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.
1990 BMW 325is AutomaticFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| ABS Control Unit | Under left side of dash, above hood release handle. |
| Active Check Control Unit | Above rear view mirror. |
| Central Locking Control Unit | Inside left kick panel below speaker. |
| Cruise Control Unit | Mounted under right side of dash. |
| Interior Light Timer Control Unit | Inside left kick panel below speaker. |
| On-Board Computer Module | In center console, to right of radio. |
| Motronic Control Unit | Under right side of dash above glove box. |
| Seat Belt Warning Timer | Under left side of dash, on electrical bracket. |
| Windshield Wiper Control Unit | In fuse/relay block. 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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