Land Rover Defender 2023–2025 — technical service bulletin
Bulletin SSM76255 · NHTSA communication 11015337 · issued Feb 4, 2025
Technical service bulletin
communication type
Engine
component
2023–2025
model years
9
vehicle entries
Official summary
Coolant Loss Through Engine Coolant Expansion Tank Cap
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.