Delphi TC3878 Suspension Control Arm - Front Left

Front Left Suspension Control Arm for Mini Cooper

Delphi TC3878 is a front left suspension control arm for select 2014-2020 Mini Cooper models. Built from stamped steel with a coated black finish, it includes rubber bushings and a threaded ball joint stud for OE-style suspension service on the Mini Cooper front left corner.

Delphi applies OE-focused dimensional and material analysis to help match the original part’s fit and function. This Delphi TC3878 control arm is tested for extreme temperature exposure and salt spray resistance to support long-term durability in demanding road conditions.

Key Features

• Front left suspension control arm for 2014-2020 Mini Cooper
• Stamped steel construction with coated black finish
• Rubber bushings included
• Ball joint included with threaded stud type
• Mounting hardware included
• Standard replacement grade for OE-style service
• Delphi TC3878 part number for easy identification

Detailed Product Overview

The Delphi TC3878 suspension control arm is engineered for the front left position on Mini Cooper applications. Its stamped steel construction and coated finish are selected to support strength and corrosion resistance, while the included bushings and ball joint help restore proper suspension geometry and steering response. For buyers searching for a front left control arm for Mini Cooper, Delphi TC3878 offers an OE-replacement solution backed by Delphi’s aftermarket steering and suspension expertise.

This part cross-references OE numbers 31 12 6 850 397 and 31126879841 for the same application.

What It Helps Fix

• Excessive front-end looseness or wandering
• Clunking or knocking from the front left suspension
• Uneven tire wear caused by worn suspension joints
• Steering pull or reduced directional stability
• Worn bushings or ball joint play in the front left control arm

Installation Notes and Tips

Install this control arm at the front left position only on the listed Mini Cooper applications. Verify alignment after replacement, since control arm service can affect camber and toe settings. Compare the original arm’s dimensions, mounting points, and ball joint style before installation to confirm proper match with the vehicle.

Quality Assurance

Delphi subjects its OE-style steering and suspension parts to temperature extremes below -40 degrees C and above 120 degrees C, along with 720 hours of salt spray exposure. Delphi TC3878 is built using OE-based dimensional and material analysis to support fitment consistency on 2014-2020 Mini Cooper front left applications.