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Engine mount kit, SET OF 2. Porsche 996 Turbo - 99337504909
99337504909/1KIT.3
Vehicle Group
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
Information
Engine mount kit
The OE Match Engine Mount Kit is a complete replacement solution for Porsche 996 Turbo models. It includes two OE Match engine mounts along with genuine Porsche bolts, washers, and locknuts for a secure and correct installation.
SET OF 2, with bolts, washers and nuts
Fits:
Porsche 996 (911) Turbo 2000 - 2005
Diagram ref no 2, 3, 4 and 5
This comprehensive kit is designed to replace both engine mounts and all associated mounting hardware in one package.
Kit includes:
• 2 × OE Match engine mounts (99337504909)
• 4 × Genuine Porsche bolts (90037815901)
• 4 × Genuine Porsche washers (PCG02513402)
• 2 × Genuine Porsche locknuts (99908421501)
The engine mounts are manufactured to OE specifications, ensuring precise fitment and optimal vibration damping. Featuring a hydraulic (fluid-filled) design, they effectively absorb engine movement and reduce noise, maintaining the refined driving characteristics expected from a Porsche 996 Turbo.
Including genuine Porsche hardware ensures correct torque, alignment, and long-term reliability, eliminating the risks associated with reusing old or stretched fixings.
This kit stabilises the engine within the chassis while minimising vibration and movement during acceleration, braking, and cornering. It restores smooth power delivery, improves driving comfort, and ensures proper drivetrain alignment.
Replacing both mounts and hardware together provides a complete system refresh, eliminating common sources of vibration and noise.
Function
• Supports and secures the engine in position
• Absorbs vibration and reduces cabin noise
• Maintains correct drivetrain alignment
• Ensures secure installation with OE-spec hardware
This kit is essential for maintaining performance, comfort, and drivetrain integrity.
Over time, engine mounts degrade due to heat, load, and fluid wear. This can result in increased vibration, excessive engine movement, and reduced driving comfort. Replacing both mounts along with new genuine hardware ensures proper installation, restores smooth operation, and protects surrounding drivetrain components from stress and premature wear.
When to replace
• Increased vibration in cabin, steering, or pedals
• Clunking noises during acceleration or gear changes
• Visible wear or fluid leakage from mounts
• Engine movement or misalignment
• During engine or transmission service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99337504909
The product you are viewing cross references to these numbers
The OE Match Engine Mount Kit is a complete replacement solution for Porsche 996 Turbo models. It includes two OE Match engine mounts along with genuine Porsche bolts, washers, and locknuts for a secure and correct installation.
SET OF 2, with bolts, washers and nuts
Fits:
Porsche 996 (911) Turbo 2000 - 2005
Diagram ref no 2, 3, 4 and 5
This comprehensive kit is designed to replace both engine mounts and all associated mounting hardware in one package.
Kit includes:
• 2 × OE Match engine mounts (99337504909)
• 4 × Genuine Porsche bolts (90037815901)
• 4 × Genuine Porsche washers (PCG02513402)
• 2 × Genuine Porsche locknuts (99908421501)
The engine mounts are manufactured to OE specifications, ensuring precise fitment and optimal vibration damping. Featuring a hydraulic (fluid-filled) design, they effectively absorb engine movement and reduce noise, maintaining the refined driving characteristics expected from a Porsche 996 Turbo.
Including genuine Porsche hardware ensures correct torque, alignment, and long-term reliability, eliminating the risks associated with reusing old or stretched fixings.
This kit stabilises the engine within the chassis while minimising vibration and movement during acceleration, braking, and cornering. It restores smooth power delivery, improves driving comfort, and ensures proper drivetrain alignment.
Replacing both mounts and hardware together provides a complete system refresh, eliminating common sources of vibration and noise.
Function
• Supports and secures the engine in position
• Absorbs vibration and reduces cabin noise
• Maintains correct drivetrain alignment
• Ensures secure installation with OE-spec hardware
This kit is essential for maintaining performance, comfort, and drivetrain integrity.
Over time, engine mounts degrade due to heat, load, and fluid wear. This can result in increased vibration, excessive engine movement, and reduced driving comfort. Replacing both mounts along with new genuine hardware ensures proper installation, restores smooth operation, and protects surrounding drivetrain components from stress and premature wear.
When to replace
• Increased vibration in cabin, steering, or pedals
• Clunking noises during acceleration or gear changes
• Visible wear or fluid leakage from mounts
• Engine movement or misalignment
• During engine or transmission service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99337504909
99337504909
99337504905
99337504907
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 996 Turbo / 993 (99337504909/1
4 x M8x60 Bolt for Lower Idler Pulley for Porsche 986 Boxster 2.7L / 3.2L & 996 Carrera 3.4L / 3.6L (90037815901
4 x Engine mount washer. Porsche 964 RS / 993 RS (PCG02513402
2 x Engine mount nut for Porsche 993 / 996 / 997 (99908421501
Price: £211.82
In stock
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: £99.50
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: £27.63
Arriving soon
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
Our polyurethane bushes are ideal replacements for worn or damaged parts. Engine mount bushes are particularly prone to cracking of the rubber because of a large amount of voiding in the material to allow for excessive movement. For an insert only please use PFR57-521BLK.
OEM Part Number: 98737502305
OEM Part Number: 9A137502322
Fits:
Porsche Boxster 986 (1997-2004)
Porsche Boxster 987 (2005-2009)
Porsche Cayman 987C (2005 - 2009)
up to 2009 with engine codes M9625, M9626, M9720, M9721 & M9722
DIAGRAM REFERENCE: 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PFR57-520BLK
PFR57-520
PFR57520
98737502305
9A137502322
PFR57520BLK
The product you are viewing cross references to these numbers
Price: £65.30
In stock