Dorman 528-012 Suspension Trailing Arm - Rear Right

Rear Right Trailing Arm for Mazda 3

This Dorman trailing arm is a direct replacement for the rear right suspension position on select Mazda 3 and Mazda 3 Sport models. Built from steel with a coated finish, Dorman 528-012 is engineered to restore secure rear suspension geometry and predictable handling.

Key Features

• Direct replacement trailing arm for the rear right suspension
• Fits 2014-2018 Mazda 3, rear right
• Fits 2014-2018 Mazda 3 Sport, rear right
• Steel construction with black coated finish
• Rubber bushings included for suspension mounting points
• Bracket-to-bushing design with bolt-on attachment
• Stamped end construction
• Part number 528-012 for easy identification

Detailed Description

Dorman 528-012 is a suspension trailing arm designed as a direct OE-style replacement for the rear right side of the Mazda 3 and Mazda 3 Sport from 2014 through 2018. The steel body, coated finish, and included rubber bushings are selected to support stable rear suspension movement and consistent alignment behavior. If you are replacing a worn rear suspension trailing arm on a Mazda 3, this part number 528-012 provides a direct-fit service solution.

This part cross-references Mazda OE number B45A28200A for the same application.

What It Helps Address

• Rear suspension looseness or clunking from worn arm bushings
• Uneven rear wheel tracking caused by a damaged trailing arm
• Handling instability from suspension component wear
• Noise from deteriorated rubber mounting points
• Alignment issues related to rear suspension wear

Installation Notes and Tips

Verify rear right position and confirm vehicle fitment before installation. This trailing arm uses a bolt-on attachment and includes bushings, but mounting hardware is not included. Because suspension fasteners and bushing preload can affect ride height and alignment, professional installation and a post-installation alignment check are recommended. Confirm all mounting hole sizes and attachment points match the original component before service.

Quality Assurance

Dorman designs this trailing arm as a direct replacement and tests it for secure performance, smooth ride quality, and predictable handling. The part is engineered for passenger safety and evaluated through a rigorous validation process before release.