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Engine mounts, SET OF 2. Porsche 997.1 COUPE - 99737504908
99737504908/1KIT.1
Vehicle Group
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
Information
Engine mount set
This OE Match engine mount set is designed for Porsche 911 (997.1) Carrera and Turbo models and provides a complete solution for replacing the engine mounting system. The kit includes two OE Match engine mounts along with the correct genuine Porsche hexagon bolts and locknuts required for secure, factory-style installation.
SET OF 2, with bolt and nuts
Fits:
Fits:
Porsche 997.1 Carrera 2005 - 2008 COUPE
Porsche 997.1 Turbo 2007 - 2009 COUPE
Diagram Ref No 2, 3 and 4
Engine mounts are essential for supporting the engine while isolating vibration and maintaining proper drivetrain alignment.
Kit Includes
2 × OE Match Engine Mount – 99737504908
4 × Genuine Porsche Hexagon Bolt – 90037805501
2 × Genuine Porsche Nut – 99908421501
This kit contains everything needed to replace both engine mounts during servicing or drivetrain maintenance.
Engine mounts stabilise the engine and prevent excessive movement during acceleration, braking and cornering. By isolating vibrations and maintaining the correct drivetrain alignment, they help ensure smooth engine operation and improve overall driving comfort.
Replacing worn mounts restores the vehicle’s original ride quality and helps protect surrounding components such as the transmission, exhaust and drivetrain mounts.
Function
• Engine Support: Secures the engine to the chassis and rear subframe
• Vibration Isolation: Hydraulic design absorbs engine vibration and noise
• Drivetrain Stability: Maintains correct engine alignment during load changes
• Component Protection: Reduces stress on transmission and exhaust components
Engine mounts are exposed to continuous heat, vibration and engine torque. Over time the rubber and hydraulic components can deteriorate, leading to increased engine movement, cabin vibration and knocking noises during acceleration or shifting.
Replacing worn mounts with a matched OE Match set restores proper engine stability, improves driving refinement and helps extend the life of surrounding drivetrain components.
Replace the engine mounts if you notice:
• Increased vibration inside the cabin
• Clunking or knocking during acceleration or gear changes
• Excessive engine movement when revving
• Visible wear, cracking or leakage from the mount
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99737504908
The product you are viewing cross references to these numbers
This OE Match engine mount set is designed for Porsche 911 (997.1) Carrera and Turbo models and provides a complete solution for replacing the engine mounting system. The kit includes two OE Match engine mounts along with the correct genuine Porsche hexagon bolts and locknuts required for secure, factory-style installation.
SET OF 2, with bolt and nuts
Fits:
Fits:
Porsche 997.1 Carrera 2005 - 2008 COUPE
Porsche 997.1 Turbo 2007 - 2009 COUPE
Diagram Ref No 2, 3 and 4
Engine mounts are essential for supporting the engine while isolating vibration and maintaining proper drivetrain alignment.
Kit Includes
2 × OE Match Engine Mount – 99737504908
4 × Genuine Porsche Hexagon Bolt – 90037805501
2 × Genuine Porsche Nut – 99908421501
This kit contains everything needed to replace both engine mounts during servicing or drivetrain maintenance.
Engine mounts stabilise the engine and prevent excessive movement during acceleration, braking and cornering. By isolating vibrations and maintaining the correct drivetrain alignment, they help ensure smooth engine operation and improve overall driving comfort.
Replacing worn mounts restores the vehicle’s original ride quality and helps protect surrounding components such as the transmission, exhaust and drivetrain mounts.
Function
• Engine Support: Secures the engine to the chassis and rear subframe
• Vibration Isolation: Hydraulic design absorbs engine vibration and noise
• Drivetrain Stability: Maintains correct engine alignment during load changes
• Component Protection: Reduces stress on transmission and exhaust components
Engine mounts are exposed to continuous heat, vibration and engine torque. Over time the rubber and hydraulic components can deteriorate, leading to increased engine movement, cabin vibration and knocking noises during acceleration or shifting.
Replacing worn mounts with a matched OE Match set restores proper engine stability, improves driving refinement and helps extend the life of surrounding drivetrain components.
Replace the engine mounts if you notice:
• Increased vibration inside the cabin
• Clunking or knocking during acceleration or gear changes
• Excessive engine movement when revving
• Visible wear, cracking or leakage from the mount
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99737504908
99737504904
99737504906
99737504908
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
2 x Engine mount. Porsche 997.1 / 997.2 COUPE (99737504908/1
4 x Bolt for Stabiliser Bar Bush Clamp. Porsche Boxster / Cayman / 996 / 997 (90037805501
2 x Engine mount nut for Porsche 993 / 996 / 997 (99908421501
Price: €348.06
Arriving soon
Related products
Vehicle Group
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Engine mount Part number 987.375.023.05 (often written 98737502305) is
the centre engine mount / mount insulator used on mid-engine Porsche
Boxster/Cayman models, commonly fitted to late 986 and 987 Boxster / early 987
Cayman applications. The item is offered both as the complete mount and bracket
assembly and as a replacement bushing/insulator that must be pressed into the aluminium
bracket.
Fits:
This product supersedes Porsche's old part numbers:
- 98737502304
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98737502305
The product you are viewing cross references to these numbers
Position: center engine mount (the central mount that locates the engine fore/aft and resists torque).
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Replace the part when it has lost its ability to control engine movement and damp vibration. Typical triggers to replace the centre mount include:
- Hard clunk or bang on acceleration, deceleration or gear changes (engine shifting against chassis).
- Excessive vibration into the cabin, especially at idle or specific RPM bands.
- Visible damage — torn, separated rubber, oil-soaked or collapsed mount/bushing, or corrosion of mating faces.
Common issues & failure causes
- Rubber deterioration: age, heat cycling and mechanical fatigue cause the rubber to harden, crack or de-bond from the metal, reducing isolation and allowing increased engine movement.
- Fluid contamination: oil or coolant leaks accelerate rubber breakdown (softening or swelling), commonly seen on older engines where leaks occur.
- Mechanical shock / abuse: repeated hard launches, aggressive shifting or collisions can cause sudden mount failure or promote early fatigue.
- Bracket wear / corrosion: the bushing may be fine, but the aluminium bracket can crack, corrode, or the bushing may need pressing into a worn bracket — which is why some techs prefer replacing the full assembly.
This product supersedes Porsche's old part numbers:
- 98737502304
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98737502305
98737502304
98737502305
98637502307
9863750230
The product you are viewing cross references to these numbers
Price: €117.41
In stock
Vehicle Group
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Information
Engine Mount Stop.
Fits:
Porsche 987 Boxster / S 2005-08
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2005-08
Porsche 987C Cayman / S 2009-12
This product supersedes Porsche's old part numbers:
- 98737525503
- 98737525505
Price is for each.
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A137525701
The product you are viewing cross references to these numbers
Fits:
Porsche 987 Boxster / S 2005-08
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2005-08
Porsche 987C Cayman / S 2009-12
This product supersedes Porsche's old part numbers:
- 98737525503
- 98737525505
Price is for each.
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A137525701
9A137525701
98737525503
98737525505
The product you are viewing cross references to these numbers
Price: €35.32
In stock
Vehicle Group
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Information
Engine Suspension Bracket.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A137502322
The product you are viewing cross references to these numbers
Fits:
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2009-12
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A137502322
9A137502322
The product you are viewing cross references to these numbers
Price: €228.47
Arriving soon