Dorman 538-771 Suspension Ball Joint - Front Lower Rear Outer

Dorman 538-771 Suspension Ball Joint

Dorman 538-771 is a threaded suspension ball joint built as a direct replacement for the original equipment on select Mercedes-Benz models. It is precision-engineered and tested for reliable service in the front lower rear outer knuckle position.

Key Features

• Threaded, press-in suspension ball joint for OE-style replacement
• Steel construction with a grey finish
• Dust boot included to help protect the joint from contamination
• Premium suspension grade type
• Mounting hardware included
• Tapered stud design with 12 mm wrench size
• Cross-references MOOG Chassis Products K500168 and Beck/Arnley 101-5893 for the same application

Detailed Description

This Dorman suspension ball joint, part number 538-771, is made for specific Mercedes-Benz E-Class and CLS-Class applications where the front lower rear outer knuckle ball joint is serviced. The steel body, threaded design, and press-in mounting style support a precise OE-style fit, while the included dust boot helps shield the joint from road debris and moisture. It is a practical replacement for worn suspension hardware on Mercedes-Benz E320, E350, E500, E550, E55 AMG, E63 AMG, CLS350, CLS500, CLS550, CLS63 AMG, and related models listed below.

Vehicle Fitment

• Fits 2007-2011 Mercedes-Benz CLS350, front lower rear outer
• Fits 2005-2011 Mercedes-Benz CLS500, front lower rear outer
• Fits 2007-2011 Mercedes-Benz CLS550, front lower rear outer
• Fits 2007-2011 Mercedes-Benz CLS63 AMG, front lower rear outer
• Fits 2007-2009 Mercedes-Benz E280, front lower rear outer
• Fits 2003-2009 Mercedes-Benz E320, front lower rear outer
• Fits 2006-2009 Mercedes-Benz E350, front lower rear outer
• Fits 2003-2009 Mercedes-Benz E500, front lower rear outer
• Fits 2007-2009 Mercedes-Benz E550, front lower rear outer
• Fits 2007-2009 Mercedes-Benz E63 AMG, front lower rear outer
• Fits 2006 Mercedes-Benz CLS55 AMG, front lower rear outer
• Fits 2003-2006 Mercedes-Benz E55 AMG, front lower rear outer

Common Issues This Part Can Address

• Front suspension looseness or play at the knuckle
• Clunking or knocking noises over bumps
• Uneven tire wear caused by worn ball joint movement
• Steering instability or vague road feel
• Visible dust boot damage or joint contamination

Installation Notes and Tips

Confirm the vehicle’s front lower rear outer knuckle application before ordering, since this part number is specific to select Mercedes-Benz chassis configurations. Press-in installation requires proper suspension service tools and careful alignment of the tapered stud and threaded joint during assembly. Always inspect adjacent control arm and knuckle components for wear before completing the repair.

Quality Assurance

Dorman engineers this replacement ball joint to match the original equipment application on the listed vehicles and subjects it to testing for dependable fit and function. The premium suspension grade construction and included dust boot support long-term service in demanding front suspension use.