Delphi TC9018 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Front Left Upper Control Arm Assembly

Delphi TC9018 is a front left upper suspension control arm and ball joint assembly for select Infiniti applications. It is built for direct replacement use on the front left upper position and supports OE-style steering and suspension geometry.

Compatible with 2011-2013 Infiniti M37, 2011-2013 Infiniti M56, 2012-2013 Infiniti M35h, 2014-2019 Infiniti Q70, and 2015-2019 Infiniti Q70L. Delphi TC9018 is a fitment-based replacement for drivers searching for a front left upper control arm for Infiniti Q70 and Infiniti M-series vehicles.

Key Features

• Front left upper suspension control arm and ball joint assembly
• Direct-fit replacement for select Infiniti rear-wheel-drive luxury sedans
• OE-focused dimensional and material analysis for application match
• Tested for temperature extremes from below -40°C to over 120°C
• Exposed to 720 hours of salt spray testing for corrosion resistance validation
• Delphi part number TC9018 for catalog and cross-reference lookup

Detailed Description

Delphi applies OE engineering knowledge to its aftermarket steering and suspension portfolio, and TC9018 follows that approach for the front left upper position. This assembly is intended for vehicles that need a precise suspension control arm and ball joint replacement to restore proper alignment geometry and front-end response. It cross-references Dorman OE Solutions 526-689 and Mevotech Supreme CMS301249 for the same application.

For shoppers comparing Infiniti Q70 front left upper control arm options, Delphi TC9018 provides a cataloged replacement path for 2014-2019 Infiniti Q70 and 2015-2019 Infiniti Q70L, along with 2011-2013 Infiniti M37, 2011-2013 Infiniti M56, and 2012-2013 Infiniti M35h.

What It Helps Address

• Front-end looseness or imprecise steering feel
• Uneven tire wear related to worn suspension geometry
• Clunking or knocking from the upper control arm area
• Alignment issues after suspension wear or component replacement
• Ball joint wear at the front left upper suspension position

Installation Notes and Tips

Verify year, model, and front left upper position before ordering. After installation, a professional wheel alignment is recommended to confirm suspension geometry and steering wheel centering. Inspect adjacent bushings, joints, and mounting points during service to avoid repeat repairs.

Quality Assurance

Delphi validates this part through temperature cycling and extended salt spray exposure, along with dimensional and material analysis to support OE-level fit and compatibility expectations. Delphi TC9018 is backed by the brand’s OE-focused engineering approach used across its steering and suspension line.