
Bilstein 40-221618 BMW E53 B3 OE Replacement Rear Right Air Suspension Spring
Restore the factory ride, handling and comfort of your BMW X5 E53 with the Bilstein B3 Rear Right Air Suspension Spring, part number BILSTEIN-40-221618. This OE-quality replacement air spring is designed specifically for the offside rear (OSR) of the X5 E53 platform and delivers the reliable performance, constant ride height and long-term durability you expect from Bilstein. Ideal fix for a sagging rear corner, air leaks or frequent compressor running, this BMW X5 air suspension bag keeps your self-levelling suspension working as intended.
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Why choose this Bilstein B3 air spring?
- OE specification and fitment for BMW X5 E53 models for genuine factory-style ride and handling.
- Constant counter-pressure in the bellows for stable ride height and consistent damping under load.
- Rapid response to changing road and driving conditions for confident control.
- High power reserves engineered by Bilstein for safety, durability and longevity.
- Direct replacement air spring bag for the rear axle right side, perfect when air spring and shock absorber are separate units on the E53.
Proven on the road
We have fitted these Bilstein B3 air springs to customer BMW X5 E53 vehicles and the feedback has been excellent. Owners report a transformed ride, correct rear ride height, improved load handling and the return of that smooth, composed BMW feel.
What this part helps resolve
- Sagging or lowered rear right corner
- Uneven ride height or vehicle leaning
- Frequent compressor operation due to leaks
- Harsh ride from a failing or cracked air bag
Fitment and compatibility
Designed for BMW X5 E53 (2000 to 2006 approx.), including:
- 3.0i
- 4.4i
- 4.6is
- 4.8is
- 3.0d
Fitting position: Rear Axle Right (Offside). Spring design: Air Spring / Air Bag. Bilstein Series: B3.
Important notes
- This listing is for the rear right air spring only. Shock absorber and other components are not included.
- For the rear left side, see Bilstein 40-221601 BMW E53 B3 OE Replacement Rear Left Air Suspension Spring.
- For balanced performance, many owners choose to replace air springs in pairs.
Compatibility check
We will verify compatibility before dispatch. Simply provide your UK registration or the last 7 digits of your VIN at checkout and our team will confirm this Bilstein 40-221618 matches your BMW X5 E53.
Professional fitting
Professional installation is recommended. Nforcd offers fitting at our Warwickshire workshop. To request a quote or book your BMW X5 E53 air spring replacement, email Sales@nforcd.com.
Part numbers and identifiers
- Manufacturer: Bilstein
- Bilstein Part Number: 40-221618
- Nforcd SKU: BILSTEIN-40-221618
- EAN: 4025258727345
- UPC: 651860728216
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Order your Bilstein B3 Rear Right Air Suspension Spring today and bring back the confident, comfortable drive your BMW X5 E53 was built for.