Shock Absorber Parts FRONT

Shock absorber top strut support.  FRONT

Fits:
For Cars WITH STANDARD Suspension / M030 Sport suspension
Porsche 996 C4 1998-05
Porsche 996 C4S 1998-05
Porsche 996 Turbo 1998-05

Diagram ref no 12

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99634301

The product you are viewing cross references to these numbers

Shock Absorber Top Strut Support, FRONT.

The OE MATCH Front Shock Absorber Top Strut Support is a high-quality replacement suspension mounting component designed for Porsche 911 (996) Carrera 4, Carrera 4S and Turbo models manufactured between 1998 and 2005.

Fits:
For Cars WITH STANDARD Suspension / M030 Sport suspension

• Porsche 996 C4 1998-05
• Porsche 996 C4S 1998-05
• Porsche 996 Turbo 1998-05

Diagram Ref No 12

Designed to provide OE-style fitment, functionality and durability, this front suspension top mount connects the upper section of the shock absorber strut assembly to the vehicle's body structure.

Also known as a front suspension strut top mount, shock absorber upper support or suspension mounting, this component plays an important role in maintaining suspension stability, absorbing vibration and supporting the correct positioning of the front shock absorber.

Available in left-hand and right-hand versions, the OE MATCH Front Shock Absorber Top Strut Support is designed for applicable vehicles equipped with standard suspension or the M030 sports suspension option.

The strut support incorporates metal and rubber elements to provide a combination of structural strength and controlled flexibility. It helps isolate vibration and impact forces transmitted from the road through the suspension system.

During normal driving, the front suspension is subjected to continuous forces generated by steering, braking, cornering, acceleration and uneven road surfaces.

Over time, the rubber elements within the original mounting can deteriorate due to ageing, repeated compression, vibration and exposure to environmental conditions.

A worn or damaged top strut support may cause knocking noises, excessive suspension movement, increased vibration, reduced steering precision or deterioration in ride quality.

The OE MATCH replacement provides a practical solution for restoring the original upper shock absorber mounting arrangement without replacing the complete suspension strut assembly when the remaining components are serviceable.

Ideal for suspension repairs, front shock absorber replacement, chassis refurbishment and preventative maintenance, this component helps maintain the ride comfort, stability and handling characteristics expected from a Porsche 911.

What This Product Does:
The front shock absorber top strut support provides the upper mounting connection between the suspension strut and the vehicle's body structure.

It helps retain the shock absorber in its correct position while managing forces and vibration transmitted through the front suspension system.

Its key functions include:

• Shock Absorber Mounting: Provides a secure upper mounting point for the front suspension strut.
• Suspension Support: Helps maintain the intended positioning and stability of the shock absorber assembly.
• Vibration Isolation: Uses its resilient mounting elements to reduce vibration transferred from the suspension into the vehicle's body.
• Road Impact Absorption: Helps cushion certain forces generated when driving over bumps, potholes and uneven road surfaces.
• Steering Stability: Supports consistent suspension positioning during steering movement.
• Handling Precision: Contributes to the predictable steering and handling characteristics of the Porsche 996.
• Suspension Geometry Support: Helps maintain the correct upper strut mounting location.
• Reduced Suspension Noise: Limits the transmission of knocking and vibration when the mounting is in good condition.
• Controlled Suspension Movement: Allows the intended movement and compliance of the front suspension assembly.
• Load Distribution: Transfers suspension forces through the intended upper mounting points.
• Ride Comfort: Helps reduce harshness and vibration entering the cabin.
• Original Suspension Configuration: Maintains the factory-style front suspension mounting arrangement.
• Standard and Sports Suspension Compatibility: Suitable for specified vehicles equipped with standard suspension or M030 sports suspension.
• OE-Style Replacement: Provides a replacement for worn or damaged original Porsche suspension top mounts.

Symptoms Of Wear Or Failure:
Over time, the front shock absorber top strut supports may deteriorate due to repeated suspension movement, rubber ageing, road impacts and prolonged exposure to environmental conditions.

Common symptoms include:

1. Knocking or Clunking from the Front Suspension

A worn top strut support may produce knocking or clunking noises when driving over bumps, potholes or uneven roads.

Excessive movement within the upper mounting can cause unwanted mechanical contact.

2. Excessive Steering Vibration

Deteriorated mounting rubber may allow more vibration to pass from the suspension into the steering system and vehicle body.

3. Increased Road Noise

A damaged or hardened mount can reduce vibration isolation, allowing additional road and suspension noise into the passenger compartment.

4. Reduced Steering Precision

Excessive movement at the upper strut mounting may affect the consistency of suspension positioning, contributing to vague or less predictable steering response.

5. Uneven Tyre Wear

A severely worn or damaged top mount may contribute to suspension geometry problems and irregular tyre wear.

However, incorrect wheel alignment, worn control arms and tyre pressure issues are also common causes.

6. Poor Ride Comfort

Deteriorated rubber elements may reduce the mount's ability to isolate vibration and road impacts.

The vehicle may feel harsher or transmit more vibration over uneven surfaces.

7. Excessive Front Suspension Movement

A worn mounting may allow unwanted movement at the top of the suspension strut.

This may become apparent during a workshop inspection.

8. Cracked or Perished Rubber

Visible cracking, splitting or deterioration of the mount's rubber components indicates age-related wear.

9. Separation of Rubber and Metal Components

Severe deterioration may cause the resilient mounting material to separate from its surrounding metal structure.

This can compromise the mount's ability to support and locate the suspension strut correctly.

10. Unusual Noises While Turning

A worn top mount or associated strut bearing may cause creaking, clicking or knocking during steering movements.

11. Damaged Mounting Points

Corrosion, impact damage or previously incorrect installation may affect the mounting hardware or metal support structure.

12. Suspension Instability

A severely damaged mounting may contribute to inconsistent handling or unwanted movement during cornering and braking.

13. Uneven Front-End Height or Positioning

Significant deformation or damage to the upper mount may affect the position of the suspension assembly.

Any noticeable ride-height difference should be investigated alongside the springs, dampers and other mounting components.

14. Damage Identified During Shock Absorber Replacement

Deteriorated top mounts are frequently discovered when the front suspension strut is removed for damper replacement or refurbishment.

Why Replacement Matters:

• Replacing worn or damaged front shock absorber top strut supports is an important part of maintaining the handling precision, suspension stability, ride comfort and roadworthiness of your Porsche 996.
• The front suspension system is designed to absorb road irregularities while maintaining consistent tyre contact and predictable steering behaviour.
• The top strut support forms an essential connection between the front shock absorber assembly and the vehicle's body structure.
• If this mounting becomes worn, cracked or distorted, the upper section of the suspension strut may no longer remain correctly supported.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99634301

The product you are viewing cross references to these numbers

Shock absorber additional spring. FRONT
Front shock absorber bump stop and dust cover kit by OE Match for Porsche 986 Boxster, 987 Boxster, 987C Cayman and 996 models. This SET OF 4 contains the components required to service both front suspension struts.
SET OF 4


Porsche 996 C2 / C4 / C4S 1998 - 2005
Porsche 996 Turbo 2001 - 2005
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012

Diagram ref no.: 8 and 9

What This Product Does

The additional springs, commonly described as bump stops, provide progressive cushioning as the suspension approaches the end of its compression travel. The bellows cover the exposed shock absorber piston rods, helping to limit contact with road dirt and other contamination. Together, these parts support correct shock absorber operation and are suitable for installation during front suspension servicing.

Functions

• Cushions the final stage of front suspension compression
• Helps prevent harsh metal-to-metal bottoming
• Protects the shock absorber piston rod from road contamination
• Supports controlled movement of the front strut assembly
• Replaces deteriorated, split or compressed original components
• Allows both front suspension struts to be serviced together

Technical Details

• Position: Front axle
• Quantity: SET OF 4
• Contents: two additional springs and two shock absorber bellows
• Additional spring reference: 99634330102
• Bellows reference: 99634350500
• Exploded diagram reference numbers: 8 and 9

Symptoms of Fault

• Harsh impacts when the suspension is heavily compressed
• Knocking or increased noise over uneven surfaces
• Split, crumbling or permanently compressed bump stops
• Torn or detached shock absorber dust covers
• Visible dirt or contamination around the shock absorber piston rod
• Poorly controlled suspension travel when encountering larger bumps

Why Replacement Matters

Bump stops and bellows deteriorate through age, repeated compression, heat, moisture and road contamination. Worn components can reduce protection for the shock absorber and allow harsher suspension compression. Replacing them while the front struts are dismantled avoids reusing perished parts and can reduce the need to repeat the same labour later. OE Match components are intended as OE-equivalent replacements for routine suspension maintenance.

OE Reference

• 99634330102 — shock absorber additional spring
• 99634350500 — shock absorber bellows

FAQs

• Does this kit service both front struts?
  Yes. The SET OF 4 contains two additional springs and two bellows for the left and right front shock absorber assemblies.
• Should these parts be renewed with new shock absorbers?
  Replacement is advisable when the existing parts are split, compressed, damaged or perished, particularly while the struts are already dismantled.
• Is wheel alignment required afterwards?
  An alignment check is generally recommended following significant suspension work or if the vehicle shows uneven tyre wear or altered steering behaviour.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99634330102

The product you are viewing cross references to these numbers