Land Rover Defender 2020–2023 — technical service bulletin
Bulletin N869 Defender 15MAY26 · NHTSA communication 11033424 · issued May 16, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2020–2023
model years
4
vehicle entries
Official summary
Software Over The Air (SOTA) updates are failing to complete. Specifically Vehicle Domain Controller (VDC) PIVI and Gateway Module A (GWM). These vehicles have now been stopped from further SOTA attempts and require a wired intervention.
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.