Land Rover Defender 2020–2022 — technical service bulletin
Bulletin N641NAS3 · NHTSA communication 10228929 · issued Dec 9, 2022
Technical service bulletin
communication type
Electrical System
component
2020–2022
model years
10
vehicle entries
Official summary
Certain 2020 to 2022 model year vehicles are unable to complete software updates through Software Over The Air (SOTA) due to incorrect Telematic Control Unit Module (TCU) or PIVI software.
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.