Dorman 521-501 Suspension Control Arm - Rear Left Upper Rearward

Dorman 521-501 Rear Left Upper Control Arm

This Dorman suspension control arm is a direct replacement for the rear left upper rearward position on select Mercedes-Benz models. Built with an aluminum body, coated finish, and rubber bushings, it is engineered and tested to replace the original equipment control arm on the specified applications.

Key Features

• Direct replacement suspension control arm for the rear left upper rearward position
• Aluminum construction with casting/forged design for OE-style fit and function
• Coated black finish for added surface protection
• Rubber bushing included with black bushing color
• Threaded ball joint stud type with welded ball joint mounting type
• No ball joint installed and no mounting hardware included
• Part number 521-501 for easy identification

Detailed Description

Dorman 521-501 is a suspension control arm designed for Mercedes-Benz rear suspension service where the original arm has worn bushings, loosened joints, or developed handling noise. It uses an aluminum body with a 262.5 mm overall length, a press-in end 2 type, and a rubber bushing with a 14.3 mm inside diameter and 39.6 mm outside diameter. This part cross-references Delphi TC1949 for the same application. It is a practical replacement for Mercedes-Benz CLS550, CLS63 AMG, SL550, CLS350, CLS500, E320, E350, E550, E63 AMG, CLS55 AMG, E500, and SL500 applications in the rear left upper rearward position.

Vehicle Fitment

• Fits 2007-2011 Mercedes-Benz CLS550, Rear Left Upper Rearward
• Fits 2007-2011 Mercedes-Benz CLS63 AMG, Rear Left Upper Rearward
• Fits 2007-2011 Mercedes-Benz SL550, Rear Left Upper Rearward
• Fits 2007-2009 Mercedes-Benz CLS350, Rear Left Upper Rearward
• Fits 2006-2009 Mercedes-Benz CLS500, Rear Left Upper Rearward
• Fits 2003-2009 Mercedes-Benz E320, Rear Left Upper Rearward
• Fits 2006-2009 Mercedes-Benz E350, Rear Left Upper Rearward
• Fits 2007-2009 Mercedes-Benz E550, Rear Left Upper Rearward
• Fits 2007-2009 Mercedes-Benz E63 AMG, Rear Left Upper Rearward
• Fits 2006 Mercedes-Benz CLS55 AMG, Rear Left Upper Rearward
• Fits 2003-2006 Mercedes-Benz E500, Rear Left Upper Rearward
• Fits 2003-2006 Mercedes-Benz SL500, Rear Left Upper Rearward

Common Repair Uses

• Rear suspension clunking or knocking from worn bushings
• Uneven rear tire wear caused by suspension geometry changes
• Loose or unstable rear-end handling on Mercedes-Benz E-Class and CLS models
• Restoring proper rear left upper rearward suspension alignment after component wear
• Replacing a damaged or corroded original control arm

Installation Notes and Tips

Verify the rear left upper rearward position before installation and compare the original arm length and bushing layout to the replacement part. Because mounting hardware is not included, reuse or source the correct fasteners as needed. A professional alignment is recommended after suspension component replacement to confirm proper rear geometry on Mercedes-Benz CLS and E-Class vehicles.

Quality Assurance

Dorman manufactures this control arm as a precision-engineered replacement and subjects it to rigorous testing for reliable OE-style service on the listed Mercedes-Benz applications. Part number 521-501 is built to meet the demands of routine suspension repair and replacement.