This procedure covers the removal and replacement of the electric motor mount(s) on the 2025 Rivian EDV 500 dual motor AWD configuration, requiring drivetrain support and partial disassembly.

Warnings

Tools required

Parts

• Electric motor mount assembly × 1 — Use OEM specification
• Motor mount fastener kit × 1 — Use OEM specification
• Subframe bolt set (if applicable) × 1 — Use OEM specification

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Disconnect 12V battery negative terminal
3. Access and disconnect high voltage battery system following Rivian HV safety lockout/tagout procedure
4. Wait minimum 5 minutes for HV system capacitor discharge
5. Raise vehicle and secure on jack stands at manufacturer-specified lift points
6. Remove front and rear skid plates and undertray panels as needed for access
7. Mark motor mount orientation and position with paint marker for proper reinstallation alignment
8. Inspect replacement motor mount for correct part number and any shipping damage

Procedure

1. 1

   Identify and access the faulty motor mount
   Determine which motor mount requires replacement (front motor or rear motor, driver or passenger side). Remove any heat shields, coolant lines, or wiring harnesses that obstruct access to the motor mount. Use zip ties or wire to secure components out of the way. Document routing of any removed components with photos.
2. 2

   Disconnect coolant lines if necessary
   If the motor mount is near or interferes with motor cooling system lines, place drain pan underneath and carefully disconnect coolant quick-connect fittings. Cap open lines immediately to prevent contamination and fluid loss. Note that some coolant loss (approximately 1-2 quarts) is normal during this procedure.
3. 3

   Position motor support jack
   Place transmission/motor support jack under the electric motor assembly with a wood block between jack pad and motor housing to protect the unit. Raise jack until it just contacts the motor and takes slight upward pressure, but do not lift the motor yet. Ensure jack is positioned to support the motor center of gravity.
4. 4

   Remove motor mount through-bolts
   Locate and remove the upper motor mount through-bolts that connect the mount to the subframe or body. These are typically 18mm or 21mm bolts. Apply penetrating oil if fasteners show corrosion. Use breaker bar if necessary. Keep fasteners organized and inspect for thread damage or stretching.
5. 5

   Remove motor bracket fasteners
   Remove the lower motor mount fasteners that connect the mount bracket to the electric motor housing. These may be different sizes than the upper bolts. Support the motor mount as you remove the final fastener to prevent it from falling.
6. 6

   Lower motor slightly and remove mount
   Carefully raise or lower the motor assembly using the support jack by 1-2 inches as needed to create clearance for motor mount removal. Work the old motor mount out of its position, using a pry bar gently if needed. Inspect the mounting surfaces on both the motor and subframe for damage, cracks, or excessive wear.
7. 7

   Prepare mounting surfaces
   Clean all mounting surfaces on the motor housing and subframe using a wire brush. Remove any rust, old thread locker, or debris. Inspect threaded holes for damage and chase threads if necessary. Ensure alignment dowels or pins (if equipped) are present and undamaged.
8. 8

   Install new motor mount
   Position the new motor mount into place, ensuring proper orientation matches the marks made during disassembly. Align any dowel pins or locating features. Start all fasteners by hand to ensure proper thread engagement before tightening any bolts.
9. 9

   Install and torque motor bracket fasteners
   Install the lower motor mount fasteners that connect to the motor housing. Follow Rivian torque specifications for these fasteners. Since torque specs are not available in the database, refer to the vehicle service manual or contact Rivian technical support. Typically these fasteners range from 50-90 ft-lb. Use proper tightening sequence if specified.
10. 10

    Install and torque upper mount fasteners
    With the motor properly positioned on the support jack, install and torque the upper motor mount through-bolts to subframe/body. Ensure the motor mount is properly seated before final torque. Apply thread locker if specified by manufacturer. Verify all fasteners are tight.
11. 11

    Remove motor support and verify positioning
    Carefully lower and remove the motor support jack. Visually inspect the motor mount installation to ensure the motor sits at the correct height and angle. Check for any binding or misalignment. The motor should rest naturally on all mounts without stress.
12. 12

    Reconnect coolant lines and refill system
    If coolant lines were disconnected, reconnect all quick-connect fittings ensuring they fully seat and lock. Add EV Battery/Motor Coolant as needed to bring system back to proper level. Burp cooling system according to Rivian procedure to remove air pockets.
13. 13

    Reinstall shields and undertray
    Reinstall all heat shields, wiring harnesses, and undertray panels in reverse order of removal. Ensure all fasteners are secure and no wiring is pinched or rubbing against sharp edges. Verify all components are properly routed and secured.
14. 14

    Reconnect electrical systems
    Reconnect the high voltage battery system following Rivian reconnection procedure. Verify HV interlock is properly seated. Reconnect the 12V battery negative terminal. Clear any diagnostic trouble codes that may have been stored during the repair.

Reassembly

1. Torque all fasteners to manufacturer specifications using proper sequence
2. Ensure all coolant connections are secure and system is properly filled and burped
3. Verify all wiring harnesses and shields are reinstalled in original positions
4. Double-check that no tools or parts were left in the vehicle underside

Verification

• Start vehicle and verify no warning lights related to drivetrain or HV system appear
• Listen for any unusual noises from the motor mount area during startup
• Perform a slow test drive and check for vibrations, clunks, or abnormal noises during acceleration and deceleration
• Verify motor mount is not contacting surrounding components during torque application
• Check for coolant leaks if cooling system was disturbed
• Scan for diagnostic trouble codes using Rivian diagnostic tool
• Consider having wheel alignment checked if steering feel has changed or if subframe was disturbed

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