Subaru Ascent 2020–2026 — technical service bulletin
Bulletin 18-240-26 · NHTSA communication 11034237 · issued Jun 1, 2026
Technical service bulletin
communication type
Engine
component
2020–2026
model years
33
vehicle entries
Official summary
"This bulletin provides a new diagnostic procedure for vehicles equipped with a Denso CP 1, 1.5 and 2.5 head units to provide an enhanced version of the troubleshooting steps for Sound does not come out from the speaker."
Vehicles covered
- 2023 Subaru Ascent
- 2024 Subaru Ascent
- 2025 Subaru Ascent
- 2026 Subaru Ascent
- 2022 Subaru BRZ
- 2023 Subaru BRZ
- 2024 Subaru BRZ
- 2025 Subaru BRZ
- 2026 Subaru BRZ
- 2024 Subaru Crosstrek
- 2025 Subaru Crosstrek
- 2026 Subaru Crosstrek
- 2025 Subaru Forester
- 2024 Subaru Impreza
- 2025 Subaru Impreza
- 2026 Subaru Impreza
- 2020 Subaru Legacy
- 2021 Subaru Legacy
- 2022 Subaru Legacy
- 2023 Subaru Legacy
- 2024 Subaru Legacy
- 2025 Subaru Legacy
- 2020 Subaru Outback
- 2021 Subaru Outback
- 2022 Subaru Outback
- 2023 Subaru Outback
- 2024 Subaru Outback
- 2025 Subaru Outback
- 2022 Subaru WRX
- 2023 Subaru WRX
- 2024 Subaru WRX
- 2025 Subaru WRX
- 2026 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.