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Bilstein cars with PASM

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DISPLAYING 1 to 3 (of 3 products)
26-147543KIT.1
Product Information
Product Information

Bilstein B4 rear shock absorbers with top mounts, supplied as a set of two for Porsche 997 models equipped with PASM. This package combines replacement dampers and mounts for rear suspension renewal.

Fits

Porsche 997 C2 / C2S / C4 / C4S - Car with PASM electronic damper control (I475)

  • 997 MK1 Carrera 2 3.6L 2005–08
  • 997 MK1 Carrera 2S 3.8L 2005–08
  • 997 MK1 Carrera 4 3.6L 2005–08
  • 997 MK1 Carrera 4S 3.8L 2005–08
  • 997 MK1 TURBO 2007–09
  • 997 MKII Carrera C2 3.6L 2009–12
  • 997 MKII Carrera C2S 3.8L 2009–12
  • 997 MKII Carrera C4 3.6L 2009–12

What This Product Does

The dampers regulate rear suspension movement as the wheels travel over uneven surfaces. Their electronic control compatibility allows the factory PASM system to manage damping, while the top mounts provide the upper connection between each damper assembly and the body.

Functions

  • Controls rear suspension oscillation.
  • Works with the existing PASM damping controls.
  • Connects the rear damper assemblies through their upper mounts.

Technical Details

  • Product reference: VA7-E754. B4 replacement specification; rear axle set of two shock absorbers with top mounts.
  • Supplied damper specification: twin-tube construction, gas pressurisation and original-equipment damping characteristics.
  • 99733305325: I475 application for 997.1 Carrera 2 / Carrera 2S Coupé and Cabriolet, plus Carrera 4 / Carrera 4S, 2005–08; diagram quantity two.
  • 99733304903: I475 application for 997.1 Targa / Targa S, 2007–08; diagram quantity two.
  • 99733305337: 997.2 Carrera 2 / Carrera 2-S Coupé and Cabriolet, PR:475; Speedster, PR:029,475,503 and PR:475,503; Carrera GTS Coupé and Cabriolet, PR:011,475; 2009–12. Each diagram entry specifies quantity two.
  • 99733305337: 997.2 Carrera 4 / Carrera 4-S Coupé and Cabriolet, PR:475; 4 GTS Coupé and Cabriolet, PR:019,475; 2009–12. Each diagram entry specifies quantity two.

Symptoms of Fault

  • Repeated rear bouncing after road impacts.
  • Oil seepage from a damper body.
  • Knocking around the rear suspension mounts.
  • Uneven rear tyre wear or an unsettled ride.
  • PASM warnings or unexpected changes in damping response.

Why Replacement Matters

Renewing worn rear dampers together avoids combining different wear levels across the axle. Including top mounts allows these associated connections to be renewed during the same repair. Confirm the source of any noise or electronic fault first: bushes, links, wiring and connectors can produce symptoms similar to damper failure.

FAQs

Is this package intended for PASM-equipped cars?
Yes. The supplied application specifies electronic damper control, option I475.

Are top mounts included?
Yes. The package comprises two rear shock absorbers and top mounts.

Will replacement resolve every PASM warning?
No. A warning caused by wiring, connectors or another system component requires separate diagnosis.

Should alignment be checked afterwards?
Arrange a geometry check following suspension work, with adjustment where required.



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

26-147543KIT.1
99733304903
99733305320
99733305325
99733305330
26147543
99733305337
26-147543
99733305332

The product you are viewing cross references to these numbers
BILSTEIN9972B4P
Product Information
Product Information
Bilstein Replacement FRONT and REAR shock absorbers PACKAGE, SET OF 4.

Bilstein Replacement for the Original Spec

fr
Porsche 997 C2 / C2S - For vehicles with PASM, For vehicles with electronic suspension control

B4 High Quality direct replacement shock absorbers constructed and finished to Bilstein's high standards often far and above what the car was originally supplied with. They can actually be a performance improvement if replacing plain, none gas charged, oil filled dampers. They dramatically reduce cavitation / oil foaming, thus give for more stable damping forces when driven 'spiritedly'. Some surprising cars come with plain oil filled dampers.

Key Features:
- Twin Tube Damper
- Gas pressurized
- OE damping forces

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

BILSTEIN9972B4P
22-147530
22147530
26-147543
26147543
99734304513
99734304514
99734304516
99734304521
99734304522
99734304523
99734304513
99734304514
99734304516
99734304517
99733305337
99734304524
99733305332

The product you are viewing cross references to these numbers
Best Price
26-147543
Product Information
Product Information
Bilstein Original Equipment Shock Absorber

Bilstein Replacement for the Original Spec

Fits:
Porsche 997 C2 / C2S / C4 / C4S - Car with PASM electronic damper control (I475)

B4 High Quality direct replacement shock absorbers constructed and finished to Bilstein's high standards often far and above what the car was originally supplied with. They can actually be a performance improvement if replacing plain, none gas charged, oil filled dampers. They dramatically reduce cavitation / oil foaming, thus give for more stable damping forces when driven 'spiritedly'. Some surprising cars come with plain oil filled dampers.

Key Features:
- Twin Tube Damper
- Gas pressurized
- OE damping forces

Please Note:
Price is for each damper you will need to buy 2

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

26-147543
99733305337
99733305332

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
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About Bilstein cars with PASM

Bilstein with PASM

At Design911, we supply Bilstein dampers specifically for Porsche models equipped with PASM (Porsche Active Suspension Management), helping you retain the factory adaptive damping functions while renewing tired or faulty suspension components.

Bilstein with PASM

Bilstein PASM-compatible dampers are designed to work with the original Porsche adaptive control system, so your Comfort/Sport modes and dashboard controls continue to operate as intended while you restore ride control and stability.

Why do Bilstein with PASM matter?

On PASM-equipped Porsche models, the dampers are closely integrated with the car’s control systems. When they age or fail, you can experience warning lights, inconsistent behaviour between modes, or a loss of the balanced feel the car had when new. Using PASM-compatible Bilstein units allows you to renew worn components without deleting or bypassing the adaptive features that are central to how these cars drive.

  • Keep your Porsche PASM system operating as Porsche intended, with working mode selection
  • Restore consistent, controlled damping where original units are worn or leaking
  • Address PASM-related fault messages when the damper itself is the underlying issue
  • Support long-term enjoyment and confidence in PASM-equipped Porsche models

Individual replacement dampers

Bilstein PASM-compatible units that allow you to replace only the affected corners or axles on your Porsche while retaining the factory control strategy.

  • Suitable when one or more original PASM dampers is leaking or faulty
  • Lets you keep the rest of the suspension close to standard specification
  • Useful for targeted renewal on higher-mileage cars

Matched axle sets

Dampers supplied for a full axle (front or rear) so that both sides are renewed together for consistent behaviour and response.

  • Helps maintain even damping left to right
  • Reduces the risk of mixed wear levels on the same axle
  • A sensible choice when carrying out planned suspension refresh work

Complete suspension packages

In some cases, PASM-compatible Bilstein dampers are combined with associated hardware or other suspension components to simplify a more extensive refresh or upgrade.

  • Brings key parts together in one package for convenience
  • Supports more comprehensive suspension restoration on PASM-equipped Porsche models
  • Useful when working on higher-mileage or heavily used cars

Brands available in this category

For this category we stock a wide choice of trusted brands for Porsche models. You can also browse and filter by brand on this page to focus on your preferred manufacturers.

  • Bilstein – PASM-compatible dampers developed for Porsche models with factory active suspension, aimed at maintaining the intended balance between comfort and control while renewing worn components.

When should you review or replace your Bilstein with PASM shock absorbers?

On PASM-equipped Porsche models, it is worth paying attention to how the system behaves and to any changes in ride or dashboard messages. Because the dampers are managed electronically, issues may show up as both physical symptoms and warning lights.

  • You see PASM warnings or mode-related fault messages on the dashboard
  • Damping feels inconsistent between modes or appears stuck in one behaviour
  • There are knocks, leaks or obvious signs of wear at the dampers themselves
  • The car no longer feels as composed over bumps as it did, despite correct tyres and geometry

If any of these apply, it is a good time to inspect the PASM system and associated components. When the fault traces back to the damper units, replacing them with PASM-compatible Bilstein parts can help restore normal behaviour while retaining the original functionality.

Explore Bilstein with PASM with Design911

Browse Bilstein options for PASM-equipped Porsche models at Design911 — from individual replacement dampers to axle sets — and find solutions that work with your car’s existing adaptive suspension control while renewing tired components.

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