Land Rover LR4 2010–2012 — technical service bulletin
Bulletin LTB00750NAS1 · NHTSA communication 10105439 · issued Apr 8, 2015
Technical service bulletin
communication type
Electrical System
component
2010–2012
model years
7
vehicle entries
Official summary
"situation: a loud 'buzz' noise coming from the hd radio® shortly after being switched 'on'. Cause: this may be caused by a hd radio® tuner module software issue."
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.