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- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 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
FRONT
Fits:
Porsche 964 1989-94 (not RS)
Porsche 993 1994-98 (not RS)
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96434330100
The product you are viewing cross references to these numbers
- 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
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
This OE Match front shock absorber additional spring is a replacement suspension bump stop / auxiliary spring component for Porsche 997.1 and 997.2 models. It is designed to match the original-style fitment and function, helping support the front shock absorber assembly and protect suspension travel.
Sold individually, 2 required - fits left or right suspension strut
Fits:
Cars with standard chassis (Option code: I029) & PASM (Option code: I475)
Porsche 997.1 C2 / C2S 2005 - 2008
Porsche 997.1 C4 / C4S 2005 - 2008
Porsche 997.2 C2 / C2S 2009 - 2012
Porsche 997.2 C4 / C4S 2009 - 2012
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 Turbo 2010 - 2013
Diagram ref no 9
The shock absorber additional spring works with the front suspension strut assembly to help support suspension travel and damping control. It assists the shock absorber during compression and helps protect suspension components from excessive movement or harsh bottoming under load.
Functions
• Replaces the front shock absorber additional spring
• Fits left or right front shock absorber assembly
• Helps support suspension compression control
• Assists the shock absorber during suspension travel
• Helps reduce harsh bottoming and impact loads
• Replaces worn, split, compressed, damaged, or missing original springs
• OE Match replacement for Porsche 997 front suspension repair.
Why Replace This Part?
Shock absorber additional springs can wear, compress, split, deteriorate, or become damaged due to age, road impact, suspension load, heat, and moisture. A worn or missing additional spring can reduce suspension control, cause harsh ride quality, increase noise over bumps, or place extra stress on related suspension components. Replacing it helps restore correct front suspension function and ride control.
When to Replace This Part
• The front shock absorbers are being replaced or serviced
• The additional spring is worn, split, compressed, damaged, or missing
• Front suspension knocks, harshness, or bottoming is present
• Suspension travel feels poorly controlled
• Strut top mounts, bump stops, or related components are being renewed
• The front suspension assembly has been removed
• Preventative replacement is being carried out during suspension overhaul.
Where it fits on the car
This additional spring fits on the front shock absorber / strut assembly on Porsche 997.1 and 997.2 models. It can be used on the left or right front shock where part number 99634330102 is specified.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634330102
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 Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 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
Shock Absorber Groove Ball Bearing
Sold each - 2 required per car
Restore smooth and precise suspension operation with this OE
Match Shock Absorber Groove Ball Bearing. The groove ball bearing forms part of the shock absorber and
strut mounting assembly, allowing suspension components to move and rotate
smoothly while supporting the loads transmitted through the suspension.
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 Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 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
Diagram ref no 11
As these bearings age, wear or contamination can lead to increased friction, noise and rough operation. Replacing worn bearings during suspension maintenance can help restore smooth movement and eliminate unwanted play or noises from the strut assembly.
What Does a Shock Absorber Groove Ball Bearing Do?
The groove ball bearing allows controlled, low-friction movement within the suspension and shock absorber mounting assembly.
On the front suspension, smooth bearing movement is particularly important as the strut assembly responds to both suspension travel and steering inputs.
A correctly functioning bearing helps provide:
- Smooth suspension movement
- Reduced friction within the strut assembly
- Consistent steering movement
- Correct operation of associated suspension components
- Reduced unwanted noise and resistance
Why Do Shock Absorber Bearings Fail?
Suspension bearings operate under continuous load and are exposed to vibration, impacts and changing road conditions. Over time, this can cause the bearing surfaces to deteriorate.
Common causes of failure include:
- Normal age and mileage
- Water and moisture contamination
- Dirt and road debris
- Corrosion
- Repeated suspension impacts
- Deterioration of bearing lubrication
- Wear from prolonged suspension movement
Once worn, the bearing may no longer rotate smoothly and can develop play, stiffness or noise.
When Should the Bearing Be Replaced?
Replacement should be considered if:
- Knocking or clicking noises are present
- Steering movement feels rough or notchy
- Creaking or grinding is heard from the suspension
- Excessive play is found in the bearing
- The bearing is seized or difficult to rotate
- Corrosion or physical damage is visible
- Shock absorbers or upper suspension mounts are being replaced
Because access often requires dismantling part of the strut assembly, replacing worn bearings while fitting new shock absorbers or suspension mounts can help avoid duplicated labour later.
Porsche 996 / 997 / Boxster 986 / 987 / Cayman 987C Suspension Bearings
Shock absorber bearings are an important but often overlooked part of the Porsche suspension system. While shock absorbers and springs control suspension movement, bearings and mounts allow the assembly to operate smoothly without excessive friction or unwanted movement.
Age, mileage and exposure to road conditions can gradually deteriorate these components. When carrying out a suspension overhaul on a Porsche 996, 997, Boxster 986, Boxster 987 or Cayman 987C, inspecting the associated bearings, top mounts, bump stops and protective components can help identify wear before the suspension is reassembled.
Replacing worn components together can restore a tighter, quieter and more precise suspension system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634351505
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 Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 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
Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster MKI & MKII 2005>>
Porsche 987C Cayman MKI & MKII 2005>>
Porsche 996 C2 1998-05 (without sport suspension)
Porsche 997 MKI C2 / C2S 2005-08
Porsche 997 MKII C2 / C2S 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99734301801
The product you are viewing cross references to these numbers