BMW X3 2018–2020 — technical service bulletin
Bulletin B541119 · NHTSA communication 10176376 · issued May 1, 2020
Technical service bulletin
communication type
Equipment
component
2018–2020
model years
9
vehicle entries
Official summary
SUNROOF WATER LEAK DIAGNOSIS: This bulletin outlines multiple known areas of possible water entry for the vehicles listed above. It serves only as a diagnostic resource in troubleshooting water leak complaints from the roof area. This bulletin does not include all potential areas of water entry from the sunroof. Additional diagnosis may be required for vehicles which are not affected by the scenarios outlined below. The following situations are known to be potential causes for water entry into the vehicle from the sunroof area: Incorrect adjustment of sunroof glass panels Damage to the sunroof
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.