2021 Subaru Forester electrical system problems
33 owner complaints filed with NHTSA name the electrical system on the 2021 Subaru Forester — 16% of all complaints for this model year.
What owners report
“The contact owns a 2021 Subaru Forester. The contact stated that while trying to roll up vehicle windows from driver sits and passenger sit they would roll up to 3/4th all the way up and they would roll back down after. The contact stated this was a recurring event. The dealer was aware of failure…”
filed Jul 7, 2026
“My 2021 Subaru Forester has a recurring, worsening defect in the Idle Stop/Start (ISS) system that creates a stalling hazard. When ISS shuts the engine off at a stop, the engine intermittently fails to restart when I try to move again. It cranks progressively slower, warning lights illuminate, a…”
filed Jul 2, 2026
“Persistent Battery Drain on a 2021 Subaru Forester Limited. Problems began in year 4 of ownership (~17,000 mileage), after Subaru Starlink Subscription services expired. Red (Error) Starlink SOS indicator light was evident, where a normal light would show green. Battery would fully drain after about 3-4 days of…”
filed Jun 17, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This bulletin announces the design change made to the high-pressure fuel pump developed to prevent DTC P0087 (Fuel Rail/System Pressure – Too Low Bank 1). (This is an revised version of the original bulletin.)
09-123-24R · Service Bulletin/Repair Instructions · issued Jul 28, 2026This bulletin announces design changes made to the fuel injector in response to the DTCs listed. (This is an revised version of the original bulletin.)
09-81-21R · Service Bulletin/Repair Instructions · issued Jul 27, 2026This bulletin announces a design change made to the CVT Control Valve Body which incorporates an enhanced valve sleeve to improve durability. (This is an revised version of the orignal bulletin.)
16-156-25R · Service Bulletin/Repair Instructions · issued Jun 2, 2026This bulletin announces a design change made to the CVT Control Valve Body which incorporates an enhanced valve sleeve to improve durability.
16-156-25R · Service Bulletin/Repair Instructions · issued May 13, 2026
Electrical System problems in other Forester years
| Year | Reports | Share |
|---|---|---|
| 2025 Forester | 8 | 9% |
| 2024 Forester | 1 | 4% |
| 2023 Forester | 7 | 10% |
| 2022 Forester | 10 | 11% |
| 2020 Forester | 99 | 17% |
| 2019 Forester | 134 | 16% |
| 2018 Forester | 69 | 14% |
| 2017 Forester | 105 | 18% |
| 2016 Forester | 93 | 23% |
| 2015 Forester | 82 | 13% |
| 2014 Forester | 42 | 10% |
| 2013 Forester | 3 | 4% |
Other reported problem areas on the 2021 Subaru Forester
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.