Bilstein B4 OE Replacement Air Rear Shock – 2001–2003 BMW 525i

Bilstein B4 OE Replacement Air Rear Shock – 2001–2003 BMW 525i is an application-specific Bilstein suspension solution for BMW 525i 2001-2003, 528i 1999-2000, 540i 1999-2003. For this road-focused application, the priority is controlled body motion and a composed ride without introducing unnecessary suspension changes. The exact Bilstein configuration should be matched to the vehicle's factory suspension equipment, especially where adaptive or air suspension is involved.

Why Bilstein B4 OE Replacement (Air) for This Application?

This B4 OE Replacement Air component is intended to restore the vehicle's original air-suspension function with an application-matched Bilstein replacement rather than converting the chassis to a conventional spring/damper layout. For the BMW application shown here, Bilstein assigns this product to Rear, so the part should be chosen by both chassis fitment and suspension position.

Application-Specific Product Details

• Bilstein Series: B4 OE Replacement (Air)
• Product Type:
• Application: BMW 525i 2001-2003, 528i 1999-2000, 540i 1999-2003
• Position: Rear
• Listed Shipping Weight: 6.02 lb
• Country of Origin: RO

Choosing the Right Bilstein Setup

For this road-focused application, the priority is controlled body motion and a composed ride without introducing unnecessary suspension changes. The exact Bilstein configuration should be matched to the vehicle's factory suspension equipment, especially where adaptive or air suspension is involved. If the vehicle has been lowered, lifted, converted from factory electronic suspension, or carries substantial added weight, verify that this exact Bilstein series and part number matches that configuration before purchase.

Bilstein Application Notes

• With Self-Leveling Suspension

Part Numbers & Configurations

Each selectable variant corresponds to the Bilstein part number shown above. Order the quantity required for the positions being serviced.