BMW HP4 Race 2008–2018 — technical service bulletin
Bulletin MC63473054 · NHTSA communication 10136316 · issued Feb 16, 2018
Technical service bulletin
communication type
Electrical System
component
2008–2018
model years
9
vehicle entries
Official summary
Engine is placed into emergency operation mode and max rpm is reduced due to a deviation in throttle signals. Signal evaluation software has been reworked and should be installed.
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.