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.
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HOMESERVICE MANUALSBMW2011335I 4D SEDAN, STANDARDREPAIR AND DIAGNOSISRESTRAINTSRESTRAINTS CONTROL SYSTEMSRESTRAINT SYSTEM - FUNCTIONAL DESCRIPTION -- E90RESTRAINTS SYSTEM - FUNCTIONAL DESCRIPTIONROLL-OVER PROTECTION SYSTEMROLLOVER PROTECTION CONTROLLER
2011 BMW 335i 4D Sedan, Standard
Rollover protection controller
2011 BMW 335i 4D Sedan, StandardSECTION Rollover protection controller
The rollover protection controller
- monitors itself internally.
- is not directly diagnosis-capable.
- is connected across a serial cable with the airbag control unit.
- in the event of a fault it sends a message to the airbag control unit, at the same time creating a fault entry.
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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.