BMW X3 2018–2021 — technical service bulletin
Bulletin B540320 · NHTSA communication 10186220 · issued Dec 1, 2020
Technical service bulletin
communication type
Equipment
component
2018–2021
model years
15
vehicle entries
Official summary
SUNROOF NOT INITIALIZED: The sunroof will not operate and has the following fault codes stored: 030215 - SHD: invalid characteristic curve, no standardization exists and 030220 - SHD: System not standardized and 030295 - invalid characteristic curve, no standardization exists and 0302A0 - Service history: System not standardized. During operation, the sunroof may have lost initialization due to extended activation of the switch.
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.