Land Rover Defender 2020 — technical service bulletin
Bulletin SSM74988 · NHTSA communication 10179500 · issued Aug 11, 2020
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2020
model years
1
vehicle entries
Official summary
DTC C055E-7A (Brake Hydraulic Circuit â Aâ Leak â Fluid Leak or Seal Failure) requires a system â Self-Checkâ to be carried out before clearing the DTC and extinguishing the warning lights.
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.