Land Rover Defender 2020–2022 — technical service bulletin
Bulletin N811 Defender 15MAY26 · NHTSA communication 11033398 · issued May 16, 2026
Technical service bulletin
communication type
Electrical System
component
2020–2022
model years
3
vehicle entries
Official summary
Door Zone Module - Quiescent Drain
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.