BMW 328D 2014–2018 — warranty extension
Bulletin B010520 · NHTSA communication 11022852 · issued Aug 15, 2025
Warranty extension
communication type
Engine
component
2014–2018
model years
9
vehicle entries
Official summary
N47/n57 diesel engine egr cooler revised ext ltd wty(elw) coverage/procedure
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.