Land Rover Discovery 2019–2020 — technical service bulletin
Bulletin SSM74732Att1 · NHTSA communication 10172201 · issued Feb 20, 2020
Technical service bulletin
communication type
Electrical System
component
2019–2020
model years
2
vehicle entries
Official summary
Due to insufficient ground contact at G4D178 Battery earth stud, various fault codes may appear and symptoms related to voltage drop ground, high ground point resistance and power supply. An intermittent start may be reported.
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.