Land Rover LR4 2016 — technical service bulletin
Bulletin SSM72545 · NHTSA communication 10105989 · issued Nov 30, 2015
Technical service bulletin
communication type
Electrical System
component
2016
model years
3
vehicle entries
Official summary
"issue: early life oxygen sensor concerns on 2016 model year vehicles, affecting range rover (lg), range rover sport (lw) and discovery 4/lr4 (la) fitted with either the 3.0sc aj126 or 5.0na/sc aj133 engines. Cause: parts quality issue (operational failure at supplier during manufacture of the sensor)."
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.