Bilstein 40-268446 Air Suspension Spring - Rear

Bilstein B3 OE Replacement Air Spring

Restore factory ride height and air suspension response with the Bilstein B3 OE Replacement (Air) spring, part number 40-268446. This black-painted air suspension spring is built for select Land Rover applications and connects directly to the original vehicle connectors for a modification-free replacement.

The B3 OE Replacement (Air) line is Bilstein’s OE-focused air suspension range for European vehicles. It is engineered to match the original air bag layout and restore the vehicle’s original feel after the factory air spring wears out.

Key Features

• Black paint finish
• Bilstein B3 OE Replacement (Air) series
• Direct-connect design for original vehicle connectors
• OE-style replacement for factory air suspension bags
• Built for select Land Rover rear suspension applications
• Part number 40-268446

Vehicle Fitment

• Fits 2017-2020 Land Rover Discovery, rear, with air suspension; B3 OE Replacement (Air).
• Fits 2013-2019 Land Rover Range Rover, rear; B3 OE Replacement (Air).
• Fits 2014-2019 Land Rover Range Rover Sport, rear, with or without electronic suspension; B3 OE Replacement (Air).

Detailed Description

Bilstein 40-268446 is an OE replacement air suspension spring for the rear of select Land Rover Discovery, Range Rover, and Range Rover Sport models. It is designed to replace the original air bag and reconnect to the factory system without modification, helping return the suspension to its original operating feel. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

For shoppers searching for a rear air suspension spring for 2017-2020 Land Rover Discovery, a rear air bag for 2013-2019 Range Rover, or a rear air suspension replacement for 2014-2019 Range Rover Sport, this Bilstein B3 OE Replacement (Air) unit provides a direct-fit solution. The 40-268446 part number is also useful when verifying the correct OE-style replacement before ordering.

Common Problems This Part Can Address

• Rear suspension sag from a worn air spring
• Loss of ride height after air bag deterioration
• Air suspension leaks at the original spring assembly
• Uneven rear stance on Land Rover air suspension vehicles
• Ride quality changes caused by a failing factory air bag

Installation Notes and Tips

Confirm rear fitment by model year and suspension configuration before installation. This part is designed to connect directly to the original connectors, which helps simplify replacement on supported Land Rover applications. Inspect the surrounding air suspension components, lines, and fittings during service to avoid replacing only one worn item in a system with multiple age-related issues.

Quality Assurance

Bilstein is an OE supplier for air suspension systems, and the B3 OE Replacement (Air) line is built to meet the standards expected for factory-style replacement on European vehicles. Part number 40-268446 is engineered as a direct replacement for the original rear air spring on the listed Land Rover applications.