Land Rover Defender 2020–2021 — technical service bulletin
Bulletin SFCC_FEB2021_37 · NHTSA communication 10190039 · issued Mar 11, 2021
Technical service bulletin
communication type
Equipment
component
2020–2021
model years
2
vehicle entries
Official summary
Sunroof Only Opens Partially After Expedition Roof Rack Installation
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.