Bilstein B3 Rear Air Suspension Spring, BMW X5 X6 OE Replacement, Part No. 40-221595
Upgrade your BMW air suspension with the genuine Bilstein B3 rear air spring, part number 40-221595. This OE replacement rear air suspension spring is designed for BMW X5 and X6 models that use rear self-levelling air suspension. Expect factory-correct ride height, outstanding comfort and dependable performance. Perfect for curing sagging rear suspension and restoring that smooth, controlled BMW drive.
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Why choose Bilstein B3 for your BMW
The Bilstein B3 air spring is engineered to maintain original BMW driving dynamics. It delivers consistent support and comfort under load, with rapid response to changing road conditions. Ideal when the air spring and shock absorber are separate units, this is the trusted OE-quality solution for long-lasting reliability.
- Uncompromising comfort and factory-correct driving characteristics
- Rapid adjustment to road and driving conditions
- Constant damping support under any load for stable handling
- High power reserves for maximum safety and confidence
We have fitted Bilstein B3 air springs for customers and on our own builds. Feedback has been excellent, with owners praising the restored ride quality, correct ride height and durability.
Fitment and compatibility
Rear axle fitment, air spring design. Suitable for BMW models with rear air suspension where the air spring and shock are separate components.
- X SERIES
- X5 (E70) 02.06 - 07.13
- xDrive 30 i, 3.0 si, xDrive 35 i, xDrive 40 i, 4.8 i xDrive, xDrive 48 i, xDrive 50 i, 3.0 3.0d, xDrive 30 d, 3.0 d, 3.0 sd, xDrive 35 d, xDrive 40 d
- X6 (E71, E72) 06.07 - 07.14
- xDrive 35 i, xDrive 50 i, ActiveHybrid, xDrive 30 d, xDrive 35 d, xDrive 40 d
- X5 (F15, F85) 08.13 - 07.18
- xDrive 28 i, xDrive 35 i, sDrive 35 i, xDrive 40e, xDrive 50 i, sDrive 25 d, xDrive 25 d, xDrive 30 d, xDrive 40 d
- X6 (F16, F86) 08.14 - 07.19
- sDrive 35 i, xDrive 35 i, xDrive 50 i, xDrive 30 d, xDrive 40 d
Key details
| Part number | 40-221595 |
| Range | Bilstein B3 Air Spring |
| Fitting position | Rear axle |
| Spring design | Air spring |
| EAN | 4025258738716 |
| UPC | 651860740010 |
Compatibility check
We verify fitment before dispatch. Enter your UK registration or the last 7 of your VIN at checkout and we will confirm compatibility for your BMW X5 or X6 rear air suspension spring.
Installation and fitting
Professional installation is recommended for all air suspension components. For supply and fitting, choose Nforcd in Warwickshire. Email Sales@nforcd.com for a fitting quote and booking.
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