BMW 428I 2014–2020 — warranty extension
Bulletin B010826 · NHTSA communication 11037501 · issued Sep 3, 2026
Warranty extension
communication type
Structure
component
2014–2020
model years
20
vehicle entries
Official summary
The coverage period for qualifying lower rear side panel water drain repair that addresses the issues described in the Service Information Bulletin has been extended to 15 years / 150,000 miles, as determined from the original first in-service / delivery date.
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.