A turbine-like noise can be heard from the rear axle while deceleration during the first 300 miles of...
BMW technical service bulletin B340921 for 2016-2018 BMW M3, 2016, 2018-2020 BMW M5 and 2016-2020 BMW M4.
- Bulletin number
- B340921
- Component
- Service brakes
- Summary
- A turbine-like noise can be heard from the rear axle while deceleration during the first 300 miles of operation when braking from low speed.
Owners of these vehicles have filed 2 complaints in the brakes category.
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