Service Precautions

1992 BMW 850i AutomaticSECTION Service Precautions

Observe these precautions when working with air bag systems:

  • Disable air bag system before servicing any air bag system or steering column component. See DISABLING & ACTIVATING AIR BAG SYSTEMΒ .
  • Wait about 10 minutes after disabling air bag system before servicing. Air bag system voltage is maintained for about 10 minutes after system is disabled. Servicing system before 10-minute period may cause accidental air bag deployment and possible personal injury.
  • Air bag will operate only when ignition switch is in ON or START position. Ignition switch should ALWAYS be in LOCK position when working under hood or inside vehicle.
  • When servicing vehicle, air bag system and related parts should be pointed away from technician.
  • DO NOT use a circuit tester to check air bag harness connectors. The air bag system wiring harness and connectors have Yellow insulation for easy identification.
  • DO NOT repair, splice or modify the air bag system wiring harness. If harness is damaged, it MUST be replaced.
  • Impact sensors must ALWAYS be installed with arrow marks facing front of vehicle. Also, check sensors for cracks, defects or rust before installation. Replace impact sensor(s) if required.
  • Air bag system spiral cable MUST be aligned in the neutral position, since its rotation ability is limited. DO NOT turn steering wheel or column after removal of steering gear.
  • Handle air bag module carefully. ALWAYS place air bag module with steering wheel pad facing upward. DO NOT disassemble air bag module.
  • After removing air bag components, replace old bolts with new ones. Perform SYSTEM OPERATION CHECKΒ  to check air bag system for proper operation.
  • DO NOT expose air bag module to temperatures exceeding 212Β°F (100Β°C). DO NOT allow oil, grease or water to contact module.

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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.