Rear Upper Link Assembly 1027421-00-E / 1027426-00-C for Tesla Model X & Model S | Rear Axle Upper Control Arm OEM Replacement – COWIN China TOP-QUALITY Auto Parts Supplier

🛠️ Rear Upper Link Assembly – OEM 1027421-00-E & 1027426-00-C (Tesla Model X & S)

Eliminate rear-end clunking, rear steering vagueness, uneven rear tire wear and alignment drift with the COWIN OEM-Standard Rear Upper Link Assembly.
Precision-manufactured to match Tesla 1027421-00-E (Right) and 1027426-00-C (Left) specifications, these upper links are a critical part of the multi-link rear suspension,
maintaining correct rear wheel geometry, improving ride stability and handling precision with direct bolt-on fitment for both Model X and Model S platforms.

Principales características y ventajas

• Ajuste OEM: Direct replacement for 1027421-00-E / 1027426-00-C and all cross-referenced part numbers (-00-A, -00-B, -00-D variants).
• Cobertura del vehículo: Tesla Model S (2012–2023+ all trims including Plaid) & Tesla Model X (2015–2023+ all trims including Plaid).
• Side-Specific: RH = 1027421-00-E, LH = 1027426-00-C — different part numbers per side; please confirm side before ordering.
• Multi-Link Critical Component: The rear upper link controls camber and toe characteristics under load for stable high-speed handling.
• Construcción duradera: Forged aluminum alloy arm + heat-treated ball stud + anti-rust coating (≥120h salt spray test).
• Montaje completo: Supplied with pre-pressed bushings, ball joints and mounting hardware for full service replacement.
• 100% Tested: Validated for fatigue (1,000,000 cycles), alignment geometry and NVH (noise, vibration, harshness) under load.

🚗 Compatibilidad con vehículos

⚙️ Especificaciones técnicas

• Producto: Rear Upper Link Assembly / Rear Upper Control Arm (Sold Individually Per Side)
• Estado: Brand NEW
• OE Part Number (RH): 1027421-00-E, 1027421-00-A, 1027421-00-B, 1027421-00-D
• OE Part Number (LH): 1027426-00-C, 1027426-00-A, 1027426-00-B
• Cross Reference: 1043959-00-A, 6007999-00-A, 6007999-00-B, 6007999-00-C
• Lateral: Side-Specific — LH (1027426-00-C) ≠ RH (1027421-00-E)
• Material: High-Strength Forged Aluminum Alloy
• Bushing: Premium Rubber / PU Bushing (Pre-installed)
• Ball Joint: Included & Pre-pressed
• Tratamiento de la superficie: Epoxy Coating / Anodized + Anti-Corrosion (≥120h Salt Spray)
• Instalación: Direct Bolt-On / Plug & Play
• Hardware: Included (Mounting Bolts as applicable)
• Calidad: 100% Dimensional & Fatigue Tested (IATF16949 Process)

🛠️ Nota de instalación

Professional installation is strongly recommended due to suspension safety criticality.
Support the vehicle securely on a lift or jack stands before disassembly; enable Jack Mode on the touchscreen (Controls > Service > Jack Mode).
Important: LH (1027426-00-C) and RH (1027421-00-E) are different parts — confirm correct side before installation.
Use proper torque specifications for all upper link mounting bolts (refer to Tesla service manual for exact values, typically ~100–120 Nm for subframe bolts).
Final tightening should be performed at ride height (vehicle on ground or suspension loaded) to prevent premature bushing wear and alignment shift.
Mark original eccentric washer / cam bolt positions before disassembly to aid in preliminary alignment setup.
A full 4-wheel alignment must be performed after installation to set correct rear camber and toe angles.
Recheck hardware torque after initial 100 miles (160 km) of driving.
Note: The rear upper link is a key determinant of rear camber behavior under load — any play or bushing degradation will directly affect tire wear and high-speed stability.

🏭 ¿Por qué elegir COWIN Auto Parts?

COWIN (Gaoyun) is a professional Chinese manufacturer and supplier of high-precision automotive chassis & suspension components.
Our Tesla Model S/X rear upper link assemblies are produced under IATF16949-certified processes, with CNC machining, robotic welding
and rigorous fatigue testing to meet or exceed OEM durability standards for global EV aftermarket clients.