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- 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
This OE Match engine mount kit is designed for Porsche 997 MK1 Carrera Cabriolet and Targa models with 3.6L and 3.8L engines. The set includes two OE Match hydraulic engine mounts along with the correct genuine Porsche bolts and nuts required for proper installation. Engine mounts secure the engine to the vehicle chassis while isolating vibrations and maintaining correct drivetrain alignment during operation.
SET OF 2 with bolts and nuts
Fits:
Porsche 997.1 Carrera 3.6L / 3.8L 2005 - 2008 CABRIO
Porsche 997.1 Carrera 3.6L / 3.8L 2005 - 2008 TARGA
Diagram Ref No 2, 3 and 5.
Kit Includes:
2 × OE Match Engine Mount – 99737504907
4 × Genuine Porsche Hexagon-head bolt – 90037805501
2 × Genuine Porsche Hexagon nut M12 × 1,5 – 99908421501
This complete kit allows both engine mounts to be replaced at the same time, ensuring balanced support and proper engine positioning.
Engine mounts stabilise the powertrain and isolate engine vibration from the chassis and passenger compartment. By controlling engine movement during acceleration, braking and cornering, they help maintain smooth driving characteristics and protect other drivetrain components from excessive stress.
Replacing worn mounts restores engine stability and improves ride comfort.
Function
• Engine Support: Secures the engine to the chassis structure
• Vibration Isolation: Hydraulic design reduces engine vibration transmitted to the cabin
• Alignment Stability: Maintains correct engine and drivetrain positioning
• Ride Comfort: Helps ensure smooth and quiet vehicle operation
Engine mounts are exposed to constant load, heat and vibration. Over time the hydraulic fluid and rubber components can deteriorate, allowing excessive engine movement. This can lead to increased vibration, noise, and stress on the drivetrain. Replacing both mounts together ensures balanced support, restores smooth engine operation and protects surrounding components.
Replace engine mounts if you notice:
• Increased vibration inside the cabin
• Clunking or movement during acceleration or gear changes
• Engine movement when revving
• Visible cracking or collapse of the mount
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99737504907
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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
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
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08
Click 'Zoom in' for large parts diagram.
Fits to no. 2 on the diagram.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98737502305
The product you are viewing cross references to these numbers
- 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
Engine mount
Keep your vehicle running smoothly with this high-quality engine
mount designed to match OEM standards for durability and performance. The
engine mount (also known as a motor mount) plays a vital role in supporting
your engine and isolating vibration from the chassis.
Fits:
Porsche Boxster 987 MKII 2.9L 2009-2012
Porsche Boxster S 987 MKII 3.4L 2009-2012
Porsche Cayman 2.9L 987C MKII 2009-12
Porsche Cayman S / R 3.4L 987C MKII 2009-12
Diagram ref no 1
Product Overview
This precision-engineered engine mount securely holds your
engine in place while absorbing vibrations and road shocks. Manufactured from high-grade
steel and vibration-resistant rubber or hydraulic components, it ensures
long service life even under demanding driving conditions.
Key Features & Benefits
Symptoms of a Worn or Failing Engine Mount - If your engine mount is worn, you may notice:
These symptoms suggest it’s time for replacement before further damage occurs.
Common Causes of Failure - Engine mounts naturally wear out due to:
Why Replace an Engine Mount? - Replacing your mount restores stability, comfort, and
safety.
Quality You Can Trust
All mounts are manufactured to OEM or higher standards,
tested for vibration resistance, and backed by our quality guarantee. Replace
both left and right mounts if necessary for balanced support and maximum
longevity.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A137502322
The product you are viewing cross references to these numbers