Land Rover Defender 2020–2021 — technical service bulletin
Bulletin SSM75479ATT2 · NHTSA communication 10199804 · issued Jul 19, 2021
Technical service bulletin
communication type
Exterior Lighting
component
2020–2021
model years
2
vehicle entries
Official summary
Front Daytime Running Light(s) Are Not Working / Intermittent Operation
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.