Airbag - Side

This procedure covers the replacement of side airbag modules in the front seats of a 1994-2007 Dodge Ram 2500 with the 5.9L Cummins diesel engine.

Warnings

Tools required

Parts

• Side airbag module × 1 — Use OEM specification - Mopar only
• Seat trim panel clips × 1 — Replace any broken clips

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition to OFF position and remove key
3. Disconnect negative battery terminal first, then positive terminal
4. Wait minimum 2 minutes, then wait an additional 5 minutes for complete airbag system capacitor discharge (total 7 minutes)
5. Move front seat fully forward to access rear mounting bolts
6. Place fender covers on vehicle to protect paint during seat removal
7. Photograph airbag connector orientation and wire routing before disassembly
8. Ensure work area is clean and free of metal debris that could cause short circuits

Procedure

1. 1

   Remove seat lower mounting bolts
   Move seat fully forward. Locate and remove the two rear seat mounting bolts using the correct socket size for your seat hardware (verify against the vehicle service manual). Then slide seat fully rearward and remove the two front seat mounting bolts. These bolts secure the seat tracks to the floor pan.
   Torque spec

   Seat Mounting Bolts61 Nm (45 lb-ft)
2. 2

   Disconnect seat electrical connectors
   Locate the main seat wiring harness connector under the seat near the inboard track. Press the connector release tab and disconnect. If equipped with heated seats or power seats, disconnect those additional connectors as well. Note the routing of all wiring for reinstallation.
   ⚠Do not pull on wires. Always grasp the connector body when disconnecting.
3. 3

   Remove seat from vehicle
   With all electrical connections disconnected and mounting bolts removed, carefully lift the seat assembly out of the vehicle. Seat weighs approximately 50-70 lbs depending on options. Use proper lifting technique or get assistance. Place seat on a clean, protected workbench.
   ⚠Seat is heavy and awkward. Get assistance to avoid back injury or dropping the seat.
4. 4

   Remove seat back trim panel
   Locate the plastic trim panel on the outboard side of the seat back (side facing the door). Remove any visible screws or clips securing the panel. Carefully pry the panel away from the seat frame using trim tools, working from bottom to top. The side airbag module is mounted behind this panel.
   ⚠Trim clips break easily. Work slowly and use proper trim removal tools to minimize breakage.
5. 5

   Locate and access side airbag module
   With trim panel removed, locate the side airbag module mounted in a fabric pocket within the seat back frame. The module will be secured with Torx bolts and connected to the seat wiring harness. Identify the airbag connector, which will have a yellow or orange safety connector housing.
   ⚠️Ensure battery has been disconnected for at least 7 minutes total before proceeding. Never touch airbag connectors with battery connected.
6. 6

   Disconnect side airbag connector
   Locate the airbag connector with its distinctive yellow or orange housing. Press the connector release mechanism (usually a sliding lock or button) and carefully separate the connector. The connector contains a shorting bar that automatically shorts the airbag terminals when disconnected. Do not force or damage the connector.
   ⚠️Never probe or test airbag connector pins. The shorting bar must remain intact.
7. 7

   Remove side airbag module mounting bolts
   Using the appropriate Torx bit (typically T20 or T25), remove the bolts securing the side airbag module to the seat frame. There are typically 2-4 bolts. Keep track of any washers or spacers. Support the airbag module while removing the final bolt.
   Torque spec

   Side Airbag Module Bolts7 Nm (5 lb-ft)
8. 8

   Remove old airbag module
   Carefully remove the old side airbag module from the seat back pocket. Place the module on a secure surface with the airbag deployment side facing UP, away from people and workbench edges. Never place airbag face-down. If the airbag is deployed, handle it carefully as it may contain hot residue.
   ⚠️Always place removed airbag with deployment side facing UP. Never place face-down on any surface.
9. 9

   Inspect seat frame and wiring
   Inspect the seat frame mounting points for damage, cracks, or corrosion. Check the wiring harness for fraying, cuts, or damage. Inspect the airbag connector for bent pins or contamination. Clean mounting surfaces if necessary. Any damage to structural components or wiring requires repair before installing new airbag.
   ⚠Do not proceed with installation if seat frame is damaged or wiring is compromised. Structural integrity is critical for proper airbag function.
10. 10

    Install new side airbag module
    Remove new airbag module from packaging, keeping deployment side facing UP. Position the new module in the seat back pocket, aligning mounting holes with seat frame. Verify correct orientation by checking that the connector location matches the wiring harness routing.
    ⚠️Only use NEW OEM airbag modules. Never install used, rebuilt, or aftermarket airbags.
11. 11

    Install airbag module mounting bolts
    Install the Torx mounting bolts with any washers or spacers in their original positions. Thread bolts by hand first to ensure proper alignment. Using a torque wrench and appropriate Torx bit, torque bolts to specification in a cross-pattern if multiple bolts are present.
    ⚠️Proper torque is CRITICAL. Over-torquing can damage module. Under-torquing can allow movement during deployment. Use calibrated torque wrench.
    Torque spec

    Side Airbag Module Bolts7 Nm (5 lb-ft)
12. 12

    Connect side airbag connector
    Route the airbag connector to match the original path shown in your reference photos. Align the yellow or orange connector carefully and press together until you hear and feel a positive click. Verify the connector lock is fully engaged. Gently tug to confirm connection is secure.
    ⚠Connector must fully click into place. A partial connection will cause airbag warning light and system failure.
13. 13

    Reinstall seat back trim panel
    Position the trim panel over the airbag module, ensuring no wires are pinched. Press panel firmly into place to engage all clips. Install any screws removed during disassembly. Verify panel is secure and sits flush with no gaps.
    ⚠Ensure no wiring is pinched between trim panel and seat frame. Pinched wires can cause shorts or airbag deployment issues.
14. 14

    Reinstall seat in vehicle
    Carefully lift seat and position it over the mounting points in the vehicle. Align seat tracks with floor mounting holes. Install all four seat mounting bolts finger-tight first, then torque to specification using a cross-pattern (front-left, rear-right, front-right, rear-left).
    ⚠️Seat mounting bolts are SAFETY CRITICAL. Improper torque can result in seat detachment during collision. Use calibrated torque wrench.
    Torque spec

    Seat Mounting Bolts61 Nm (45 lb-ft)
15. 15

    Reconnect seat electrical connectors
    Reconnect all seat electrical connectors in reverse order of removal. Ensure each connector clicks fully into place. Verify wiring is routed away from seat tracks and cannot be pinched during seat movement.
    ℹ️Battery is still disconnected at this point. Do not reconnect battery yet.
16. 16

    Reconnect battery
    Reconnect the positive battery terminal(s) first, then the negative terminal(s) last. Note: the 5.9L Cummins uses dual batteries — ensure both are properly reconnected. Torque battery terminal bolts to specification. Do not over-tighten.
    Torque spec

    Battery Terminal Bolts7 Nm (5 lb-ft)
17. 17

    Clear airbag codes and verify system
    Turn ignition to ON position (do not start engine). Observe the airbag warning light on the instrument cluster. It should illuminate for approximately 4-8 seconds, then extinguish. If the light stays on or flashes, there is a fault code stored. Use a professional scan tool capable of reading airbag codes to retrieve and clear any codes. Cycle ignition off and on again to verify light behavior is correct.
    ⚠️If airbag warning light remains on or flashes after installation, DO NOT drive vehicle. A fault exists that must be diagnosed and repaired. Vehicle is unsafe until airbag system is verified functional.

Reassembly

1. Verify all seat functions operate correctly (recliner, slider, power/heated seat functions if equipped)
2. Test seat movement through full range to ensure no interference with trim panels or wiring
3. Confirm all seat mounting bolts are torqued to specification
4. Document the airbag replacement in vehicle service records with date and mileage

Verification

• Turn ignition to ON position and verify airbag warning light illuminates briefly then extinguishes (normal bulb check)
• Scan airbag system with professional diagnostic tool to confirm no fault codes are present
• Verify airbag warning light does not illuminate during test drive
• Confirm seat is secure with no movement at mounting points
• Test all seat electrical functions (if equipped) to ensure proper operation
• Verify trim panels are secure with no rattles or gaps

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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