Delphi TC9399 Suspension Control Arm and Ball Joint Assembly - Front Right Upper

Front Right Upper Control Arm Assembly

Delphi TC9399 is a front right upper suspension control arm and ball joint assembly for select Lexus performance sedans and coupes. It is built for direct replacement service on the front right upper position, with OE-focused dimensional and material analysis to support proper fit and suspension geometry.

Key Features

• Front right upper suspension control arm and ball joint assembly
• OE-based engineering for fitment and suspension alignment
• Tested for temperature extremes below -40 C and above 120 C
• Exposed to 720 hours of salt spray during validation
• Designed for Lexus IS300, IS350, IS500, RC F, RC300, RC350, GS F, GS350, GS300, GS450h, GS200t, and RC200t applications

Detailed Description

Delphi TC9399 is a suspension control arm and ball joint assembly for the front right upper position on select Lexus models, including the Lexus IS300, IS350, IS500, RC F, RC300, RC350, GS F, GS350, GS300, GS450h, GS200t, and RC200t. Delphi applies OE-level engineering practices to its aftermarket steering and suspension portfolio, using dimensional and material analysis to help maintain the correct relationship between the OE part and the replacement component. This part cross-references MOOG Chassis Products RK623970 for the same application.

Vehicle Fitment

• Fits 2021-2024 Lexus IS300, front right upper
• Fits 2021-2024 Lexus IS350, front right upper
• Fits 2022-2024 Lexus IS500, front right upper
• Fits 2015-2024 Lexus RC F, front right upper
• Fits 2018-2024 Lexus RC300, front right upper
• Fits 2015-2024 Lexus RC350, front right upper
• Fits 2016-2020 Lexus GS F, front right upper
• Fits 2013-2020 Lexus GS350, front right upper
• Fits 2018-2019 Lexus GS300, front right upper
• Fits 2013-2018 Lexus GS450h, front right upper
• Fits 2016-2017 Lexus GS200t, front right upper
• Fits 2016-2017 Lexus RC200t, front right upper

Common Issues This Part Addresses

• Front-end looseness or wandering caused by worn upper control arm components
• Clunking or knocking from the front right suspension
• Uneven tire wear related to suspension geometry wear
• Steering response changes from ball joint wear
• Alignment instability after suspension component deterioration

Installation Notes and Tips

Install on the front right upper suspension position only. After replacement, perform a professional wheel alignment to verify suspension angles and steering wheel center. Confirm vehicle application by year, model, and position before installation on Lexus IS300, IS350, IS500, RC F, RC300, RC350, GS F, GS350, GS300, GS450h, GS200t, and RC200t models.

Quality Assurance

Delphi validates this part through temperature cycling and extended salt-spray exposure to evaluate durability in demanding conditions. The brand’s OE background and material analysis process support consistent aftermarket replacement quality for part number TC9399.