2021 Subaru Forester engine problems

Related recalls

No recalls on file.

What owners say

1. Filed Oct 3, 2026CAEngineFuel, Hybrid & EV Propulsion

   On two separate occasions, less than one year apart after Subaru Service replaced my battery with a “larger” battery without my knowledge my vehicle suffered sudden, catastrophic electrical failure while moving in active highway traffic, causing an immediate loss of propulsion and creating a life-threatening safety hazard. This has happened two times the second time less than a year after the “larger” battery replacement. This car has less than 50,000 miles on it and has a…

   NHTSA complaint #11768776 · source
2. Filed Jul 2, 2026WIElectrical SystemEngineTransmission & Drivetrain

   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 continuous alert sounds, and the vehicle cannot proceed until I shift to Park and restart manually. This has left me immobile in live traffic at lights, stop signs, and mid-turn. The…

   NHTSA complaint #11748058 · source
3. Filed Apr 17, 2026VAFireEngineFuel, Hybrid & EV PropulsionOther / Unknown

   While driving this car on April 4, 2026 at around 6PM, I experienced the distinct smell of gasoline. I had driven for about 5 minutes on our way to a local restaurant that is approximately an 8 minute drive from our residence. My wife said that she had just filled the gas tank that afternoon. After arriving at the restaurant, I checked the gas cap to ensure it was tightly sealed. I also checked to ensure no fuel was leaking from the car. After finishing dinner, we I drove…

   NHTSA complaint #11731868 · source
4. Filed Apr 2, 2026WAEngine

   While driving the car, the engine stops completely. After a few seconds, it can be restarted. It does this several times a week at random intervals. It's very dangerous since it usually happens when we're driving in traffic. The dealer checked it out in July but couldn't find anything wrong. Even though it's a serious safety problem, they said to keep driving it until it does it every time the car is driven or until the car won't run. When this happens, all the dashboard…

   NHTSA complaint #11728784 · source
5. Filed Apr 1, 2026TNElectrical SystemEngineOther / Unknown

   Automatic start/stop fails to turn car on - intermittent. Taken it to Subaru detailer miltiple times and paid for services to correct the issue, but the issue persists. Fist time - replaced the battery in July 2025. 2nd time, went on a ride along for 1 hour, issue did not happen, replaced spark plugs, issue persists. 3rd time, updated TCM software, issue still persists. Subaru of America is aware of the issue and have not gotten a resolution either.

   NHTSA complaint #11728464 · source
6. Filed Mar 12, 202630,000 miILCrash4 injuredTowedEngineTransmission & Drivetrain

   The contact owned a 2021 Subaru Forester. The contact stated that while driving at approximately 4 MPH and slowing to park, the vehicle accelerated on its own. The contact stated that the vehicle drove out of the parking lot and crashed into a wall. The contact stated that the air bags deployed and that the vehicle had then shifted into reverse (R) and driven out away from the wall and crashed into a parked vehicle and stopped. The contact stated she was unaware of any…

   NHTSA complaint #11723858 · source
7. Filed Feb 1, 2026TXElectrical SystemEngineSeats & Seat Belts

   Car drains battery. 45,000 miles and has had 3 batteries and have been told it needs another. Dealer says start stop switch, requires a battery of 750 CCA and not the Subaru recommend battery. Car will die in traffic and driver seat adjusts to different positions by itself. Told that these problems will never stop unless I get a higher rated battery than required.

   NHTSA complaint #11714847 · source
8. Filed Jan 26, 2026TXEngine

   On January16,2026 while driving from Houston,TX to Austin TX the vehicle experienced a complete loss of power on Highway 71 W. We were traveling at approximately 70 MPH when the engine completely failed. We were forced to immediately pull over onto a narrow shoulder Our situation at that point was dire: we could not exit the vehicle as other cars were speeding by. Fortunately an emergency vehicle from the Texas Department of Transportation pulled up behind us with his…

   NHTSA complaint #11713463 · source
9. Filed Oct 31, 2025GAElectrical SystemEngine

   The vehicle has experienced four separate engine shutdowns while stopped in traffic. Each time, the engine turned off unexpectedly, requiring a manual restart. One incident occurred near a railroad crossing with my child in the car. The vehicle also lurches forward at low speeds and hesitates when accelerating after being stopped. These issues persist despite service visits. I believe they may relate to Technical Service Bulletins regarding the Auto Start/Stop and battery…

   NHTSA complaint #11696842 · source
10. Filed Oct 24, 202532,000 miNJTowedEngine

    The contact owns a 2021 Subaru Forester. The contact stated that while stopped at a traffic signal, the vehicle stalled. No warning light was illuminated. The contact was able to restart the vehicle. The contact stated that on a separate occasion, while driving over railroad tracks, the vehicle stalled. No warning light was illuminated. The contact was able to restart the vehicle. The contact continued to drive, and two blocks later, the vehicle stalled. No warning light was…

    NHTSA complaint #11695458 · source
11. Filed Sep 4, 2025CTElectrical SystemEngineSteering

    driving on [XXX] in NJ on [XXX] at approximately [XXX] my car just stopped in traffic and steering locked up and all lights came on dashboard along with a constant beeping sound-I was in the middle of a four lane highway traveling south-I could not get out of my car and feared someone would hit me as I was a "sitting duck" while cars were swerving around me-my only saving grace was that my flashers worked after I turned them on-I called roadside assistance as I was starting…

    NHTSA complaint #11684971 · source
12. Filed Aug 12, 2025FLEngineFuel, Hybrid & EV Propulsion

    Vehicle began surging during acceleration. Dealer stated that the Engine Intake Valves had carbon deposits that were causing performance issues including poor fuel economy, increased emissions and running concerns. The valves required a cleaning to correct the issue. This is a 4 year old vehicle with only 38,000 miles, this is unacceptable for issues like this so soon. Estimated cleaning cost is $300 and is mentioned no where in the scheduled maintenance information.

    NHTSA complaint #11680140 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology