Bilstein 44-156251 Air Suspension Strut - Front

Bilstein B4 OE Replacement (Air) Front Strut

The Bilstein B4 OE Replacement (Air) front strut is built for Mercedes-Benz air suspension applications that need a direct-fit replacement with original connector compatibility. This Bilstein Shock Absorbers part restores the factory ride feel while matching the vehicle’s air suspension layout.

Part number 44-156251 is part of the Bilstein B4 OE Replacement (Air) line, a series focused on OE-style air suspension replacement for European vehicles. Bilstein supplies air suspension systems at the OE level, and this product is engineered to meet the standards expected for factory replacement on the listed Mercedes-Benz models.

Key Features

• Bilstein B4 OE Replacement (Air) series for factory-style air suspension service
• Front air suspension strut for Mercedes-Benz ML350, ML550, ML320, ML500, and GL320 applications
• Direct connection to original vehicle connectors for modification-free installation
• Monotube internal design for consistent damping response
• Black paint finish with reservoir and special upper mount type
• Lower mount type: clevis

Detailed Description

Bilstein 44-156251 is an air suspension strut designed for front suspension service on 2006-2011 Mercedes-Benz ML350, 2007-2009 Mercedes-Benz ML320, 2007 Mercedes-Benz ML500, 2008-2011 Mercedes-Benz ML550, and 2007 Mercedes-Benz GL320 with electronic suspension. It is built to replace the original air suspension unit and connect directly into the factory system, helping preserve the original driving characteristics of the vehicle.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. If you are searching for a front air suspension strut for Mercedes-Benz ML350 or a Bilstein 44-156251 replacement for Mercedes-Benz GL320 front suspension, this OE-style unit matches the listed factory applications.

What It Helps Address

• Front-end sag from a worn air suspension strut
• Uneven ride height on Mercedes-Benz ML-Class and GL-Class vehicles
• Noisy or inconsistent damping from a failing OE air damper
• Loss of factory ride quality in air suspension-equipped models
• Need for a direct replacement without connector modification

Installation Notes

Verify the vehicle’s year, model, and suspension configuration before ordering. This front strut is listed for 2006-2011 Mercedes-Benz ML350, 2007-2009 Mercedes-Benz ML320, 2007 Mercedes-Benz ML500, 2008-2011 Mercedes-Benz ML550, and 2007 Mercedes-Benz GL320 with electronic suspension. Confirm the lower clevis mount and special upper mount style match the original part before installation.

For best results, inspect related air suspension components, connectors, and mounting points during replacement. Part number 44-156251 is intended for direct-fit service on the specified front applications.

Quality Assurance

Bilstein is an OE supplier for air suspension systems, and the B4 OE Replacement (Air) line is engineered to meet or exceed the standards associated with factory replacement parts. The design focuses on restoring original vehicle feel while maintaining direct-fit compatibility for the listed Mercedes-Benz applications.