Bilstein B3 Rear Air Spring 40-221595 for BMW X5 X6 E70 E71 E72 F15 F16 F85 F86 OE Replacement Rear Axle Air Suspension Bag/Bellow

Bilstein 40-221595 Rear Pneumatic Spring for BMW X5 and X6

Restore that crisp BMW ride with the Bilstein B3 rear pneumatic spring, part number 40-221595. This high-quality, direct-fit unit is engineered for models with rear self-levelling suspension, bringing back correct height control, smooth compliance and dependable support under load. Ideal for fixing a sinking rear end, uneven stance or an overworked compressor on your X5 or X6.

Why it is a smart upgrade

• OE-level fit and performance for factory driving feel
• Consistent rear height and stability when carrying passengers or luggage
• Precise, quiet operation for long-distance comfort
• Trusted Bilstein engineering for durability and reliability

We have installed this Bilstein B3 unit on customer cars and our own projects. Feedback is consistently positive, with owners praising the restored stance, comfort and confidence on British roads.

Vehicle applications

Rear axle pneumatic spring for BMW X5 and X6 with rear self-levelling where the spring and damper are separate components:

• BMW X5 E70
• BMW X6 E71 and E72
• BMW X5 F15 and X5M F85
• BMW X6 F16 and X6M F86

Perfect for standard suspension and performance variants that use a separate rear air bellow and shock absorber.

Key details

Common symptoms this part cures

• Rear corner drops overnight or after parking
• Compressor running frequently to maintain height
• Harsh ride, rear-end bounce or instability with passengers
• Warning messages related to self-levelling

Fitment check

We verify compatibility before dispatch. Add your UK registration or the last 7 of your VIN at checkout and we will confirm the correct rear pneumatic spring for your BMW X5 or X6.

Professional fitting

Installation of air suspension components should be carried out by experienced technicians. For supply and fitting, choose MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and booking.

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