Delphi TC4725 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

OE-Style Front Left Lower Control Arm

Delphi TC4725 is a suspension control arm and ball joint assembly for the front left lower position on select Subaru applications. It is built with a stamped steel arm, pre-greased ball joint, and included bushings and dust boot for a direct replacement service part.

Compatible with 2019-2024 Subaru Crosstrek and 2019-2024 Subaru Forester, this Delphi TC4725 assembly is engineered around OE dimensional and material analysis for proper fitment and consistent steering response.

Key Features

• Part number: TC4725
• Front left lower suspension control arm and ball joint assembly
• Stamped steel construction with painted black finish
• Pre-greased ball joint with threaded stud
• Ball joint mounting type: press in
• Includes bushings, dust boot, castle nut, cotter pin, and mounting hardware
• Clockwise (right) thread direction
• Standard replacement grade
• No grease fitting and no greaseable service point

Detailed Description

Delphi TC4725 is a direct replacement suspension control arm assembly for the front left lower position on the Subaru Crosstrek and Subaru Forester. The stamped steel arm uses rubber bushings and a chloroprene rubber dust boot, while the pre-greased ball joint helps simplify service and restore factory-style suspension geometry. Delphi validates its OE-focused steering and suspension parts through dimensional and material analysis, along with environmental testing that includes extreme temperature exposure and extended salt spray testing.

This part cross-references MOOG Chassis Products RK623769 for the same application.

Common Repair Uses

• Front-end clunking or looseness from a worn lower control arm
• Uneven tire wear caused by suspension play
• Steering wander or reduced directional stability
• Ball joint wear at the front left lower suspension point
• Restoring proper alignment after suspension component replacement

Installation Notes and Tips

Install on the front left lower suspension position only. Verify thread direction, mounting hole alignment, and ball joint stud engagement before final tightening. Because this assembly is not adjustable, a professional wheel alignment is recommended after installation on 2019-2024 Subaru Crosstrek and 2019-2024 Subaru Forester applications.

Quality Assurance

Delphi applies OE-based engineering and testing to its aftermarket steering and suspension portfolio. TC4725 is built to meet standard replacement expectations with attention to fit, material compatibility, and durability under demanding temperature and corrosion conditions.