J.C. Whitney RT28390004 Tesla Model X Rear Left Suspension Knuckle OEM Replacement Silver Aluminum

The J.C. Whitney RT28390004 is an OEM-replacement rear left (driver side) suspension knuckle designed for the Tesla Model X. Constructed from lightweight, high-strength aluminum with a silver finish, this knuckle serves as the central hub carrier in the rear suspension system, connecting the wheel hub, control arms, toe links, stabilizer bar link, brake caliper, and ABS wheel speed sensor into a single structural assembly.

The rear suspension knuckle is a critical component that maintains proper wheel alignment geometry and bearing load transfer. When the original knuckle is damaged due to collision, corrosion, or suspension impact, replacement with a properly spec'd part is essential to restore handling precision and tire wear characteristics.

Key Features:

• OEM Cross-Reference: Replaces Tesla part number 1027411-00-D
• Material: Aluminum construction for lightweight strength and corrosion resistance
• Finish: Silver
• Position: Rear, Left (Driver Side / LH)
• Production Date Range: Fits vehicles produced from September 2015 to February 2021
• Mounting points for upper and lower control arm links, toe link, and stabilizer bar link
• Provisions for ABS wheel speed sensor bracket and brake caliper mounting
• Hub bolt pattern compatible with OEM Tesla Model X rear hub assembly

A wheel alignment check is recommended following installation of this knuckle to ensure suspension geometry is within factory specifications.