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 2015-2018, 2021 BMW M3, 2015-2021 BMW M4 and 2016-2021 BMW M2.
- Bulletin number
- B340921
- Component
- Power train: axle assembly
- Summary
- A turbine-like noise can be heard from the rear axle while deceleration during the first 300 miles of operationwhen braking from low speed.
Owners of these vehicles have filed 18 complaints in the transmission category.
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