Westar CD-7731 Air Suspension Compressor

Westar CD-7731 Air Suspension Compressor

Westar CD-7731 is an air suspension compressor for Mercedes-Benz SUVs that need OE-style air supply performance for the suspension system. It is built as a new unit, not a remanufactured compressor, and is intended for drivers replacing a worn compressor on GL-Class and ML-Class applications.

Key Features

• Designed to meet or exceed OEM specifications for quality, fit, and function
• New compressor assembly; Westar does not sell remanufactured units
• Manufactured to strict industry standards, including ISO, QS, and TS processes
• Helps reduce replacement cost versus purchasing from the OEM dealership
• Fits select Mercedes-Benz GL450, GL500, GL550, GL350, ML350, ML450, ML550, ML63 AMG, GL320, ML320, and ML500 applications

Detailed Description

The Westar CD-7731 air suspension compressor is built for Mercedes-Benz air suspension systems that require consistent pressure delivery to maintain ride height and suspension operation. This part number is used across multiple GL-Class and ML-Class vehicles, including 2007-2012 Mercedes-Benz GL450, 2008-2012 GL500, 2008-2012 GL550, 2010-2011 GL350, 2003-2011 ML350, 2010-2011 ML450, 2008-2011 ML550, 2007-2011 ML63 AMG, 2007-2009 GL320, 2007-2009 ML320, and 2005-2007 ML500. This part cross-references Arnott Industries P-2594 and Dorman 949-911 for the same application.

What This Part Helps Address

• Vehicle sitting low from loss of air pressure
• Compressor running too often or for extended periods
• Slow suspension lift or delayed ride-height recovery
• Air suspension warning lights related to compressor performance
• Uneven stance on Mercedes-Benz GL-Class and ML-Class models

Installation Notes and Tips

Verify the vehicle’s exact model year and air suspension configuration before ordering. Confirm the compressor and dryer arrangement matches the original setup, especially on applications noted as compressor-dryer configurations. Inspect related air lines, relay, fuse, and suspension components during replacement to help avoid repeat failures. For best results, install on a clean, dry system and follow the vehicle service procedure for air suspension initialization.

Quality Assurance

Westar manufactures this compressor to strict industry standards and positions it as a new OE-style replacement for air suspension service. The CD-7731 is intended for buyers who want a direct replacement option for Mercedes-Benz GL450, GL550, and ML350 air suspension compressor service without choosing a remanufactured unit.