ASSY, SIDE MOTOR MNT, RSDU For 2012-2021 Tesla Model S/Model X | 1027591-00-D

1. Core Function Description

1. RSDU Lateral Secure Fixation: It acts as a dedicated lateral support for the right rear drive unit (RSDU), adopting a 3-point reinforced clamping structure to lock the RSDU in its factory lateral position. This prevents left-right displacement of the RSDU during sharp turns, sudden acceleration, or uneven road driving—avoiding friction damage to adjacent components such as the rear drive shaft, high-voltage wiring harness, and cooling pipeline.
2. Multi-Frequency Vibration Isolation: The assembly integrates a dual-layer composite damping structure (high-elasticity EPDM rubber + stainless steel buffer plate) that targets the 12-420Hz vibration range of Tesla’s RSDU. It absorbs over 86% of low-frequency hum (generated during steady highway driving) and high-frequency impact (caused by torque fluctuations during regenerative braking), significantly reducing rear-side noise transmitted to the cabin and restoring the vehicle’s original quiet driving experience.
3. Chassis Lateral Load Dispersion: With a "lateral stress distribution" design, it evenly distributes the RSDU’s lateral load (up to 800N during cornering) to 4 key chassis lateral load-bearing points. This avoids local stress concentration that could lead to chassis side beam deformation or rear suspension misalignment—ensuring long-term stability of the vehicle’s rear-end handling, especially during high-speed cornering.

2. Specification Parameter Table

3. Fault Judgment (Signs for Replacement)

• Rear Right Side Abnormal Noise: A continuous "squeaking" sound from the rear right during cornering or "rattling" during acceleration/braking—caused by worn damping rubber, detached buffer plates, or loose assembly connections.
• Visible Component Damage: The main bracket is bent, cracked, or has broken mounting lugs; the damping rubber is split, bulging, or has fallen off the bracket; the pre-assembled mounting sleeves are worn or deformed—all of which lead to loss of RSDU lateral support and vibration isolation functions.
• RSDU Lateral Misalignment: Uneven wear on the rear right tire (faster wear on the inner edge), a "pulling to the right" feeling when driving straight, or unstable rear-end handling during high-speed cornering—triggered by assembly deformation that shifts the RSDU laterally.
• Loose Fixing Bolts: Bolts connecting the assembly to the chassis or RSDU keep loosening (even after re-tightening), which is a sign of worn mounting holes or reduced structural stability of the assembly—posing risks of RSDU displacement during driving.

4. Advantages of Premium Brand-Grade (vs. Generic Products)

5. Installation Details

5.1 Package Contents

• 1× RSDU side motor mount assembly (1027591-00-D)
• 3× High-tensile fixing bolts (Tesla original-spec M12×1.75, pre-coated with anti-seize compound to prevent thread galling)
• 1× Torque specification card (recommended torque: 48±2Nm for chassis bolts, 52±2Nm for RSDU bolts—complies with Tesla service manual standards)
• 1× Anti-corrosion grease packet (for coating mounting points, enhancing long-term rust resistance)

5.2 Installation Tools Required

• Torque wrench (range: 0-150Nm, for precise bolt tightening)
• Socket set (14mm, 17mm—matches the size of fixing bolts)
• Hydraulic jack + heavy-duty jack stands (for lifting the vehicle’s rear end and supporting the RSDU)
• Wire brush + degreaser (for cleaning rust, oil, or debris from chassis and RSDU mounting surfaces)

5.3 Installation Precautions

1. Safety Preparation: Before disassembling the old assembly, lift the vehicle’s rear end with a hydraulic jack and secure it with jack stands—never rely solely on the jack to avoid the RSDU dropping and causing injury or component damage.
2. Disassembly Order: First remove the 2 bolts connecting the assembly to the RSDU, then the 1 bolt connecting it to the chassis; avoid pulling the assembly forcefully to prevent damage to nearby high-voltage cables or cooling hoses.
3. Cleaning Step: Use degreaser and a wire brush to thoroughly clean the mounting surfaces of the chassis and RSDU—ensure no rust, oil, or debris remains, as gaps can cause abnormal noise or loose connections after installation.
4. Torque Control: Use a calibrated torque wrench to tighten bolts to the recommended values; over-tightening may deform the bracket, while under-tightening leads to assembly looseness and RSDU vibration during driving.

6. After-Sales Support

• Warranty Service: Provides a 4-year/85,000-kilometer warranty (whichever comes first). During the warranty period, if the bracket bends/cracks (non-human damage) or the damping system fails prematurely, a free replacement assembly will be provided.
• Technical Assistance: Dedicated EV technicians are available via email or online chat to answer installation questions (e.g., RSDU lateral positioning, torque verification) and troubleshoot post-installation issues (e.g., rear right noise, handling instability).
• Compatibility Guarantee: If the assembly is incompatible with your 2012-2021 Model S/Model X (confirmed via VIN check), 7-day no-reason return is supported (product must be uninstalled and packaging intact).

7. Conversion Guidance