Airbag - Side

This procedure covers the removal and replacement of the side airbag module located in the front seat backrest on 2018-2024 Honda Accord vehicles with the 1.5L turbo engine.

Warnings

Tools required

Parts

• Side airbag module × 1 — Use OEM Honda part number for specific seat position
• Side airbag connector seal (if damaged) × 1 — Use OEM specification
• Seat upholstery clips (if broken) × 4 — 91503-SZ3-003 or equivalent

Preparation

1. Park vehicle on level ground and engage parking brake
2. Turn ignition to OFF position and remove key/fob from vehicle completely
3. Disconnect negative battery terminal first, then positive terminal using battery terminal wrench
4. Wait a MINIMUM of 3 FULL MINUTES for SRS system capacitors to discharge - set a timer and do not proceed early
5. Move front seat to full rearward position for initial access
6. Take photos of seat position and connector routing for reinstallation reference
7. Verify you have the correct replacement airbag module for the specific seat (driver vs passenger side)
8. Ensure replacement airbag is new, undamaged, and has not been dropped or impacted

Procedure

1. 1

   Remove seat mounting bolts
   Move the seat fully forward. Remove the plastic covers over the rear seat rail mounting bolts. Using a socket wrench, remove the two rear seat mounting bolts. Move the seat fully rearward and remove the plastic covers over the front seat rail mounting bolts. Remove the two front seat mounting bolts. There are four bolts total securing the seat to the floor rails.
   Torque spec

   Mounting Bolts26 Nm (19 lb-ft)
2. 2

   Disconnect seat electrical connectors
   Carefully tilt the seat backward to access the underside. Locate all electrical connectors under the seat (typically 2-4 connectors for power, heating, airbag, and occupant sensor). Press the locking tabs and disconnect each connector. Note the yellow connector is the SRS airbag harness - handle with care. For models with seat belt tensioner, disconnect that yellow connector as well.
   ⚠Yellow connectors are SRS components. Ensure battery has been disconnected for at least 3 minutes before handling these connectors.
3. 3

   Remove seat from vehicle
   With all electrical connections disconnected, carefully lift the seat straight up and out of the vehicle. Use proper lifting technique - seats weigh 40-60 lbs. Place the seat on a clean, protected workbench with the backrest accessible. Position the seat so the side requiring airbag replacement is easily accessible.
   ℹ️Use proper lifting technique to avoid back injury. Consider having an assistant help lift the seat.
4. 4

   Remove seat backrest side panel
   Locate the plastic side panel on the outboard side of the seat backrest. On the affected side, carefully pry out the panel using trim removal tools starting from the bottom rear edge. The panel is held by multiple plastic clips. Work slowly around the perimeter to release all clips without breaking them. Once all clips are released, remove the side panel to expose the airbag module.
   ⚠Plastic clips can break easily. Use proper trim tools and work slowly to preserve clips for reassembly.
5. 5

   Disconnect side airbag connector
   Locate the yellow SRS connector attached to the side airbag module. This connector has a red locking tab or slider mechanism. Slide or press the locking mechanism to unlock position, then carefully disconnect the connector from the airbag module. Do not pull on wires - grasp the connector body firmly.
   ⚠️Ensure 3+ minutes have elapsed since battery disconnect. Never tug on wiring - pull only on connector bodies.
6. 6

   Remove side airbag module mounting bolts
   Using a T30 Torx bit, remove the mounting bolts securing the side airbag module to the seat frame. There are typically 2-3 bolts. Keep track of all bolts and any washers or spacers. The airbag module is mounted in a bracket within the seat backrest frame. Support the airbag module while removing the final bolt.
   ⚠️Support the airbag module to prevent it from falling. Never drop or impact an airbag module.
   Torque spec

   Side Airbag Module Bolts7 Nm (5 lb-ft)
7. 7

   Remove old airbag module
   Carefully extract the old side airbag module from the seat backrest. The module may be held by additional clips or guides in the upholstery - work it free gently without tearing the seat fabric. Once removed, place the old module on the workbench with the deployment surface (marked 'AIRBAG' or with warning label) facing UP, away from your body and any other objects.
   ⚠️Always store airbag modules with deployment side facing UP. Never place objects on top of airbag modules.
8. 8

   Inspect mounting area and bracket
   Thoroughly inspect the seat frame mounting bracket for any cracks, damage, or deformation. Check that all mounting threads are clean and undamaged. Inspect the wiring harness for any fraying, cuts, or damage. Verify the connector seal is intact and undamaged. If any damage is found to structural components, the seat frame may need replacement.
   ⚠Do not attempt to repair damaged seat frame mounting points. A compromised structure may allow improper airbag deployment.
9. 9

   Install new side airbag module
   Remove the new airbag module from its protective packaging. Verify it is the correct part number for your vehicle and seat position. Carefully position the new airbag module into the seat backrest bracket, ensuring it is oriented correctly with the deployment surface facing outboard (toward the side of the vehicle). Align all mounting holes with the bracket.
   ⚠️Verify correct airbag orientation. Deployment surface must face outboard toward vehicle door. Incorrect orientation can cause severe injury.
10. 10

    Install airbag module mounting bolts
    Insert all T30 Torx mounting bolts with any washers or spacers in their original positions. Start all bolts by hand to ensure proper thread engagement. Using a torque wrench with T30 Torx bit, torque the Side Airbag Module Bolts to exactly 7.0 Nm (5.0 lb-ft) in a cross pattern if multiple bolts are present. This torque is CRITICAL for proper airbag deployment.
    ⚠️CRITICAL TORQUE: Side airbag module bolts MUST be torqued to exactly 7.0 Nm (5.0 lb-ft). Under or over-torquing can prevent proper deployment.
    Torque spec

    Side Airbag Module Bolts7 Nm (5 lb-ft)
11. 11

    Connect side airbag electrical connector
    Carefully route the wiring harness to the new airbag module connector. Align the yellow SRS connector and press it firmly onto the airbag module connector until you hear/feel a positive click. Engage the red locking tab or slider to the locked position. Gently tug on the connector (not the wires) to verify it is fully locked.
    ⚠Ensure connector is fully seated and locked. A loose connection can prevent deployment or cause false SRS warnings.
12. 12

    Reinstall seat backrest side panel
    Position the side panel over the airbag module and seat frame. Ensure no wiring is pinched or interfering with panel fitment. Starting from one corner, press firmly to engage each plastic retaining clip. Work around the entire perimeter until all clips are fully seated and the panel is flush with the seat backrest. Verify the panel does not interfere with any moving parts.
    ⚠Ensure no wiring is pinched between panel and frame. Pinched wires can cause deployment issues or electrical faults.
13. 13

    Reinstall seat in vehicle
    Carefully lift the seat and position it over the floor rail mounting points. Lower the seat onto the rails, ensuring all four mounting holes align properly. Hand-start all four seat mounting bolts to ensure proper thread engagement before tightening any bolts. Using a torque wrench and appropriate socket, torque all four Seat Mounting Bolts to 61.0 Nm (45.0 lb-ft) in a cross pattern (front left, rear right, front right, rear left).
    ⚠️CRITICAL TORQUE: Seat mounting bolts MUST be torqued to 61.0 Nm (45 lb-ft). Improperly secured seats are a serious safety hazard in collisions.
    Torque spec

    Mounting Bolts26 Nm (19 lb-ft)
14. 14

    Reconnect seat electrical connectors
    Reconnect all electrical connectors under the seat in reverse order of removal. Match each connector to its corresponding socket - they are typically keyed to prevent incorrect installation. Ensure each yellow SRS connector locks fully with an audible click. Verify the seat belt tensioner connector (if equipped) is also reconnected and locked. Ensure no wires are pinched or stretched.
    ⚠Yellow SRS connectors must click fully into place. Incomplete connections will trigger SRS warning light.
15. 15

    Reconnect battery and clear SRS codes
    Reconnect the positive battery terminal first, then the negative terminal. Tighten battery terminals securely. Turn the ignition to ON position (do not start engine). The SRS warning light should illuminate for approximately 6 seconds then extinguish. If the light remains on or flashes, there is a fault in the system - do NOT drive the vehicle and use a Honda-compatible scan tool to read SRS codes and verify proper installation.
    ⚠️If SRS warning light remains illuminated or flashes, DO NOT DRIVE the vehicle. A fault exists that must be diagnosed and corrected immediately.

Reassembly

1. Install plastic covers over all four seat mounting bolts
2. Test all seat adjustments (fore/aft, recline, height if equipped) to ensure normal operation
3. Test seat heaters and power functions if equipped to verify electrical connections
4. Reset power windows if necessary following Honda initialization procedure
5. Reset radio clock and presets

Verification

• Verify SRS warning light illuminates for 6 seconds at ignition ON, then extinguishes completely
• Check that all seat electrical functions operate normally (power adjustment, heating, memory if equipped)
• Physically verify all four seat mounting bolts are tight and seat does not move on rails
• Verify seat backrest side panel is secure with no gaps or loose clips
• Confirm seat belt operates normally and retracts properly
• Use Honda HDS scan tool or equivalent to verify no active or pending SRS codes are present
• Perform test drive and verify no unusual noises from seat and SRS light remains off during operation
• Document airbag replacement with part number, date, and mileage for vehicle service records

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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