Service Precautions

1999 BMW 328i 2D Convertible, AutomaticSECTION Service Precautions

Observe these precautions when working with air bag systems:

  • Disable air bag system before servicing any SRS or steering column component. Failure to do this could result in accidental air bag deployment and possible personal injury. See DISABLING & ACTIVATING AIR BAG SYSTEMΒ .
  • After an accident, all SRS components, including harness and brackets, must be inspected. If any components are damaged or bent, they must be replaced, even if a deployment did not occur. Check steering column, knee bolster, instrument panel steering column reinforcement plate and lower brace for damage.
  • DO NOT service any component or wiring. If components or wiring are damaged or defective, replacement is necessary. DO NOT use components from another vehicle. Only use new replacement components supplied by manufacturer.
  • Always wear safety glasses when servicing or handling an air bag.
  • Air bag module must be stored in its original special container until used for service. It must be stored in a clean, dry place, away from sources of extreme heat, sparks and high electrical energy.
  • When placing a live air bag module on a bench or other surface, always face air bag and trim cover up, away from surface. This will reduce motion of module if it is accidentally deployed.
  • After deployment, air bag surface may contain deposits of sodium hydroxide, which can irritate skin. Always wear safety glasses, rubber gloves and long-sleeved shirt during clean-up, and wash hands using mild soap and water. Follow correct disposal procedures.
  • NEVER allow any electrical source near inflator on back of air bag module.
  • When carrying a live air bag module, trim cover should be pointed away from body to minimize injury in case of deployment.
  • When installing SRS wiring harnesses, ensure they will not be pinched or interfere with other vehicle components.
  • If SRS is not fully functional for any reason, vehicle should not be driven until system is repaired. DO NOT remove any component or in any way disable system from operating normally. If SRS is not functional, park vehicle until repairs can be made.

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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.