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Hydraulics
- 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 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95

Fits:
Porsche 928 1988-95
for hydraulic unit part # 928.355.755.04 / 928.355.755..05 / 928.355.755..06
Porsche 944 1985-91
for Engine F 94-JN400 604>> / F 95-JN100 622>> / F 94-JN421 058>>
Porsche 968 1992-95
Porsche 964 1989-94
Click 'Zoom in' for large parts diagram.
Diagram ref no 16
* Please check and match the part number of your relay in your car before ordering.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861893001
The product you are viewing cross references to these numbers
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94

Fits:
Porsche 944 ALL 1985-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95135530302
The product you are viewing cross references to these numbers
- 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 1978-1989 3.3L Turbo (930)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94

Fits:
Porsche 911 1978-89
Porsche 928 1987-86 (RHD cars ONLY)
Porsche 968 1992-95
Porsche 924 1980-85
Porsche 924S 1986-88
Porsche 944 1982-90
Click 'zoom in' for large parts diagram.
Diagram ref no 29.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
191611933F
The product you are viewing cross references to these numbers
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- 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

Fits:
Porsche 996 GT3 1999-05
Porsche 997 GT3 >>2008
Porsche 996 GT2 2001-05
Porsche 997.1 GT2
Porsche 997.2 GT2
This product supersedes Porsche's old part numbers:
- 99642337790
Click 'Zoom in' for large parts diagram.
Diagram ref no 15
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99642337792
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95

Fits:
For LHD cars
Porsche 924 1976-85
Porsche 924S 1986-88
Porsche 928 1978-95
Porsche 968 1992-95
Porsche 944 1982-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92842390800
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95

Fits:
Porsche 924 / 924 S 1976-88
Porsche 928 1982-95
Porsche 944 1982-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 33
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92842319100
The product you are viewing cross references to these numbers
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94

Fits:
Porsche 944 1990-91 LHD Cars
Porsche 968 1992-95 LHD Cars
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 bar near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94442314900
The product you are viewing cross references to these numbers
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94

Fits:
Porsche 944 1990-91 LHD Cars
Porsche 968 1992-95 LHD Cars
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 bar near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94442314900
The product you are viewing cross references to these numbers
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94

Fits:
Porsche 944 1990-91 RHD Cars
Porsche 968 1992-95 RHD Cars
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 bar near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94542314900
The product you are viewing cross references to these numbers
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94

Fits:
Porsche 944 1990-91 RHD Cars
Porsche 968 1992-95 RHD Cars
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 bar near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94542314900
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94

Fits:
for RHD Cars
Porsche 924 1980-85
Porsche 924S 1986-88
Porsche 944 1982-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94442321000
The product you are viewing cross references to these numbers
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988

Fits:
Porsche 964 Turbo 1991-94
Porsche 993 Turbo 1995-98
Porsche 996 Turbo / GT2 2001-05
Porsche 944 Turbo 1985-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 25
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311033751
The product you are viewing cross references to these numbers
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988

Fits:
Porsche 964 Turbo 1991-94
Porsche 993 Turbo 1995-98
Porsche 996 Turbo / GT2 2001-05
Porsche 944 Turbo 1985-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 25
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311033751
The product you are viewing cross references to these numbers
Porsche Hydraulic Systems & Components
Your Porsche’s performance and safety rely on more than just the engine and brakes — the hydraulic system plays a vital role in delivering stopping power, smooth gear changes, and ride comfort. At Design911, we stock a full range of genuine and high-quality replacement hydraulic parts, including:
Brake hoses & lines Brake servos / boosters ABS pumps & modules Clutch master & slave cylinders Reservoir tanks & fluid containers Pressure accumulators Air suspension levelling componentsWhy
Hydraulics Are Essential
Hydraulic components use fluid pressure to
multiply force and deliver precision control. In your Porsche, this means:
- Braking power – consistent, responsive stopping through hoses, servos, and ABS pumps
- Clutch control – smooth gear changes with accurate master/slave cylinder operation
- System reliability – fluid reservoirs and accumulators keep hydraulic circuits primed
- Comfort & handling – air suspension levelling maintains stability under varying loads
Without properly functioning hydraulics, your
vehicle’s safety, drivability, and performance are compromised.
Common
Faults & Warning Sign
Hydraulic parts wear out over time due to
heat, pressure, and age. Look out for these symptoms:
Brake Hoses
- Cracks, bulges, or fluid leaks along flexible lines
- Spongy brake pedal feel
- Uneven braking performance
Brake Servo / Booster
- Increased pedal effort required to stop the car
- Hissing sound from the servo area (vacuum leak)
- Poor braking response despite good pads/discs
ABS Pump / Module
- ABS warning light illuminated
- Pulsating brakes under normal conditions
- Loss of anti-lock function in emergencies
Clutch Master & Slave Cylinders
- Difficulty engaging gears
- Pedal sinking to the floor or not returning properly
- Fluid leaks around cylinders or reservoir
Reservoir Tanks
- Low fluid levels despite no obvious leak
- Cracks or discolouration in plastic tanks
- Contaminated or dirty hydraulic fluid
Pressure Accumulators
- Brakes feel hard or inconsistent
- Hydraulic pump running excessively
- Warning lights for brake pressure or suspension
Air Suspension Levelling
- Vehicle sits unevenly or drops overnight
- Harsh ride quality or knocking sounds
- Dashboard suspension/ride height warnings
Why Replace
Worn Hydraulic Parts
- Safety first – faulty hydraulics can lead to total brake or clutch failure
- Performance – maintain the sharp response Porsche is known for
- Preventative maintenance – replacing hoses, cylinders, and pumps early avoids costly damage to other systems
- Comfort & control – ensure smooth ride height adjustment and braking stability
Design911 stocks OEM and performance hydraulic components for every Porsche model. Whether you need a simple brake hose replacement or a complete ABS pump, our range ensures your Porsche remains safe, responsive, and enjoyable to drive.