The front sunroof glass seal has shrunk, creating a gap which can cause wind noise or excess water entry.
BMW technical service bulletin B540421 for 2005-2023 BMW X5, 2004-2022 BMW X3 and 2019-2023 BMW X7 and others.
- Bulletin number
- B540421
- Component
- Visibility: sun/moon roof assembly
- Summary
- The front sunroof glass seal has shrunk, creating a gap which can cause wind noise or excess water entry.
Owners of these vehicles have filed 94 complaints in the visibility category.
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