Land Rover Defender 2020–2023 — technical service bulletin
Bulletin Defender_N792_21MAR25 · NHTSA communication 11016661 · issued Mar 21, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2020–2023
model years
4
vehicle entries
Official summary
Vehicles are unable to complete software updates through Software Over The Air(SOTA) and require a Telematic Control Unit Module (TCU) SOTA persistency clear application to be completed.
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.