BMW 323CI 1999–2000 — technical service bulletin
Bulletin B121616 · NHTSA communication 10147534 · issued Jul 1, 2016
Technical service bulletin
communication type
Electrical System
component
1999–2000
model years
6
vehicle entries
Official summary
OXYGEN SENSORS - READINESS CODE MONITOR IS NOT SET. Vehicle may not pass the state inspection (SMOG or I/M) due to oxygen sensors readiness monitor not set/not fitted/not supported. DME software error.
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.