BMW i3 2014–2021 — technical service bulletin
Bulletin B010321 · NHTSA communication 10187463 · issued Jan 1, 2021
Technical service bulletin
communication type
Equipment Adaptive/mobility
component
2014–2021
model years
8
vehicle entries
Official summary
I3 REX FRONT (UPSTREAM) OXYGEN SENSOR: If a vehicle listed above arrives with engine malfunction indicator (Check Engine) warning light on, performing a Vehicle Test.
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.