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 DIAGNOSISACCESSORIES & EQUIPMENTINFOTAINMENTINFORMATION & ENTERTAINMENT SYSTEM - FUNCTIONAL DESCRIPTION -- E90INFORMATION & ENTERTAINMENT SYSTEM - FUNCTIONAL DESCRIPTIONRADIOSYSTEM OVERVIEW
2011 BMW 335xi 4D Sedan, Automatic
System overview
2011 BMW 335xi 4D Sedan, AutomaticSECTION System overview
The following graphic shows the functional networking of the radio (RAD) using the example of F25.
| Item | Explanation |
|---|---|
| 1 | Central gateway module (ZGM) |
| 2 | Steering column switch cluster |
| 3 | Instrument panel (KOMBI) |
| 4 | Dynamic stability control (DSC) |
| 5 | Junction Box Electronics (JBE) |
| 6 | Mid-range speaker, front right |
| 7 | Mid-range speaker, rear right |
| 8 | Power distribution box, rear |
| 9 | Additional brake light |
| 10 | Diversity aerial |
| 11 | Interference suppression filter for the additional brake light |
| 12 | Mid-range speaker, rear left |
| 13 | Bass speakers |
| 14 | Integrated chassis management (ICM) |
| 15 | AUX-IN connection |
| 16 | Radio (RAD) |
| 17 | Footwell module (FRM) |
| 18 | Mid-range speaker, front left |
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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.