Dorman 520-313 Suspension Control Arm - Rear Left Upper, Rear Right Upper or Rear Upper

Rear Upper Control Arm for Mercedes-Benz and INFINITI

Dorman 520-313 is a suspension control arm engineered as a direct replacement for the original equipment on select Mercedes-Benz and INFINITI models. It is built with a stamped steel construction, coated black for added corrosion resistance, and supplied with a rubber bushing already installed for a service-ready fit.

Key Features

• Stamped steel construction for OE-style strength and fit
• Black coated finish helps resist everyday road exposure
• Rubber bushing included with black bushing color
• Welded ball joint mounting type with threaded stud type
• No ball joint installed, allowing replacement of the arm assembly as specified
• Overall length: 262.5 mm
• Direct replacement for rear upper suspension service on select vehicles

Detailed Description

This Dorman suspension control arm, part number 520-313, is precision-engineered and tested for reliable OE replacement performance. It uses steel stamped construction with a coated finish and a welded ball joint mounting design, while the rubber bushing helps restore proper rear suspension geometry on vehicles such as the Mercedes-Benz GLA250, CLA250, B250, A200, and INFINITI QX30. This part cross-references Delphi TC3423 for the same application.

Compatible With rear upper suspension service on select Mercedes-Benz and INFINITI platforms, this control arm is a practical replacement when the original arm shows wear at the bushing or mounting points. The design supports factory-style installation on applications that use a press-in end and threaded ball joint stud interface.

What It Helps Address

• Rear suspension clunking from worn control arm bushings
• Uneven rear tire wear caused by loosened suspension geometry
• Excessive rear-end movement over bumps and rough pavement
• Handling instability from fatigued upper control arm components
• Inspection failures related to worn rear suspension linkage parts

Installation Notes and Tips

Fits 2014-2020 Mercedes-Benz GLA250, rear left upper and rear right upper; 2017-2019 INFINITI QX30, rear left upper and rear right upper; 2013-2019 Mercedes-Benz B250, rear left upper and rear right upper; 2013-2019 Mercedes-Benz CLA200, rear left upper and rear right upper; 2013-2019 Mercedes-Benz CLA250, rear left upper and rear right upper; 2014-2019 Mercedes-Benz GLA200, rear left upper and rear right upper; 2013-2018 Mercedes-Benz A200, rear upper; 2016-2018 Mercedes-Benz GLA180, rear left upper and rear right upper; 2016-2017 Mercedes-Benz B250e, rear left upper and rear right upper; 2015-2017 Mercedes-Benz CLA180, rear left upper and rear right upper; 2013-2016 Mercedes-Benz A180, rear upper; 2014-2015 Mercedes-Benz B Electric Drive, rear left upper and rear right upper; 2012-2015 Mercedes-Benz B180, rear left upper and rear right upper; 2013-2014 Mercedes-Benz A250, rear upper; and 2020 Mercedes-Benz GLA200, rear upper.

Before installation, verify the vehicle’s rear suspension position and compare the original arm length and bushing layout to part number 520-313. Because mounting hardware is not included, reuse or source the correct hardware as required by the vehicle application. A professional alignment is recommended after suspension work.

Quality Assurance

Dorman designs this control arm as a direct-fit replacement for specific OE applications and subjects it to testing for dependable service. The part is built to match the original style used on the listed Mercedes-Benz and INFINITI rear suspension applications.