Bilstein 40-231990 B3 OE Replacement Rear Left Air Suspension Spring for BMW E39 5 Series Touring is the trusted, direct-fit OE quality rear air spring that restores factory ride height, comfort and stability. If your E39 Touring is sitting low at the back, sagging overnight or the compressor is working overtime, this rear left air bag is the proven fix. Designed as an exact replacement for the original rear nearside air spring, the Bilstein B3 air bellows delivers the smooth, consistent performance BMW owners expect, whether you have standard or sport suspension.
We use Bilstein B3 air springs on our own cars and customer vehicles, and the feedback is consistently excellent. Our customers love the OEM ride quality, precise handling and dependable load-levelling performance this BMW E39 rear left air suspension spring provides.
Why choose this Bilstein B3 air spring for your BMW E39 Touring
- Direct-fit OE replacement rear left air spring for BMW E39 5 Series Touring
- Restores factory ride height, comfort and self-levelling performance
- Uncompromising comfort and driving characteristics under any load
- Rapid adjustment to road and driving conditions
- Constant performance thanks to stable counter-pressure in the bellows
- High power reserves for maximum safety and stability
- Ideal for replacing leaking, perished or cracked rear air bags
Fitment and position
Fitting position: Rear axle left (nearside rear in the UK)
Spring design: Air spring
Suspension: For vehicles with standard or sports suspension
Vehicle type: BMW 5 Series Touring E39 with rear self-levelling air suspension
Compatibility
BMW 5 Series Touring E39 09/1996 to 06/2004, including:
- 520i, 523i, 525i, 528i, 530i, 540i
- 520d, 525d, 525tds, 530d
Note: This part is for the Touring estate models. Not for E39 Saloon.
Cross reference
If you need the opposite side, order the matching Rear Right air spring: Bilstein 40-232003 BMW E39 B3 OE Replacement Rear Right Air Suspension Spring.
Part numbers and identifiers
Part number: BILSTEIN-40-231990 / 40-231990
EAN: 4025258739768
UPC: 651860741031
Quality you can trust
Bilstein B3 air springs are engineered to preserve genuine BMW driving dynamics. As a like-for-like replacement for the factory air spring, this unit maintains consistent ride height and handling even with passengers, luggage or towing.
Installation and fitting
Professional fitting recommended. We can help. Book installation with Nforcd in Warwickshire or request a fitting quote at Sales@nforcd.com. We also recommend replacing rear air springs in pairs for best results.
Compatibility check before dispatch
To ensure the part fits your vehicle, we run a compatibility check prior to dispatch. Provide your UK registration number or the last 7 digits of your VIN at checkout and we will confirm suitability.
Search-friendly terms
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