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 DESCRIPTIONRAD2 FAULT PATTERNSAUDIO
2011 BMW 335xi 4D Sedan, Automatic
Rad2 Fault Patterns: Audio
2011 BMW 335xi 4D Sedan, AutomaticSECTION Audio
| No. | Perceived symptom |
|---|---|
| 301 | All audio sources without function, except for warning signals |
| 302 | An audio channel is missing (right/left - front/rear) |
| 303 | Speed-dependent volume control does not work or is too quiet |
| 304 | Interference noise in all audio sources |
| 305 | No volume control |
| 306 | No bass |
| 307 | No heights |
| 308 | No balance settings |
| 309 | No fader settings |
| 310 | No mute function |
| 311 | Sporadic muting of audio playback on starting a trip |
| 312 | Sporadic failure of audio playback and display (only E89x USA/Canada) |
| 313 | Fluctuations in volume |
| 314 | No audio playback after vehicle start (only E8x, E9x) |
RENDER: 1.0x
NO RELATED
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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.