Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1992 BMW M5FACTORY OEM SERVICE PROCEDURE
Buzzers, Relays & Timers
BUZZERS, RELAYS & TIMERS LOCATION
| Component | Location |
|---|---|
| ABS Relay | In front power distribution box. See Figure . |
| Air Pump Relay | In E-Box. |
| Anti-Theft Horn (Alpine) | At right rear of engine compartment. |
| Auxiliary Water Pump Relay | In front power distribution box. See Figure . |
| Blower Relay | In front power distribution box. See Figure . |
| Compressor Control Relay | In front power distribution box. See Figure . |
| Electric Power Protection Relay | In rear power distribution box. See Figure . |
| Electric Steering Column Adjustment Relay | Below left side of dash. |
| Engine Control Module Relay | In E-Box. |
| Fuel Pump Relay | In E-Box. |
| Hazard Flasher Relay | In front power distribution box. See Figure . |
| High Speed Relay | In auxiliary relay box. See Figure . |
| Horn Relay | In front power distribution box. See Figure . |
| Left Park Lights Relay | Below left side of dash. |
| Normal Speed Relay | In auxiliary relay box. See Figure . |
| On-Board Computer Horn Relay | Below left side of rear seat. |
| Oxygen Sensor Relay | In E-Box. |
| Rear Defogger Relay | In rear power distribution box. See Figure . |
| Right Park Light/License Plate Light Relay | Below left side of dash. |
| Starter Relay | In front power distribution box. See Figure . |
| Unloader Relay, Terminal 15 | In front power distribution box. See Figure . |
| Unloader Relay, Terminal 61 | In front power distribution box. See Figure . |
| Unloader Relay, Terminal R | In front power distribution box. See Figure . |
| Washer Pump Relay | In front power distribution box. See Figure . |
| Wide Open Throttle Cut-Off Relay | Behind left kick panel. |
| Window Motor Relay | At right side of luggage compartment. |
| Wiper Relay | In rear power distribution box. See Figure . |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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