Land Rover Defender 2021–2022 — technical service bulletin
Bulletin Mailing N811 30APR25 · NHTSA communication 11017777 · issued Apr 30, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2021–2022
model years
5
vehicle entries
Official summary
Door zone module - quiescent drain
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.