Land Rover Defender 2020–2026 — technical service bulletin
Bulletin SSM76492 - 20AUG26 · NHTSA communication 11037119 · issued Aug 21, 2026
Technical service bulletin
communication type
Unknown / Other
component
2020–2026
model years
36
vehicle entries
Official summary
TCU Activation Failure And InControl App Inoperative After Software Update
Vehicles covered
- 2020 Land Rover Defender
- 2021 Land Rover Defender
- 2022 Land Rover Defender
- 2023 Land Rover Defender
- 2024 Land Rover Defender
- 2025 Land Rover Defender
- 2026 Land Rover Defender
- 2021 Land Rover Discovery
- 2022 Land Rover Discovery
- 2023 Land Rover Discovery
- 2024 Land Rover Discovery
- 2025 Land Rover Discovery
- 2026 Land Rover Discovery
- 2021 Land Rover Range Rover
- 2022 Land Rover Range Rover
- 2023 Land Rover Range Rover
- 2024 Land Rover Range Rover
- 2025 Land Rover Range Rover
- 2026 Land Rover Range Rover
- 2021 Land Rover Range Rover Evoque
- 2022 Land Rover Range Rover Evoque
- 2023 Land Rover Range Rover Evoque
- 2024 Land Rover Range Rover Evoque
- 2025 Land Rover Range Rover Evoque
- 2026 Land Rover Range Rover Evoque
- 2021 Land Rover Range Rover Sport
- 2022 Land Rover Range Rover Sport
- 2023 Land Rover Range Rover Sport
- 2024 Land Rover Range Rover Sport
- 2025 Land Rover Range Rover Sport
- 2026 Land Rover Range Rover Sport
- 2021 Land Rover Range Rover Velar
- 2022 Land Rover Range Rover Velar
- 2023 Land Rover Range Rover Velar
- 2024 Land Rover Range Rover Velar
- 2025 Land Rover Range Rover Velar
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.