This procedure covers the removal and replacement of electric motor mounts on the 2023 Rivian EDV 500 dual motor AWD platform, requiring support of powertrain components and access from underneath the vehicle.

Warnings

Tools required

Parts

• Electric motor mount assembly × 1 — Use OEM specification
• Motor mount hardware kit × 1 — Use OEM specification
• HV system interlock plug seal × 1 — Use OEM specification if disturbed

Preparation

1. Park vehicle on level surface and ensure parking brake is engaged
2. Disconnect 12V auxiliary battery negative terminal and wait 2 minutes
3. Access high voltage service disconnect located in front trunk area
4. Remove HV service disconnect plug and install lockout device per manufacturer safety protocol
5. Wait minimum 5 minutes for HV capacitor discharge
6. Raise vehicle on lift or support securely on jack stands at all four corners
7. Remove front and rear underbody shields to access motor mounts
8. Mark motor mount positions and orientation with paint pen for reference during installation

Procedure

1. 1

   Support the motor assembly
   Position a powertrain support fixture or transmission jack with wide wooden block under the motor housing. Apply upward pressure to just contact the motor without lifting it. Ensure support is stable and centered to prevent motor from shifting during mount removal.
2. 2

   Identify motor mount location
   Locate the motor mount requiring replacement. The EDV 500 has individual mounts for front and rear motors. Front motor mounts attach to subframe at forward position, rear motor mounts attach to rear subframe assembly. Verify which mount is being replaced and note routing of any electrical connectors or cooling lines near mount.
3. 3

   Disconnect interfering components
   If motor mount access is obstructed by coolant lines, carefully support lines and remove mounting brackets only as needed. Label any electrical connectors near the work area. For rear motor mounts, may need to disconnect driveshaft carrier bearing support. Do not disconnect coolant lines unless absolutely necessary.
4. 4

   Remove upper motor mount fasteners
   Remove the upper motor mount bolts connecting the mount to the motor housing. These typically use 15mm or 18mm fasteners. Support the motor with jack while removing these bolts. Count fasteners and inspect for any washers or spacers that must be reinstalled.
5. 5

   Remove lower motor mount fasteners
   Remove the lower motor mount bolts connecting the mount bracket to the subframe or chassis. These are typically larger diameter fasteners (18mm-21mm). Use breaker bar if needed. Note any alignment dowels or locating pins in the mount.
6. 6

   Remove motor mount assembly
   With all fasteners removed, carefully extract the motor mount assembly. May need to slightly raise or lower the motor using support jack to create clearance. Use pry bar gently if needed but do not pry against motor housing. Remove mount completely from vehicle and inspect surrounding areas for damage.
7. 7

   Inspect motor and mounting surfaces
   Examine motor housing mounting surface for cracks, damage, or elongated bolt holes. Check subframe mounting location for cracks or deformation. Inspect motor alignment relative to drivetrain components. Clean all mounting surfaces with brake cleaner and wire brush to remove corrosion and debris.
8. 8

   Prepare new motor mount
   Unpack new motor mount and verify it matches original design and orientation. Check that all mounting holes align with reference marks made during disassembly. Apply medium-strength thread locker to fastener threads per manufacturer specifications if required.
9. 9

   Install new motor mount assembly
   Position new motor mount into location, aligning with reference marks and any locating dowels. Adjust motor height using support jack to align bolt holes. Start all fasteners by hand before tightening any to ensure proper alignment.
10. 10

    Install and tighten lower mount fasteners
    Install lower mount-to-subframe bolts. Tighten in progressive sequence if multiple bolts present. Note: Specific torque values not available in database - refer to factory service manual for exact specifications. Typical range for these fasteners is 75-120 ft-lbs depending on size.
11. 11

    Install and tighten upper mount fasteners
    Install upper mount-to-motor housing bolts. Ensure motor is properly seated against mount before final tightening. Tighten in cross-pattern if applicable. Note: Specific torque values not available in database - refer to factory service manual. Typical range is 50-90 ft-lbs.
12. 12

    Reconnect interfering components
    Reinstall any coolant line brackets, electrical connector supports, or driveshaft carrier bearing that were removed for access. Verify coolant lines have proper clearance and are not contacting motor mount or being pinched.
13. 13

    Remove motor support
    Carefully lower transmission jack or remove powertrain support fixture, allowing motor weight to transfer to new mount. Verify motor settles into proper position and mount compresses evenly.

Reassembly

1. Reinstall front and rear underbody shields with all fasteners
2. Lower vehicle to ground
3. Remove HV lockout device and reinstall HV service disconnect plug with new seal if required
4. Reconnect 12V auxiliary battery negative terminal
5. Perform HV system integrity check per manufacturer procedure before driving

Verification

• Start vehicle and verify no warning lights related to high voltage system appear on instrument cluster
• With vehicle running, check for excessive motor vibration or abnormal noise
• Visually inspect motor mount for proper seating and alignment
• Test drive vehicle and verify no vibration, clunking, or motor movement under acceleration and deceleration
• Perform final inspection underneath vehicle to confirm all fasteners are tight and no components are contacting motor mount
• If available, use diagnostic scan tool to verify no drivetrain fault codes are present

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