This procedure covers the removal and replacement of the airbag control module (ACM) on a 2025 Rivian EDV 500, including proper disarming of the supplemental restraint system and post-installation calibration.

Warnings

Tools required

Parts

• Airbag control module (ACM) × 1 — Use OEM specification
• Module mounting bracket (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and ensure transmission is in Park
2. Turn off all vehicle systems and remove key fob from vehicle interior (place at least 30 feet away)
3. Verify high-voltage system is in service mode following Rivian service procedures
4. Disconnect 12V auxiliary battery negative terminal and secure away from battery post
5. Wait minimum 3 minutes for airbag system capacitor discharge
6. Put on anti-static wrist strap and connect to vehicle chassis ground point
7. Use scan tool to document all existing fault codes in airbag system
8. Take photographs of center console area and visible harness routing for reference

Procedure

1. 1

   Access center console area
   Remove the center console lower trim panel by releasing the clips at the rear edge and sliding rearward. Remove the front cupholders by lifting straight up. Remove the console side panels using a panel tool to release the retaining clips. The airbag module is located beneath the center console near the transmission tunnel.
2. 2

   Disconnect airbag harness connectors
   Locate the airbag control module beneath the console. Identify all harness connectors (typically 2-3 large multi-pin connectors). Carefully release each connector locking tab by pressing the release mechanism while gently pulling the connector straight off. Note the yellow color coding on SRS connectors. Do not pull on wires. Label each connector position with tape if needed.
   ⚠Never pull on wires when disconnecting connectors. Always pull on the connector body itself to avoid damaging terminals.
3. 3

   Remove module mounting hardware
   Locate the mounting bolts securing the airbag module to the bracket (typically 3-4 Torx bolts). Remove all mounting bolts and carefully lift the module away from the mounting surface. Support the module weight to prevent it from falling or being suspended by harness connectors.
4. 4

   Inspect mounting bracket and connectors
   Examine the mounting bracket for cracks, deformation, or damage. Inspect all connector pins in both the vehicle harness and on the removed module for corrosion, bending, or damage. Check harness for chafing, cuts, or signs of water intrusion. Replace bracket if any damage is found.
5. 5

   Prepare new airbag module
   Remove the new airbag module from its protective packaging. Keep the module in its anti-static bag until ready to install. Verify the part number matches the original module or Rivian service documentation. Inspect new module connectors for proper pin alignment and no shipping damage.
6. 6

   Install new airbag module
   Position the new module in the mounting bracket, ensuring proper orientation (connectors should face toward vehicle harnesses). Install mounting bolts hand-tight first to verify alignment, then tighten in a cross pattern. Since no torque specification is provided in the database, tighten securely but do not over-torque the mounting hardware.
7. 7

   Connect harness connectors
   Connect each harness connector to the corresponding port on the new module. Match connector positions to your reference photos. Push each connector firmly until you hear and feel the locking tab click into place. Gently tug on each connector to verify it is fully seated and locked.
8. 8

   Reconnect 12V battery
   Reconnect the 12V auxiliary battery negative terminal. Ensure the connection is clean and tight. Do not attempt to start the vehicle or energize systems yet.
9. 9

   Configure and calibrate module
   Connect the Rivian-compatible scan tool to the OBD-II port. Access the airbag system module and perform the configuration/initialization procedure as specified by Rivian service software. This typically includes VIN registration, sensor calibration, and system parameter programming. Follow all on-screen prompts exactly.
   ⚠️Module calibration is MANDATORY. The airbag system will not function properly without proper configuration and may fail in a collision or deploy unexpectedly.
10. 10

    Clear diagnostic codes and verify system
    Use the scan tool to clear all airbag system diagnostic trouble codes. Cycle the ignition off, wait 10 seconds, then turn ignition to ON position (do not start vehicle). Observe the airbag warning light on the instrument cluster - it should illuminate for approximately 6 seconds then turn off. Use scan tool to verify no active or pending codes remain.
11. 11

    Perform system self-test
    Using the scan tool, initiate a complete airbag system self-test. Verify all airbag sensors, seat belt pretensioners, and deployment circuits pass testing. Address any failures before proceeding. Document all test results.
12. 12

    Reinstall console components
    Reinstall center console panels, side trim, and cupholders in reverse order of removal. Ensure all clips engage properly and panels fit flush. Verify no harnesses are pinched or routed incorrectly. Check that all interior trim is secure.

Reassembly

1. Verify all console trim pieces are properly secured with no gaps or loose clips
2. Ensure no tools or parts were left in the console area
3. Remove anti-static wrist strap
4. Return high-voltage system to normal operating mode per Rivian procedures

Verification

• Turn ignition to ON position and verify airbag warning light illuminates briefly then extinguishes (approximately 6 seconds)
• Use scan tool to confirm zero active or pending diagnostic trouble codes in airbag system
• Verify all airbag system components show as present and communicating in scan tool data
• Perform a test drive in a safe area and verify no warning lights illuminate
• Re-scan system after test drive to confirm no new codes have set
• Document completion with scan tool report showing successful calibration and no faults

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