play) as cues for planning preventative replacement rather than waiting for a clear failure.
Browse by Category
If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.
Suspension & Axle — Suspension and axle components cover shocks, springs, arms, bushes, and joints that keep your Porsche stable, comfortable, and safe. Replacement is usually driven by wear, knocks over bumps, uneven tyre wear, or a general loss of ride and handling precision.
- After suspension work, plan for an alignment check and road test to confirm there is no remaining play or noise.
- Diagnose knocks and vibration carefully; multiple worn bushes or joints can contribute at once.
Ball Joints — Ball joints are safety-critical pivot points in the suspension that control steering precision and geometry. They are typically replaced when there is play, clunking, vague steering, or uneven tyre wear, restoring stability and confidence under braking and cornering.
- Check associated arms and bushes at the same time; fitting a new joint into a worn arm can be false economy.
- Plan on a wheel alignment after ball joint replacement to keep tyre wear and handling in check.
Shock Absorbers FRONT — Front shock absorbers are changed when damping fades, oil leaks appear, or the car feels floaty, unstable under braking, or unsettled over bumps. Choosing suitable front dampers helps bring back ride control, braking stability, and steering feel on your Porsche.
- Replace front shocks in left/right pairs to avoid uneven behaviour and unpredictable grip under braking.
- Consider renewing top mounts and related hardware if there are noises or high mileage on the existing parts.
Porsche Standard — Standard front suspension options are ideal when you want to retain the original Porsche balance of comfort and control. They are typically chosen during refresh work to keep the car close to factory behaviour rather than moving to a firmer or more focused setup.
- If chasing knocks or poor ride, inspect the full suspension system; issues are not always limited to dampers alone.
- Match standard components with appropriate springs and mounts so the system works as designed.
Special Offer Parts — Special offer parts can help reduce costs when tackling known Porsche wear items or grouped maintenance jobs. They are often used for routine service components or common refresh work, provided the part numbers and fitment details match your specific model.
- Always confirm compatibility by model, year, and specification before buying offer items, as returns can be inconvenient once the car is apart.
- Use offers to plan batches of work—combining service items or wear components can save on repeated labour.
Explore TRW at Design911
View the current TRW range for Porsche at Design911, then filter by model and category to narrow down to the right parts.
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
The TRW 1st Oversize Inlet Valve Guide is a precision replacement cylinder-head component designed to support and correctly locate the inlet valve as it opens and closes.
Fits:- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Diagram Ref No 2A
The valve guide keeps the valve stem accurately aligned with the valve seat, allowing the inlet valve to move smoothly while maintaining the correct seating position when closed. Correct valve guidance is essential for maintaining cylinder compression, efficient combustion and reliable engine performance.
This 1st oversize version is intended for cylinder-head refurbishment where the valve-guide mounting bore has worn or has been machined beyond the dimensions suitable for a standard-size guide. The oversize outer diameter allows the correct interference fit to be restored during professional cylinder-head rebuilding.
What This Product Does:
- Supports and accurately guides the inlet valve stem.
- Keeps the valve correctly aligned with its valve seat.
- Controls excessive sideways movement of the valve.
- Helps the valve form an effective seal when closed.
- Supports correct cylinder compression.
- Helps maintain efficient intake airflow and combustion.
- Reduces abnormal wear on the valve stem and valve seat.
- Provides an oversize fit for cylinder heads requiring refurbishment.
- Helps restore correct valvetrain operation during an engine or cylinder-head rebuild.
As valve guides wear, they become less effective at locating the valve accurately against the valve seat. This can reduce the effectiveness of the combustion-chamber seal and adversely affect engine performance.
Symptoms Of Wear Or Failure:
A worn inlet valve guide may cause:
- Increased engine oil consumption.
- Blue or blue-grey exhaust smoke.
- Smoke after start-up or following periods of overrun.
- Excessive valve-stem movement or lateral play.
- Ticking or tapping noises from the cylinder head.
- Rough or unstable idle.
- Engine misfires.
- Reduced engine performance.
- Poor or uneven cylinder compression.
- Oil-fouled spark plugs.
- Carbon deposits around the inlet valve.
- Excessive valve-stem or valve-seat wear.
- Poor valve seating.
- Excessive valve-guide clearance found during engine inspection.
Some of these symptoms can also be caused by valve-stem seals, piston rings or other engine components, so correct diagnosis and measurement are important before replacement.
Why Replacement Matters:
Valve guides operate continuously whenever the engine is running and are subjected to friction, heat and rapid reciprocating valve movement. With age and mileage, clearance between the valve stem and guide can increase.
Excessive clearance allows the valve to move laterally rather than travelling accurately along its intended axis. This can prevent the valve from consistently contacting the valve seat correctly, compromising combustion-chamber sealing and accelerating wear of the valve, valve seat and surrounding cylinder-head components.
Worn inlet guides can also allow increased quantities of engine oil to pass down the valve stem into the intake port and combustion chamber, contributing to oil consumption, exhaust smoke and deposits.
Replacing worn guides helps to:
- Restore accurate valve alignment.
- Maintain correct valve seating.
- Reduce unwanted valve-stem movement.
- Support consistent compression.
- Control oil entering the combustion chamber.
- Protect new or reconditioned valves and valve seats.
- Restore reliable cylinder-head operation.
- Reduce the risk of more extensive cylinder-head damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410432152
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
The TRW 1st Oversize Exhaust Valve Guide is a precision replacement component designed for the cylinder head of Porsche 911 (993) models. The guide supports the exhaust valve stem and keeps the valve accurately aligned as it opens and closes, helping the valve seat correctly and maintain an effective combustion-chamber seal.
x6 Per Engine.
Price Is For Each.
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Diagram Ref No 2
This 1st oversize version is intended for cylinder-head rebuilding where the original valve-guide bore has become worn or has been machined and a standard-size guide can no longer achieve the correct interference fit. Reference specifications list the guide as 8 x 13.26 mm. It is supplied individually, with six exhaust guides required for a complete engine.
- Supports and accurately guides the exhaust valve stem.
- Keeps the valve correctly aligned with its valve seat.
- Reduces excessive sideways movement and valve-stem wobble.
- Helps maintain effective cylinder sealing and compression.
- Assists with transferring heat from the exhaust valve stem into the cylinder head.
- Reduces abnormal loading and wear on the valve stem and valve seat.
- Provides an oversize external fit for cylinder heads requiring a 1st oversize guide.
- Helps restore correct valvetrain operation during a cylinder-head rebuild.
Correct valve guidance is particularly important on the exhaust side because exhaust valves and guides operate under very high thermal loads. Excessive clearance can prevent the valve from locating consistently against its seat and accelerate wear elsewhere in the cylinder head.
Symptoms Of Wear Or Failure:
A worn exhaust valve guide may cause:
- Blue or blue-grey exhaust smoke caused by oil entering the combustion chamber.
- Increased engine oil consumption.
- Excessive valve-stem play when inspected.
- Ticking or tapping noises from the cylinder head.
- Rough or uneven idle.
- Reduced engine performance or power.
- Poor or inconsistent compression.
- Engine misfires.
- Poor valve seating.
- Accelerated exhaust valve or valve-seat wear.
- Failed compression or leak-down test results.
As valve guides wear, their ability to accurately locate the valve against its seat decreases, which can compromise sealing and engine performance.
Why Replacement Matters:
- Exhaust valve guides are continually exposed to heat, friction and rapid valve movement. Over time, wear can increase the clearance between the valve stem and guide, allowing the valve to move laterally rather than travelling accurately along its intended path.
- Excessive valve movement can lead to poor valve seating, reduced compression, increased oil consumption and accelerated wear of the valve stem and valve seat. If left unresolved, the resulting wear can contribute to more extensive and expensive cylinder-head damage.
- Replacing worn guides restores controlled valve movement, supports consistent valve seating and helps protect the valve, valve seat and cylinder head. A correctly fitted guide also contributes to reliable compression, efficient exhaust-gas flow and long-term engine durability.
- The 1st oversize specification is especially important during cylinder-head refurbishment where the original guide bore has worn or been machined beyond standard dimensions. Using the correctly sized oversize guide allows the required secure fit to be restored.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310432172
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
The TRW 1st Oversize Inlet Valve Guide is a precision replacement component for the cylinder head of Porsche 911 (993) models. The valve guide supports and accurately locates the inlet valve stem as the valve repeatedly opens and closes, keeping the valve correctly aligned with its seat.
x6 Per Engine.
Price Is For Each.
Fits:
Diagram Ref No 3
Correct valve guidance is essential for smooth valve operation, effective combustion-chamber sealing and long-term cylinder-head reliability. The first-oversize specification is intended primarily for cylinder-head rebuilding or refurbishment where the original valve-guide bore has worn or been machined and a standard-size guide no longer provides the required interference fit.
What This Product Does:
- Supports and accurately guides the inlet valve stem.
- Prevents excessive sideways movement or valve wobble.
- Keeps the valve correctly aligned with the valve seat.
- Promotes consistent valve seating and combustion-chamber sealing.
- Helps protect the valve stem, valve seat and cylinder head from accelerated wear.
- Provides an oversize external fit for cylinder heads requiring a first-oversize valve guide during refurbishment.
- Helps restore correct valvetrain operation during a professional cylinder-head rebuild.
Symptoms Of Wear Or Failure:
Worn valve guides can allow excessive movement between the valve stem and guide. Possible symptoms include:
- Increased engine oil consumption.
- Blue exhaust smoke, particularly after start-up or during deceleration.
- Excessive valve-stem movement or valve wobble.
- Ticking or increased valvetrain noise.
- Poor or inconsistent valve seating.
- Reduced compression in an affected cylinder.
- Rough idle, misfires or reduced engine performance.
- Oil-fouled spark plugs.
- Accelerated valve-stem or valve-seat wear.
- Excessive valve-guide clearance discovered during cylinder-head inspection or rebuilding.
As guide wear increases, the valve may no longer locate accurately against its seat, potentially reducing combustion efficiency and contributing to further valve and cylinder-head wear.
Why Replacement Matters:
- Valve guides operate under constant heat, friction and rapid reciprocating movement. Once clearance becomes excessive, the valve can move laterally rather than travelling accurately along its intended axis. This can compromise valve seating, increase oil consumption and place additional stress on the valve stem and seat.
- Leaving badly worn guides in service can contribute to damaged valve seats, worn valve stems, poor sealing and potentially more extensive cylinder-head repairs. Installing the correct replacement guide restores controlled valve movement and helps maintain reliable compression, efficient combustion and long-term engine durability.
- The 1st oversize version is particularly important during cylinder-head refurbishment where the guide mounting bore can no longer securely retain a standard-size guide. Correct sizing and professional machining allow the replacement guide to achieve the required fit within the cylinder head.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310432271
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 356C 1963-65
The TRW Valve Cotter Half is a replacement valve-spring retaining collet for selected classic Porsche engines.
Sold Each.
x2 Required Per Engine Valve.
- Porsche 356C / SC - 1963 to 1965
- Porsche 911 - 1965 to 1989
- Porsche 964 - 1989 to 1994
- Porsche 944 - 1982 to 1991
- Porsche 928 - 1978 to 1986
Diagram Ref No 16
Also known as a valve keeper, valve collet or valve lock, this small but critical component fits into the machined groove near the top of the valve stem and locks into the valve spring retainer.
Each valve requires two cotter halves. When installed together, the two halves form a tapered locking arrangement that secures the valve spring and spring retainer to the valve stem.
What This Product Does:
The valve cotter forms part of the cylinder-head valvetrain.
Its job is to mechanically lock the valve spring retainer to the valve stem.
The assembly typically consists of:
- Engine valve
- Valve spring
- Spring retainer
- Two valve cotter halves
When the valve spring is compressed during assembly, the two cotter halves are installed around the valve-stem groove.
As the spring compressor is released, the spring retainer presses against the tapered outside surface of the cotters and locks them securely into position.
This allows the spring to remain attached to the valve while the engine operates at high speed.
Symptoms Of Wear Or Failure:
Valve cotters usually do not produce gradual external symptoms in the same way as a bearing or seal.
Problems are most commonly discovered during cylinder-head inspection or after another valvetrain fault develops.
Possible warning signs include:
- Unusual valvetrain ticking
- Metallic noise from the cylinder head
- Valve spring retainer sitting incorrectly
- Visible cotter movement
- Uneven cotter seating
- Damaged valve-stem groove
- Cracked or chipped cotter
- Wear marks around the locking surfaces
- Spring retainer sitting at an abnormal angle
- Valve clearance changing unexpectedly
- Misfire following valvetrain damage
- Loss of compression
- Serious mechanical noise after a cotter releases
A correctly installed cotter should remain securely locked and should not visibly move relative to the spring retainer.
Why Replacement Matters:
A damaged valve cotter should never be ignored.
If the cotter loses its grip on the valve stem, the spring retainer can release.
This can allow the valve to drop into the cylinder.
Potential consequences include:
- Valve-to-piston contact
- Bent valve
- Damaged piston
- Broken valve guide
- Cylinder-head damage
- Combustion-chamber damage
- Severe engine failure
Because the possible consequences are so serious, questionable cotters should be replaced during cylinder-head service rather than reused.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110541700
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Restore reliable engine performance with this TRW Engine Cylinder Head Intake Valve, manufactured as a direct replacement. Produced to OE specifications, this intake valve precisely controls the flow of the air and fuel mixture into the combustion chamber, ensuring efficient combustion, smooth engine operation, and optimum performance.
Fits:- Porsche 912 1965-1968
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Diagram Ref No 10
Operating under constant heat, pressure, and repeated opening and closing cycles, intake valves are subject to gradual wear over time. Carbon build-up, stem wear, valve face erosion, or physical damage can prevent the valve from sealing correctly, reducing engine efficiency and performance. Replacing worn or damaged intake valves restores proper cylinder sealing and airflow, making this TRW component an excellent choice for routine maintenance, engine repairs, rebuilds, and Porsche restoration projects.
What This Product Does:
- Controls the intake of the air and fuel mixture into the combustion chamber.
- Maintains correct cylinder sealing during the combustion cycle.
- Supports efficient combustion and engine performance.
- Helps deliver smooth power and throttle response.
- Restores correct valve operation during engine rebuilds.
- Replaces worn, burnt, or damaged original intake valves.
- Provides an OE fit and dependable quality.
Symptoms Of Wear Or Failure:
- Loss of engine power.
- Rough or uneven idle.
- Reduced engine compression.
- Misfiring cylinders.
- Poor fuel economy.
- Excessive valve train noise.
- Burnt, pitted, or bent valve faces.
- Excessive oil consumption caused by valve-related wear.
Why Replacement Matters:
- The intake valve is a critical component of the engine's valve train, regulating the precise amount of air and fuel entering each cylinder while maintaining an effective seal throughout the combustion cycle. A worn, burnt, or damaged intake valve can reduce compression, lower engine performance, increase fuel consumption, and eventually lead to costly engine damage if left unresolved.
- Replacing the intake valve restores proper airflow, combustion efficiency, and reliable engine performance while helping to protect other valve train components from unnecessary wear. Manufactured as a direct replacement and produced to OE specifications, this TRW engine cylinder head intake valve provides the correct fit, dependable quality, and long-lasting durability, making it an ideal choice for Porsche maintenance, engine rebuilds, repairs, and restoration projects.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
61610540200
The product you are viewing cross references to these numbers
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
This TRW Brake Booster Without Brake Light Switch is a quality component designed to enhance braking performance by amplifying the force applied from the brake pedal to the braking system. Installed between the brake pedal and master cylinder, this vacuum-assisted unit ensures smooth, responsive braking while reducing the physical effort required by the driver.
Fits:
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Cayman 2.7L 981 2013-16Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
Diagram Ref No 4
What This Product Does:
- Amplifies braking force using vacuum assistance
- Reduces brake pedal effort for improved driver comfort
- Enhances braking response and control
- Maintains consistent and predictable pedal feel
- Supports safe and efficient braking performance
Symptoms Of Wear Or Failure:
- Hard or stiff brake pedal requiring excessive force
- Increased stopping distances
- Hissing noise when braking (indicating a vacuum leak)
- Engine idle fluctuations when pressing the brake pedal
- Inconsistent or reduced braking performance
Why Replacement Matters:
- Restores proper braking assistance and responsiveness
- Improves stopping power and driver control
- Prevents additional strain on braking system components
- Eliminates vacuum leaks that can affect engine performance
- Ensures safe braking, particularly in emergency situations
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99135512534
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
- Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
This TRW Brake Booster is a quality component designed to enhance braking performance by amplifying the force applied from the brake pedal to the braking system. Installed between the brake pedal and master cylinder, this vacuum-assisted unit reduces driver effort while delivering smooth, responsive braking.
Fits:
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
1KD - Rear Disc Brakes, 17 Inch Disc Diameter, Brake Caliper Painted Black
1LA - Front Disc Brakes, 17 Inch Disc Diameter, Brake Caliper Painted Black
1LE - Front Disc Brakes, 17 Inch Disc Diameter, Brake Caliper Painted Black
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
- Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
1KD - Disc Brakes In Rear
1LA - Disc Brakes In Front
1LE - Disc Brakes In Front
L0R - Right-Hand Drive
Diagram Ref No 4
What This Product Does:
- Amplifies braking force using vacuum assistance
- Reduces brake pedal effort for improved comfort and control
- Enhances braking responsiveness
- Maintains consistent pedal feel
- Supports safe and efficient braking performance
Symptoms Of Wear Or Failure:
- Hard or stiff brake pedal requiring excessive force
- Increased stopping distances
- Hissing noise when braking (indicating a vacuum leak)
- Engine idle changes when pressing the brake pedal
- Inconsistent or reduced braking performance
Why Replacement Matters:
- Restores proper braking assistance and responsiveness
- Improves stopping power and driver control
- Prevents additional strain on braking components
- Eliminates vacuum leaks that may affect engine performance
- Ensures safe braking, particularly in emergency situations
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B612107Q
The product you are viewing cross references to these numbers
- Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
- Porsche 971.2 Panamera 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 Sport Turismo 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S Sport Turismo 2.9L V6 2021-23
- Porsche 971.2 Panamera GTS 4.0L V8 2021-23
- Porsche 971.2 Panamera GTS Sport Turismo 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
The TRW Brake Booster is a quality component engineered to enhance braking performance by amplifying the force applied to the brake system. Positioned between the brake pedal and master cylinder, this vacuum-assisted unit reduces the physical effort required by the driver while ensuring smooth and responsive braking.
Fits:
- Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
1LV - Front Disc Brake, 20 Inch Disc Diameter Plus Brake Caliper Painted Yellow (PCCB)
- Porsche 971.2 Panamera 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 Sport Turismo 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S Sport Turismo 2.9L V6 2021-23
- Porsche 971.2 Panamera GTS 4.0L V8 2021-23
- Porsche 971.2 Panamera GTS Sport Turismo 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
1LQ - Front Disc Brake PCCB
1LX - Front Disc Brake, PCCB, High-Gloss Black
Diagram Ref No 7
What This Product Does:
- Amplifies braking force using vacuum assistance
- Reduces brake pedal effort for improved driving comfort
- Enhances braking response and control
- Maintains consistent pedal feel
- Supports safe and efficient braking performance
Symptoms Of Wear Or Failure:
- Hard or stiff brake pedal requiring excessive force
- Increased stopping distances Hissing sound when braking (caused by vacuum leaks)
- Engine idle fluctuations when pressing the brake pedal
- Inconsistent or reduced braking performance
Why Replacement Matters:
- Restores proper braking assistance and responsiveness
- Improves stopping power and driver control
- Prevents additional strain on other braking components
- Eliminates vacuum leaks that can affect engine operation
- Ensures safe braking, especially in emergency situations
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
971614106G
The product you are viewing cross references to these numbers
- Porsche 9YA Cayenne V6 3.0L Petrol (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe V6 3.0L Petrol (340Hp) 2019-23
- Porsche 9YA Cayenne S V6 2.9L Petrol (440Hp) 2018-23
- Porsche 9YA Cayenne Coupe S V6 2.9L Petrol (440Hp) 2019-23
- Porsche 9YA Cayenne GTS V8 4.0L Petrol (460Hp) 2020-23
- Porsche 9YA Cayenne Coupe GTS V8 4.0L Petrol (460Hp) 2021-23
- Porsche 9YA Cayenne Turbo V8 4.0L Petrol (550Hp) 2020-23
- Porsche 9YA Cayenne Coupe Turbo V8 4.0L Petrol (550Hp) 2019-23
- Porsche 9YA Cayenne Coupe Turbo GT V8 4.0L (640Hp) 2021-23
This TRW Brake Booster is a quality component designed to enhance braking efficiency by amplifying the force applied from the brake pedal to the braking system. Positioned between the brake pedal and master cylinder, this vacuum-assisted unit ensures smooth, responsive braking with reduced driver effort.
Fits:
- Porsche 9YA Cayenne V6 3.0L Petrol (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe V6 3.0L Petrol (340Hp) 2019-23
- Porsche 9YA Cayenne S V6 2.9L Petrol (440Hp) 2018-23
- Porsche 9YA Cayenne Coupe S V6 2.9L Petrol (440Hp) 2019-23
- Porsche 9YA Cayenne GTS V8 4.0L Petrol (460Hp) 2020-23
- Porsche 9YA Cayenne Coupe GTS V8 4.0L Petrol (460Hp) 2021-23
- Porsche 9YA Cayenne Turbo V8 4.0L Petrol (550Hp) 2020-23
- Porsche 9YA Cayenne Coupe Turbo V8 4.0L Petrol (550Hp) 2019-23
- Porsche 9YA Cayenne Coupe Turbo GT V8 4.0L (640Hp) 2021-23
1KK - Rear Brake Discs, Disc Diameter 20 Inches, Brake Caliper Painted Yellow (PCCB)
1KU - Rear Brake Discs, Disc Diameter 19 Inches, Black Brake Calipers
1KZ - Rear Disc Brakes, 18-Inch Disc Diameter, Brake Caliper Painted Black
2EU - Rear Disc Brakes, PCCB High-Gloss Black
2EV - Rear Disc Brakes, PSCB High-Gloss Black
Diagram Ref No 1
What This Product Does:
- Amplifies braking force using vacuum assistance
- Reduces the effort required to press the brake pedal
- Improves braking response and control
- Ensures consistent and predictable pedal feel
- Supports overall braking system efficiency and safety
Symptoms Of Wear Or Failure:
- Hard or stiff brake pedal requiring more force than usual
- Increased stopping distances
- Hissing noise when pressing the brake pedal (indicative of a vacuum leak)
- Engine idle fluctuations when braking
- Inconsistent or reduced braking performance
Why Replacement Matters:
- Restores proper braking assistance and driver control
- Improves stopping power and responsiveness
- Prevents additional strain on braking components
- Eliminates vacuum leaks that may affect engine performance
- Ensures safety, particularly during emergency braking situations
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9Y0612107E
The product you are viewing cross references to these numbers
- Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
This TRW Brake Booster is a component designed to enhance braking performance by increasing the force applied to the braking system. Fitted between the brake pedal and master cylinder, this vacuum-assisted unit reduces the effort required by the driver to achieve effective braking.
Fits:
- Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
- Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
Diagram Ref No 7
What This Product Does:
- Amplifies braking force using vacuum assistance
- Reduces pedal effort required by the driver
- Improves braking responsiveness and control
- Ensures consistent brake pedal feel
- Supports safe and efficient braking performance
Symptoms Of Wear Or Failure:
- Hard or stiff brake pedal requiring excessive force
- Increased stopping distance Hissing noise when pressing the brake pedal (vacuum leak)
- Engine idle changes when braking
- Brake warning lights or inconsistent braking feel
Why Replacement Matters:
- Restores proper braking assistance and reduces driver effort
- Improves stopping performance and response time
- Prevents strain on other braking components
- Eliminates vacuum leaks that can affect engine performance
- Ensures safe driving conditions, especially in emergency braking situations
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
971614106H
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
This Rear Brake Disc, Brake Pads & Wear Sensor Package is a complete rear braking service solution designed for select Porsche Cayenne 955 model. The kit includes all essential components required to restore safe, reliable, and factory-correct rear braking performance in one installation.
The package comprises a rear brake disc (rotor), a matched rear brake pad set, and a brake pad wear sensor, ensuring proper braking function, smooth pedal feel, and accurate wear monitoring. Each component is manufactured to specifications, guaranteeing correct fitment, compatibility, and long service life.
The brake disc provides an efficient friction surface with proper heat dissipation, while the brake pads are formulated for consistent stopping power, low noise, and stable performance under normal and heavy braking conditions. The included wear sensor restores the dashboard warning system, alerting the driver when pad replacement is required.
Ideal for routine maintenance or full rear brake replacement, this kit ensures balanced braking performance, reduced noise and vibration, and confidence-inspiring stopping power.
Fits:
What This Package Does:
- Restores full rear braking performance
- Provides smooth, consistent stopping power
- Reduces brake noise, vibration, and harshness
- Restores brake pad wear warning functionality
- Protects brake discs from damage caused by worn pads
Symptoms Of Brake Disc / Pad / Wear Sensor Failure:
- Squealing or screeching noises when braking
- Grinding or metallic noises (indicative of worn pads scraping the rotor)
- Brake dust buildup
- Reduced braking performance
- Dashboard wear warning light (triggered by sensor)
- Vibration or pulsation through the brake pedal
- Grooved, scored, or visibly worn rotor surface
- Blue discoloration (overheating)
- Reduced braking efficiency or “soft” feel
- Uneven pad wear
- Brake wear warning light on dashboard
- Inaccurate pad wear readings
- No wear alert even when pads are worn
Why Replacement Matters:
- Fresh brake pads and discs provide maximum friction and braking performance, which is essential for safe stopping distances, especially under load or high speeds.
- Worn brake pads can prematurely score and damage rotors. Replacing both together avoids costly follow-up repairs.
- New discs and pads reduce noise, vibration, and harshness (NVH), delivering a smooth pedal feel and stable stopping.
- The wear sensor ensures you receive timely alerts — replacing it maintains this system, preventing unsafe brake conditions.
Related reference numbers
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BRAKEKIT955.R.TRW
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT2 RS 2011-13
Brake pads set of 4 for one axle

CARS WITH CERAMIC DISC (PCCB)
Porsche 997.1 GT2
Porsche 997.2 GT2 RS
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99735194893
The product you are viewing cross references to these numbers
- Porsche 928S2 4.7L 1984-86
Fits:
Porsche 928 1983-86
A clutch that is engaged/disengaged via hydraulic fluid instead of a cable uses a Clutch Master and Clutch Slave Cylinder. When depressing the clutch pedal a lever is squeezed, forcing hydraulic fluid through hydraulic lines to a "slave cylinder" which houses a piston. The piston forces a push rod to engage or disengage the clutch. A clutch master cylinder that contains the hydraulic fluid sits on a support thar near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
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92811623719
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
Fits:
Porsche 95B Macan V4 2.0L
Porsche 95B.2 Macan V4 2.0L
Diagram reference No. 3
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95810960100
The product you are viewing cross references to these numbers
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
- Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
Fits:
Porsche 95B.2 Macan - 2022 Onwards
For cars with Option Code - 2EV
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
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95B61542
The product you are viewing cross references to these numbers
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
- Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
Fits:
Porsche 95B.2 Macan - 2022 Onwards
For cars with Option Code - 1KW
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
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95B61542
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