Land Rover Defender 2020–2022 — technical service bulletin
Bulletin NAS21.06.012 · NHTSA communication 10199019 · issued Jun 14, 2021
Technical service bulletin
communication type
Power Train
component
2020–2022
model years
10
vehicle entries
Official summary
The Malfunction Indicator Lamp (MIL) may be illuminated on the Instrument Panel Cluster (IPC) and reduced performance may be experienced, due to an intermittent internal short circuit within the electric supercharger circuit board.
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.