Subaru Ascent 2023–2026 — technical service bulletin
Bulletin 15-305-22R · NHTSA communication 11027996 · issued Jan 20, 2026
Technical service bulletin
communication type
Electrical System
component
2023–2026
model years
19
vehicle entries
Official summary
The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
Vehicles covered
- 2023 Subaru Ascent
- 2024 Subaru Ascent
- 2025 Subaru Ascent
- 2024 Subaru Crosstrek
- 2025 Subaru Crosstrek
- 2026 Subaru Crosstrek
- 2025 Subaru Forester
- 2026 Subaru Forester
- 2024 Subaru Impreza
- 2025 Subaru Impreza
- 2026 Subaru Impreza
- 2023 Subaru Legacy
- 2024 Subaru Legacy
- 2025 Subaru Legacy
- 2023 Subaru Outback
- 2024 Subaru Outback
- 2025 Subaru Outback
- 2024 Subaru WRX
- 2025 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.