Rear Upper Link Assembly 1027421-00-E for Tesla Model S 2012–2020 & Model X | Rear Axle Upper Control Arm LEFT & RIGHT Compatible – COWIN China TOP-QUALITY Auto Parts Supplier

🛠️ Rear Upper Link Assembly – OEM 1027421-00-E (Tesla Model S 2012–2020 & Model X)

Eliminate rear-end clunking, uneven tire wear, sloppy handling and alignment drift with the COWIN OEM-Standard Rear Upper Link Assembly (1027421-00-E).
Precision-manufactured to match Tesla rear suspension specifications, this upper control arm maintains correct rear wheel geometry,
improves ride stability and handling precision with direct bolt-on fitment for Model S and Model X platforms.

✅ Key Features & Benefits

• OEM Fitment: Direct replacement for 1027421-00-E and cross-referenced part numbers (-00-A, -00-B, -00-C variants).
• Both Sides Same Part: Symmetrical design fits Rear Left (LH) AND Rear Right (RH) – no need to distinguish side-specific part numbers[1,8](@ref).
• Vehicle Coverage: Tesla Model S (2012–2020 all trims) and compatible Model X variants (2015–2020)[3,8](@ref).
• Durable Construction: Forged aluminum alloy arm + heat-treated ball stud + anti-rust coating (≥120h salt spray test).
• Complete Assembly: Supplied with pre-pressed bushings, ball joint 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.

🚗 Vehicle Compatibility

⚙️ Technical Specifications

• Product: Rear Upper Link Assembly / Rear Upper Control Arm (Sold Individually)
• Condition: Brand NEW
• OE Part Number: 1027421-00-E
• Cross Reference: 1021418-00-A, 1021418-00-B, 1021418-00-C, 1027426-00-C, 6006719-00-B[1,4](@ref)
• Side: Both Sides (LH + RH Symmetrical / Interchangeable)
• Material: High-Strength Forged Aluminum Alloy
• Bushing: Premium Rubber / PU Bushing (Pre-installed)
• Ball Joint: Included & Pre-pressed
• Surface Treatment: Epoxy Coating / Anodized + Anti-Corrosion (≥120h Salt Spray)
• Installation: Direct Bolt-On / Plug & Play
• Hardware: Included (Mounting Bolts as applicable)
• Quality: 100% Dimensional & Fatigue Tested (IATF16949 Process)

🛠️ Installation Note

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).
This part fits BOTH rear left and right sides – confirm quantity (2 pcs recommended per axle) before ordering.
Use proper torque specifications for all upper link mounting bolts (refer to Tesla service manual for exact values, typically ~100–120 Nm for large chassis bolts).
Final tightening should be performed at ride height (vehicle on ground or suspension loaded) to prevent premature bushing wear and geometry 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.

🏭 Why Choose 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.