Auto engine start/stop — occasionalminor
The auto start/stop stalling thread that was loud on 2019–2020 is minimal on the 2023, but a few owners still report the engine not restarting cleanly at stops. It's a driveability nuisance rather than a covered defect. On the drive, run several stop/start cycles in traffic and confirm the engine restarts every time; the feature can be disabled each trip.
Sources: NHTSA complaint database, 2023 Subaru Forester (true count 69)