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 735iFACTORY OEM SERVICE PROCEDURE
Circuit Protection Devices
CIRCUIT PROTECTION DEVICES LOCATION
| Component | Location |
|---|---|
| Auxiliary Relay Box | On left side of engine compartment, ahead of shock tower. |
| Electrical "E" Box | On right side of engine compartment, behind shock tower. |
| Front Fuse/Relay Box | On left side of rear engine compartment. |
| Fusible Link "A" | Below right side rear seat, next to battery. |
| Fusible Link "B" | Below rear seat. |
| Park Heating Relay Box | Behind right side of dash, above glove box. |
| Rear Fuse/Relay Box | Under left side of rear seat. |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.