Subaru Ascent 2019–2021 — technical service bulletin
Bulletin 15-236-18R · NHTSA communication 10198774 · issued Jun 8, 2021
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
18
vehicle entries
Official summary
The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed.
Vehicles covered
- 2019 Subaru Ascent
- 2020 Subaru Ascent
- 2021 Subaru Ascent
- 2019 Subaru BRZ
- 2020 Subaru BRZ
- 2019 Subaru Crosstrek
- 2020 Subaru Crosstrek
- 2021 Subaru Crosstrek
- 2019 Subaru Forester
- 2020 Subaru Forester
- 2021 Subaru Forester
- 2019 Subaru Impreza
- 2020 Subaru Impreza
- 2021 Subaru Impreza
- 2019 Subaru Legacy
- 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.