Subaru Ascent 2019–2025 — technical service bulletin
Bulletin 15-256-19R · NHTSA communication 11021257 · issued Jul 10, 2025
Technical service bulletin
communication type
Electrical System
component
2019–2025
model years
29
vehicle entries
Official summary
This bulletin provides information on a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.1 Audio and Navigation head units (H/U) utilized in the models as listed above. Firmware-over-the-air (FOTA) is a process by which remote devices can receive updates to their operating software.
Vehicles covered
- 2019 Subaru Ascent
- 2020 Subaru Ascent
- 2021 Subaru Ascent
- 2022 Subaru Ascent
- 2019 Subaru BRZ
- 2020 Subaru BRZ
- 2021 Subaru BRZ
- 2019 Subaru Crosstrek
- 2020 Subaru Crosstrek
- 2021 Subaru Crosstrek
- 2022 Subaru Crosstrek
- 2023 Subaru Crosstrek
- 2019 Subaru Forester
- 2020 Subaru Forester
- 2021 Subaru Forester
- 2022 Subaru Forester
- 2023 Subaru Forester
- 2024 Subaru Forester
- 2025 Subaru Forester
- 2019 Subaru Impreza
- 2020 Subaru Impreza
- 2021 Subaru Impreza
- 2022 Subaru Impreza
- 2023 Subaru Impreza
- 2019 Subaru Legacy
- 2019 Subaru Outback
- 2019 Subaru WRX
- 2020 Subaru WRX
- 2021 Subaru WRX
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.