Delphi TC3423 Suspension Control Arm - Rear Upper

Delphi Rear Upper Suspension Control Arm

Delphi TC3423 is a rear upper suspension control arm built for OE-style replacement on select Mercedes-Benz applications. It uses stamped steel construction with a black cataphoresis finish and rubber bushings to support stable rear suspension geometry and consistent camber control.

Compatible with Mercedes-Benz GLA250, B250, B250e, CLA250, and B Electric Drive applications, this Delphi rear upper control arm is built from dimensional and material analysis that helps match OE fit and function. Delphi also subjects its steering and suspension components to extreme temperature and salt-spray testing for durability in demanding road conditions.

Key Features

• Part number: TC3423
• Rear upper suspension control arm for select Mercedes-Benz vehicles
• Stamped steel construction for strength and consistent fit
• Black cataphoresis finish for added corrosion resistance
• Rubber bushings included in the arm design
• Standard replacement grade
• Non-adjustable design
• Position: rear upper and rear upper rearward, depending on application

Detailed Description

Delphi TC3423 is engineered as an OE-style suspension control arm for rear upper applications. It is a steel, stamped component with a regular-grade build and a cataphoresis coating that helps protect the part’s surface. The arm is supplied without a ball joint, mounting hardware, or bushings installed separately; the design uses rubber bushing material for suspension articulation and noise isolation.

This part cross-references Mevotech Supreme CMS101347 for the same application. It is a direct-fit option for Mercedes-Benz rear suspension service where camber arm replacement is needed, including Mercedes-Benz GLA250, CLA250, B250, B250e, and B Electric Drive models listed below. Delphi TC3423 is a practical choice when restoring rear suspension alignment and control arm integrity.

Vehicle Fitment

• Fits 2015-2020 Mercedes-Benz GLA250, rear upper, Camber Arm
• Fits 2013-2019 Mercedes-Benz B250, rear upper rearward
• Fits 2016-2017 Mercedes-Benz B250e, rear upper rearward
• Fits 2014-2016 Mercedes-Benz CLA250, rear upper, Camber Arm
• Fits 2014-2015 Mercedes-Benz B Electric Drive, rear upper, Camber Arm

Common Repair Uses

• Rear suspension noise from worn control arm bushings
• Excessive rear camber or alignment instability
• Clunking or looseness from a fatigued rear upper arm
• Uneven tire wear related to rear suspension geometry
• Restoration of OE-style rear suspension control

Installation Notes and Tips

Verify the vehicle’s rear upper or rear upper rearward position before ordering, since fitment varies by model. Inspect adjacent suspension components, alignment settings, and mounting points during replacement. Because mounting hardware is not included, reuse or replace fasteners as required by the vehicle service procedure.

Quality Assurance

Delphi applies OE engineering methods to its aftermarket steering and suspension portfolio, including dimensional and material analysis for fit consistency. The brand also tests components across extreme temperatures and extended salt-spray exposure to evaluate durability in harsh conditions.