Subaru Ascent 2023–2025 — technical service bulletin
Bulletin 15-311-23R · NHTSA communication 11010908 · issued Nov 7, 2024
Technical service bulletin
communication type
Electrical System
component
2023–2025
model years
11
vehicle entries
Official summary
This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio and Navigation system utilized in the models listed.
Vehicles covered
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.