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 MANUALSBMW2011335XI 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEMENGINE PERFORMANCE - FUNCTIONAL DESCRIPTION -- E90ENGINE PERFORMANCE - FUNCTIONAL DESCRIPTIONENGINE CONTROL SYSTEM INTERFACESSYSTEM OVERVIEW
2011 BMW 335xi 4D Sedan, Automatic
System overview
2011 BMW 335xi 4D Sedan, AutomaticSECTION System overview
The following illustration shows the system overview of the engine control system interfaces on the F10:
| Item | Explanation |
|---|---|
| 1 | Dynamic stability control (DSC) |
| 2 | Digital engine electronics |
| 3 | Starter motor |
| 4 | Air conditioning compressor |
| 5 | Power distribution box, engine compartment |
| 6 | Junction Box Electronics (JBE) |
| 7 | Front fuse and relay module |
| 8 | fuel pump control module (EKPS) |
| 9 | Power distribution box, battery |
| 10 | Intelligent battery sensor (IBS) |
| 11 | Integrated chassis management (ICM) |
| 12 | Instrument panel (KOMBI) |
| 13 | Diagnostic socket |
| 14 | Car access system (CAS) |
| 15 | Central gateway module (ZGM) |
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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.