Land Rover Range Rover 2020–2021 — technical service bulletin
Bulletin SSM75186 · NHTSA communication 10202938 · issued Oct 13, 2021
Technical service bulletin
communication type
Electrical System
component
2020–2021
model years
4
vehicle entries
Official summary
High Voltage (HV) Coolant Heater Internal failure.
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.