Delphi TC4027 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

OE-Style Front Left Lower Control Arm

Delphi TC4027 is a front left lower suspension control arm and ball joint assembly built for precise steering response and stable front-end geometry. It is a direct-fit replacement for select Toyota Corolla and Toyota Matrix models from 2009-2013, with OE-focused materials and dimensional checks for consistent fit.

Fits 2009-2013 Toyota Corolla, front left lower. Fits 2009-2013 Toyota Matrix, front left lower.

Key Features

• Part number: TC4027
• Front left lower position
• Steel control arm with casting/forged construction
• Ball joint included with bolt-in mounting type
• Pre-greased design
• Bushings included with rubber bushing material
• Dust boot included with chloroprene rubber construction
• Mounting hardware included
• Premium grade replacement
• Clockwise (right) thread direction

Detailed Description

Delphi TC4027 is engineered as a suspension control arm and ball joint assembly for the front left lower position on 2009-2013 Toyota Corolla and 2009-2013 Toyota Matrix models. The assembly uses a steel arm with forged/cast construction, a threaded ball joint stud, and pre-installed bushings to support accurate suspension movement and front-wheel alignment. Delphi applies OE-level dimensional and material analysis to help ensure proper part-to-vehicle matching, and the component is tested across extreme temperature and salt-spray conditions to evaluate durability in demanding environments. This part cross-references MOOG Chassis Products RK641278 for the same application.

Common Problems This Part Can Address

• Clunking or knocking from the front suspension
• Excessive play in the lower control arm or ball joint
• Uneven tire wear caused by worn suspension geometry
• Loose or unstable steering feel at the front end
• Visible cracking or deterioration in control arm bushings

Installation Notes and Tips

Replace the assembly on the front left lower side only when the vehicle is properly supported and the suspension is unloaded. Because this is a complete control arm and ball joint assembly, verify fastener torque, bushing orientation, and steering/suspension alignment after installation. A professional wheel alignment is recommended after replacement on Toyota Corolla and Toyota Matrix applications.

Quality Assurance

Delphi builds this part using OE-focused engineering practices and validates materials and dimensions for aftermarket fitment. The component is exposed to temperature extremes below -40 degrees C and above 120 degrees C, along with extended salt-spray testing, to evaluate corrosion resistance and long-term durability.