BMW X1 2016–2017 — technical service bulletin
Bulletin B120717 · NHTSA communication 10146630 · issued Apr 1, 2017
Technical service bulletin
communication type
Electrical System
component
2016–2017
model years
4
vehicle entries
Official summary
?SERVICE ACTION: PROGRAM CONTROL UNITS (DME). Due to an error in the OBD diagnostics of the DME software, a marginal catalytic convertor or post catalyst oxygen sensor may not be detected as faulty.
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.