A rattling/droning noise is heard in the vehicle interior when the air conditioning (AC) is activated
BMW technical service bulletin SIB640521 for 1999-2011, 2017-2022 BMW 330I and 2019-2023 BMW M340I.
- Bulletin number
- SIB640521
- Component
- Engine and engine cooling: cooling system
- Summary
- A rattling/droning noise is heard in the vehicle interior when the air conditioning (AC) is activated. Vibrations are felt in the driver's footwell.
Owners of these vehicles have filed 183 complaints in the engine category.
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