2021 Subaru Forester Engine Problems
- Complaints
- 34about this part
- Share
- 16%of 212 total for the year
- Median mileage
- 30,000miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 34 complaints about the engine of the 2021 Subaru Forester, 16% of the 212 complaints for this model year. Where a mileage was given, the median is 30,000 miles. 4 of these say a crash was involved and 3 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“On 04/02/2022, several minutes after having filled the gas tank, I was driving at about 35 mph on a two lane road at constant throttle, when the engine suddenly lost power for several seconds before it regained acceleration. There was a pickup truck following me very closely and it swerved around me to avoid hitting me. On 04/13/2022 , several minutes after leaving my driveway, at about 27 mph on a two lane road, the engine again lost power for several seconds before resuming power. In the first case the engine was at operating temp., in the second case it was cold. …”
NHTSA complaint #11462054, filed 2022-04, 12,500 miles“Was stopped at traffic light. Start Stop system was engaged. Engine turned off as normal. When I took my foot off the brake the engine did not engage and the Eyesight warning light came on that the Eyesight system was not functioning. Put the car in park and engaged the ignition button and the engine started. Turned off the Start Stop system and the car functioned normally after that. Have read postings on Subaru forum that this has happened to others.”
NHTSA complaint #11654189, filed 2025-04“My vehicle stalls at stop signs and red lights at Least once or twice a day regularly I’ve taken to the dealer and they said I was the reason it does that but the car is barely 2 years old bought new it has been doing that since last year it needs to be fixed”
NHTSA complaint #11504591, filed 2023-01“Once or twice a day my vehicle hesitates from a light and I have to almost floor it to get it going again.I have brought it to 2 different Subaru dealers 3 times and they say they can't fix the problem.”
NHTSA complaint #11569468, filed 2024-02“The 2021 Subaru Forester had been functioning normally with no warning lights. About 25 minutes into the drive I had come to a stop light on an upward incline. When the light turned green I moved from the brake to the gas as usual. However the auto-start function on the car failed, causing the engine to stall. A loud clunking sound was heard and the dashboard lit up with multiple lights, although I do no recall which ones were illumined. I attempted to press the gas again and the car did not respond. …”
NHTSA complaint #11571429, filed 2024-02Related service bulletins
- 11034269Jun 30, 2026This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components…
- 11034264Jun 26, 2026This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components…
- 11033065May 13, 2026This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components…
- 11033051May 1, 2026This bulletin announces the diagnostic procedures to be used when DTCs B1571(REFERENCE CODE INCOMPATIBILITY IMMOBILIZER CM TO ECM) and B1572(IMM CIRCUIT EXCEPT ANTENNA CIRCUIT)…
- 11027982Jan 12, 2026This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES).
- 11027978Jan 8, 2026This 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).
- 11027090Dec 12, 2025This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components…
- 11027083Dec 8, 2025This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 (Immobilizer Key Collation Diagnosis).
- 11027081Dec 8, 2025This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1) and P2097 (POST CATALYST FUEL TRIM SYSTEM TOO RICH…
- 11025790Nov 20, 2025This bulletin announces the diagnostic procedures to be used when DTCs P2096 (POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1) and P2097 (POST CATALYST FUEL TRIM SYSTEM TOO RICH…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 3% |
| 2025 | 4 | 4% |
| 2024 | 1 | 3% |
| 2023 | 5 | 7% |
| 2022 | 11 | 11% |
| 2021 | 34 | 16% |
| 2020 | 81 | 13% |
| 2019 | 106 | 13% |
| 2018 | 32 | 6% |
| 2017 | 47 | 8% |
| 2016 | 60 | 14% |
| 2015 | 131 | 21% |
| 2014 | 69 | 17% |
| 2013 | 27 | 35% |
| 2012 | 27 | 25% |
| 2011 | 60 | 41% |
| 2010 | 34 | 13% |
| 2009 | 27 | 15% |
| 2008 | 7 | 14% |
| 2007 | 9 | 12% |
| 2006 | 11 | 13% |
| 2005 | 3 | 3% |
| 2004 | 23 | 11% |
| 2003 | 12 | 6% |
| 2002 | 1 | 1% |
| 2001 | 2 | 1% |
| 1999 | 3 | 2% |
| 1998 | 1 | 1% |
Other parts of the 2021 Subaru Forester
90 complaintsOther or unknown
43 complaintsElectrical system
34 complaintsForward collision avoidance
17 complaintsTransmission and drivetrain
15 complaintsVehicle speed control
12 complaintsLane departure
8 complaintsBrakes
7 complaintsFuel system
7 complaintsBody and structure
4 complaintsSuspension
4 complaintsSteering
3 complaints
← All problems reported for the 2021 Subaru Forester
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology