No audible difference in exhaust with m performance power and sound kit.
BMW technical service bulletin B120318 for 2017 BMW 430I, 2016-2017 BMW 340I and 2017-2018 BMW 440I.
- Bulletin number
- B120318
- Component
- Engine and engine cooling: exhaust system
- Summary
- No audible difference in exhaust with m performance power and sound kit.
Owners of these vehicles have filed 17 complaints in the engine category.
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