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- 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 C4 3.6L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13

Bilstein Replacement for the Original Spec
Fits:
Porsche 997 C4 / C4S / Turbo - 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Related, superseded, cross reference or alternative numbers for comparison.
BILSTEIN9974B4P
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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 C4 3.6L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
Bilstein Replacement for the Original Spec
Fits:
Porsche 997 C4 / C4S / Turbo 2004-2012- 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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
22-147554
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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 C4 3.6L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13

Bilstein Replacement for the Original Spec
Fits:
Porsche 997.1 C4 / C4S / Turbo 2004-2008- Car with PASM electronic damper control (I475)
Porsche 997.2 C4 / C4S / Turbo 2009-2012- 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.
22-3478
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

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
The product you are viewing cross references to these numbers
Bilstein B4 (Cars with PASM Button) for Porsche
Bilstein B4 standard replacement dampers for Porsche models with PASM (Porsche Active Suspension Management) are designed to work seamlessly with the factory adaptive system. They allow you to renew tired, leaking or faulty original dampers while keeping your Porsche’s Comfort/Sport mode button and PASM functions operating as intended.
Our product range in this category
Depending on model, you will find front and rear Bilstein B4 PASM-compatible dampers listed individually and in logical groupings, so you can replace a single faulty unit or renew an axle at the same time. Use the filters and fitment information on the page to locate the correct parts for your specific Porsche with PASM button.
Why do Porsche Bilstein B4 (cars with PASM button) matter?
On PASM-equipped Porsche models, the dampers form a key part of the electronic suspension system. When they age or fail, you may see warning lights, notice inconsistent behaviour between modes, or feel that the car has lost the balanced, confidence-inspiring character it had when new. Replacing worn original units with Bilstein B4 PASM-compatible dampers helps restore normal operation without deleting or bypassing the adaptive features that many owners value.
- Keep your Porsche PASM system functioning as Porsche intended, with working mode selection and dashboard controls
- Renew damping control and stability where original PASM dampers are worn, leaking or noisy
- Address PASM-related fault messages when the damper itself is the root cause
- Support long-term enjoyment and a factory-like character on Porsche models with PASM
Common options & kits
Individual replacement dampers
Bilstein B4 PASM-compatible dampers supplied per corner or per side, allowing you to deal with a specific leaking or faulty unit while retaining the original suspension layout.
- Suitable when only one or two PASM dampers have failed
- Lets you keep the rest of the suspension close to standard
- Useful for targeted repairs on higher-mileage Porsche models
Matched axle sets
Dampers supplied as a matched pair for a full axle (front or rear), so both sides are renewed together for consistent response.
- Helps maintain even damping left to right
- Reduces the risk of mixed wear levels on the same axle
- A sensible approach when planning a suspension refresh
Complete suspension packages
In some cases, PASM-compatible Bilstein B4 dampers are combined with associated hardware or other suspension parts to simplify more extensive work.
- Brings key components together in one package
- Supports broader suspension restoration on PASM-equipped Porsche models
- Particularly useful on higher-mileage or heavily used cars
Brands available in this category
For this category we stock a focused selection of trusted options for Porsche models with PASM. You can also browse and filter by brand on this page to narrow down your search.
Bilstein – PASM-compatible B4 standard replacement dampers developed for Porsche models with factory active suspension, aimed at maintaining an original-style balance between comfort and control while renewing worn components.
When should you review or replace your Porsche Bilstein B4 (cars with PASM button)?
Because PASM dampers are electronically managed, issues can show up as both physical symptoms and dashboard messages. It is worth paying attention to any changes in ride, mode behaviour or warning lights.
- You see PASM warnings or mode-related fault messages on the dashboard
- Damping feels inconsistent between modes, or the car seems stuck in one type of behaviour
- There are knocks, leaks or obvious signs of wear at one or more dampers
- The car no longer feels as composed over bumps as it did when new, despite correct tyres and geometry
If any of these apply, it is a sensible time to inspect the PASM system and related components. Where the fault traces back to the damper units, replacing them with Bilstein B4 PASM-compatible parts can help restore predictable behaviour while retaining the original adaptive functionality.
Explore Porsche Bilstein B4 (cars with PASM button) with Design911
Browse Bilstein B4 standard replacement dampers for PASM-equipped Porsche models at Design911 — from individual units to axle sets and packages — and find parts that work with your car’s existing adaptive suspension while renewing tired components. Our fitment information and specialist support can help you choose the correct items for your specific Porsche.