1990 BMW M3FACTORY OEM SERVICE PROCEDURE

System Operation Check

Turn ignition switch to ON position No. 1. SRS warning light should illuminate and then go out after 6-10 seconds if no fault codes are present. The following conditions indicate SRS is malfunctioning, and an SRS fault code will be stored in control unit memory:

  • SRS light does not illuminate when ignition is turned on.
  • SRS light does not go out after 6-10 seconds.
  • SRS light remains on after engine is started.
  • SRS light comes on or flickers while driving.

To read SRS fault code(s), see DIAGNOSIS & TESTING in AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIP section.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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