Land Rover Discovery 2020 — technical service bulletin
Bulletin SFCC_APR20_PG9 · NHTSA communication 10174461 · issued Apr 9, 2020
Technical service bulletin
communication type
Electrical System
component
2020
model years
2
vehicle entries
Official summary
N422 - Affected vehicles require an update to the Car Config File. Non-Nav vehicles incorrectly built with TSR and Adaptive Speed Limiter. N439 - Affected vehicles require a software update Chassis Control module (CHCM) and DTC read and clear.
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.