Ford Bronco Sport 2021–2022 — technical service bulletin
Bulletin SSM 51645 · NHTSA communication 10236581 · issued May 16, 2023
Technical service bulletin
communication type
Exterior Lighting
component
2021–2022
model years
2
vehicle entries
Official summary
Some 2021-2022 Bronco Sport vehicles may exhibit a condition where the low beams turn on by themselves while the vehicle is OFF for 10 or more minutes with diagnostic trouble code (DTC) B1533 stored in the body control module (BCM). This may be due to the internal logic within the headlamp switch. To correct this condition, replace the headlamp switch (service base PN: 11654). Refer Workshop Manual, Section 417-01.
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.