Delphi TC3831 Suspension Control Arm and Ball Joint Assembly - Front Left Lower Rearward

Front Left Lower Rearward Control Arm Assembly

Delphi TC3831 is a suspension control arm and ball joint assembly for the front left lower rearward position. It is built for Audi applications that require OE-style fit and consistent steering and suspension response.

Compatible with select Audi A4, A4 allroad, A4 Quattro, A5 Quattro, A5 Sportback, S4, S5, S5 Sportback, RS5, and RS5 Sportback models, this part number is a direct-fit replacement for the front left lower rearward location. Delphi applies OE dimensional and material analysis to support proper compatibility between the original part and the aftermarket replacement.

Key Features

• Front left lower rearward suspension control arm and ball joint assembly
• OE-focused fitment for Audi chassis applications
• Engineered for the front left lower rearward position
• Tested for temperature extremes below -40 C and above 120 C
• Exposed to 720 hours of salt spray during validation
• Delphi part number TC3831 for catalog and cross-reference use

Detailed Description

Delphi TC3831 is a suspension control arm and ball joint assembly developed for Audi front suspension service where precise geometry matters. It serves the front left lower rearward position on 2016-2024 Audi A4 and A4 Quattro, 2017-2024 Audi A4 allroad, 2018-2024 Audi A5 Quattro and A5 Sportback, 2018-2023 Audi S4, S5, and S5 Sportback, plus 2018-2023 Audi RS5 and RS5 Sportback applications listed in the fitment data. Delphi uses OE-based dimensional and material analysis to help maintain proper part compatibility and suspension alignment characteristics.

This part cross-references MOOG Chassis Products RK623724 for the same application.

Common Repair Uses

• Restoring front suspension geometry after wear in the lower rearward arm
• Addressing looseness or play in the front left suspension
• Replacing a worn ball joint assembly on Audi A4, A5, S4, S5, or RS5 models
• Correcting clunks, vibration, or uneven tire wear linked to suspension wear
• Servicing OE-style front left lower rearward suspension components

Installation Notes and Tips

Verify the vehicle’s year, model, and front left lower rearward position before ordering. This part is listed for specific Audi A4, A4 allroad, A4 Quattro, A5 Quattro, A5 Sportback, S4, S5, S5 Sportback, RS5, and RS5 Sportback applications, so match the original suspension layout carefully. After installation, a professional wheel alignment is recommended to confirm suspension geometry and steering response.

Quality Assurance

Delphi validates this steering and suspension component through extreme-temperature testing and extended salt-spray exposure to evaluate durability in demanding conditions. The brand also applies OE expertise and dimensional analysis to support fit and material compatibility for aftermarket service.