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Your Porsche
TRW
TRW for Porsche
The highly professional TRW innovation team are completely focused on creating the most advanced Porsche products on the market, always engineered and tested to the highest possible standards. This means that we are able to deliver the most efficient, safe and durable Steering and Suspension products to you and to your customers.As one of the world’s largest aftermarket suppliers vital parts in OE-quality, we have a heritage that goes back one hundred years. With a wealth of diverse experience, we have fine-tuned our manufacturing processes and concentrated on satisfying customers much longer than most, so you can trust us to deliver, whether you need a simple car shock absorber or the latest cutting edge system for aftermarket steering parts
A Quick Look at TRW
TRW information on this page is based on details supplied by the manufacturer or distributor, plus any OE references provided with the parts.
Choosing the Right Fit for Your Porsche
Where TRW is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.
- Typical reasons to choose or replace TRW parts include refreshing worn suspension or steering joints, restoring braking performance, and addressing age-related wear without guesswork.
- Common real-world issues in this area include steering play, knocking over bumps, brake vibration, and uneven braking, often linked to worn ball joints or tie rods, seized calipers, old brake fluid, or incorrect installation torque.
- For safety-critical parts such as brakes and steering, watch for symptoms like pulling, vibration, or abnormal noises and investigate before they worsen.
- After any significant steering or suspension work, have the alignment checked and re-confirm torque settings after a short bedding-in period.
- When renewing left/right components such as dampers or control arms, replacing in pairs helps maintain balanced handling and predictable behaviour.
- Use service intervals and visible wear (perishing, leaks, excessive play) as cues for planning preventative replacement rather than waiting for a clear failure.
Browse by Category
If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.
Suspension & Axle — Suspension and axle components cover shocks, springs, arms, bushes, and joints that keep your Porsche stable, comfortable, and safe. Replacement is usually driven by wear, knocks over bumps, uneven tyre wear, or a general loss of ride and handling precision.
- After suspension work, plan for an alignment check and road test to confirm there is no remaining play or noise.
- Diagnose knocks and vibration carefully; multiple worn bushes or joints can contribute at once.
Ball Joints — Ball joints are safety-critical pivot points in the suspension that control steering precision and geometry. They are typically replaced when there is play, clunking, vague steering, or uneven tyre wear, restoring stability and confidence under braking and cornering.
- Check associated arms and bushes at the same time; fitting a new joint into a worn arm can be false economy.
- Plan on a wheel alignment after ball joint replacement to keep tyre wear and handling in check.
Shock Absorbers FRONT — Front shock absorbers are changed when damping fades, oil leaks appear, or the car feels floaty, unstable under braking, or unsettled over bumps. Choosing suitable front dampers helps bring back ride control, braking stability, and steering feel on your Porsche.
- Replace front shocks in left/right pairs to avoid uneven behaviour and unpredictable grip under braking.
- Consider renewing top mounts and related hardware if there are noises or high mileage on the existing parts.
Porsche Standard — Standard front suspension options are ideal when you want to retain the original Porsche balance of comfort and control. They are typically chosen during refresh work to keep the car close to factory behaviour rather than moving to a firmer or more focused setup.
- If chasing knocks or poor ride, inspect the full suspension system; issues are not always limited to dampers alone.
- Match standard components with appropriate springs and mounts so the system works as designed.
Special Offer Parts — Special offer parts can help reduce costs when tackling known Porsche wear items or grouped maintenance jobs. They are often used for routine service components or common refresh work, provided the part numbers and fitment details match your specific model.
- Always confirm compatibility by model, year, and specification before buying offer items, as returns can be inconvenient once the car is apart.
- Use offers to plan batches of work—combining service items or wear components can save on repeated labour.
Explore TRW at Design911
View the current TRW range for Porsche at Design911, then filter by model and category to narrow down to the right parts.
Steering rack gaiter kit
TRW steering rack gaiter kit for Porsche 986 Boxster and 996 models fitted with the specified later steering racks. Accessories are included for the front axle's left and right sides.
One kit per car required
Fits
Porsche 986 Boxster 1997 - 2004
Porsche 996 1998 - 2005
Please note
Fitting Position: Front Axle left and right,
For OE Steering Rack No.: 996.347.011.06, 996.347.011.07, 996.347.012.07, 996.347.012.08
Inner Diameter 1: 12,3 mm, Inner Diameter 2: 52 mm, Height: 195,3 mm, With accessories
What This Product Does
The bellows cover the moving rack ends and inner steering joints, helping exclude moisture and road debris while accommodating steering movement.
Functions
- Shield covered steering components against contamination.
- Maintain a flexible protective enclosure as the rack moves.
- Help protect inner joints from exposure when correctly secured.
Symptoms of Fault
- Visible tears, punctures or cracking in the bellows.
- Loose attachment points or contamination beneath the gaiter.
- Moisture entering the covered joint area.
Knocking or steering play warrants inspection of the joints and related components rather than assuming the gaiter alone is responsible.
Why Replacement Matters
A damaged or unsecured gaiter leaves the enclosed components exposed. Renewing it restores the protective covering, but any existing joint wear also needs assessment.
FAQs
How many kits does a vehicle need?
One kit per car required.
How do I confirm suitability?
Match the fitted steering rack number against the four OE rack references above.
Is alignment needed afterwards?
Have the alignment checked if track rods or steering adjustment settings are disturbed during installation.
What should be inspected during replacement?
Check the exposed inner joints for contamination and excessive play before fitting the new bellows.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634719104
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 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Steering rack gaiter kit
TRW steering rack gaiter kit for Porsche 986 Boxster and 996 models equipped with the early steering rack. Suitable for the left and right front axle positions and supplied with accessories.
One kit per car required
Fits
Porsche 986 Boxster 1997 - 2004
Porsche 996 1998 - 2005
Please note
Fitting Position: Front Axle left and right,
For OE Steering Rack No.: 996.347.011.05, 996.347.012.05
Inner Diameter 1: 12,3 mm, Inner Diameter 2: 48 mm, Height: 195,3 mm, With accessories
What This Product Does
The flexible bellows cover the moving rack ends and inner steering joints. They help exclude road grit and moisture while accommodating steering movement and keeping lubrication protected.
Functions
- Shield the covered steering components from contamination.
- Accommodate movement as the steering operates.
- Help protect lubricated inner joints from moisture exposure.
Symptoms of Fault
- Visible cracking, punctures or tears in the bellows.
- Loose attachment or contamination around the gaiter ends.
- Moisture or dirt found beneath the protective cover.
- Knocking where an exposed inner joint has developed wear.
Steering noise or looseness can have several causes. Inspect the rack and joints rather than assuming a replacement gaiter will resolve existing mechanical wear.
Why Replacement Matters
A damaged or poorly secured gaiter leaves the covered components exposed to water and abrasive debris. Renewing it restores the protective barrier, but cannot repair a worn joint or leaking rack. Check the inner joint and attachment points during the work.
FAQs
Will this fit every listed vehicle?
Confirm the installed rack reference: this kit is intended for the early rack specification.
Is alignment needed afterwards?
Have the wheel alignment checked if track rods are disturbed or their adjustment changes.
What should be inspected with the gaiter removed?
Check for inner-joint play, contamination and signs of rack leakage before fitting the replacement cover.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634719102
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 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
(TRW are the Original Manufacturer for Porsche)
Fits:
Porsche 986 Boxster 1997-2004 Rear
Please click 'Zoom in' to see the diagram (No 8)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98633104308
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
Fits:
Porsche 924 1978-85
Porsche 924 turbo 1979-84
Porsche 924 S 1986-88
Porsche 944 1982-85
Price is for each.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
171407365G
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87