Bilstein 40-303567 Air Suspension Spring - Rear

Bilstein B3 OE Replacement Air Spring

Bilstein B3 OE Replacement (Air) suspension air bag 40-303567 is built for select rear applications on BMW 5 Series xDrive models. It restores the original air suspension connection and ride feel with a direct-fit design that uses the vehicle’s original connectors.

As part of the Bilstein B3 OE Replacement (Air) line, this air suspension spring is focused on OE-style fitment for European vehicles. The black painted finish and direct replacement design support a clean installation on the rear suspension without modification.

Key Features

• Bilstein B3 OE Replacement (Air) air suspension spring
• Part number 40-303567
• Black painted finish
• Direct connection to original vehicle connectors
• OE-style replacement for select European vehicles
• Rear suspension application

Detailed Description

Bilstein 40-303567 is an air suspension spring designed for rear use on select BMW models, including the 2009-2010 BMW 535i xDrive rear and the 2008 BMW 535xi rear, plus the 2006-2007 BMW 530xi rear. It is engineered as an OE replacement air bag that restores the original suspension layout and feel while maintaining factory-style connector compatibility. For shoppers searching for a rear air suspension spring for BMW 535i xDrive, BMW 535xi, or BMW 530xi, this Bilstein B3 OE Replacement (Air) part provides a direct-fit solution.

Bilstein is an OE supplier for air suspension systems, and this product line is built to meet the standards expected for original-equipment replacement. The 40-303567 air spring is intended for vehicles with sports suspension and is finished in black paint for a clean, service-ready appearance.

What It Helps Solve

• Rear suspension sag on BMW 535i xDrive, 535xi, or 530xi models
• Loss of original ride height from a worn air spring
• Air suspension leaks at the rear spring assembly
• Ride quality changes caused by aging OE air bags
• Need for a direct replacement that connects to factory connectors

Installation Notes and Tips

Fits 2009-2010 BMW 535i xDrive, rear; Fits 2008 BMW 535xi, rear; Fits 2006-2007 BMW 530xi, rear. Verify the vehicle’s suspension configuration and rear application before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Bilstein supplies OE-level air suspension components, and the B3 OE Replacement (Air) line is built to match original connector layouts and factory replacement expectations for European vehicles.