Land Rover Defender 2021–2025 — technical service bulletin
Bulletin Defender_D006 02-20-2026 · NHTSA communication 11029843 · issued Feb 20, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2021–2025
model years
5
vehicle entries
Official summary
The transfer case clutch and / or All Wheel Drive (AWD) lock cannot perform as designed. This may show as a reduction in torque to the front axle during driving or as an inability to apply the AWD lock.
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.