2015 Subaru Forester: sudden loss of power

Filed Apr 1, 2026 · Transmission · WA

Vehicle: 2015 Subaru Forester Mileage at Failure: 85,000 miles Component: Powertrain – CVT Transmission My 2015 Subaru Forester is experiencing a premature safety‑related CVT transmission failure at approximately 85,000 miles. The vehicle developed a pronounced whining noise that increases with vehicle speed, consistent with internal CVT bearing or pulley failure. This is a known defect pattern in Subaru Forester CVTs and is not related to maintenance or wear. The noise is continually progressing and the risk of sudden catastrophic failure makes the vehicle unsafe to operate. An authorized Subaru dealer and the District Parts & Service Manager (DPSM) both confirmed that the CVT has failed and requires full replacement. This failure occurred well within Subaru’s extended CVT warranty mileage limit of 100,000 miles, and matches the defect pattern Subaru acknowledged when it extended CVT coverage nationwide for this model. However, Subaru is refusing to replace the CVT due to the 10 calendar year extension expiration. Subaru’s maintenance schedule for this vehicle does not require any CVT fluid replacement interval, so there is no missed maintenance that contributed to the failure. A failing CVT creates a safety hazard due to to the risk of sudden loss of power, hesitation, or inability to accelerate. I am filing this complaint so the federal safety agency is aware of this premature CVT failure and the associated safety concerns of SOA's refusal to replace the CVT under their extended warranty.

Filed Nov 29, 2024 · Fuel system · CA

This is the fourth time we have had the same problem. We were on a long drive (more than 1 hour on the road) on the freeway going 65-70mph. The fuel gauge showed 2 or 3 bars left and the estimated mileage left was 40-70 miles left when the car lost forward power, the lights still worked and electrical systems were functional but it was as though there was not gas left. We had to call a tow truck to bring us gas. As soon as they put a couple gallons in the tank the car started and continued without issue to the nearest gas station. This was extremely dangerous as we had our children in the car and had a loss of power on the freeway and had to sit on the side of the freeway in a dangerous area waiting for gas to be delivered. We took it to our mechanic who could not detect any problems with the sensors, or other systems, there were no codes generated and no warning before it lost power, the low fuel light hadn't even gone on.

Filed Aug 2, 2024 · Engine · DE

Oil consumption issue starting within the first 3 years of owning the vehicle. Oil light comes on generally after driving 2,000 miles or less from the last oil change or oil fill up, but prior to the light turning on there are acceleration issues. Vehicle bucks and lunges when accelerating. Lunging seems to occur after vehicle seems to loose power to accelerate and then lunges forward shuddering as power returns. These issue worsen after oil light has come on. Vehicle feels very unsafe when trying to merge if acceleration is needed. Also almost hit from behind when car seems to lose power when trying to accelerate after stopping for a red light. Vehicle has been serviced repeatedly at dealership and oil consumption issues documented. Vehicle’s make/model with known oil consumption issues, but this vehicles VIN has not been included in recalls.

Filed Oct 5, 2023 · Fuel system · MD

On six occasions since 2020, our Subaru Forester has lost engine power at highway speeds after being driven for 2 hours on an interstate. On each occasion, we had to pull to the shoulder of the road with no engine power and restart the car. On the last three occasions it has taken 15 minutes to restart. Losing engine power at highway speed could have endangered our family or nearby drivers. We have taken the car to multiple dealers who have not been able to reproduce the failure, but after the latest incident in August 2023 our local dealers now recommends replacement of the fuel pump.

Filed Dec 7, 2022 · Electrical, Engine · OR

While driving 45mph on an icy road (approximately 25 degree(F) outside temp) the car suddenly lost power as if the CVT transmission was in neutral. However, it was still in drive. Pressing the accelerator only raised the RPMs but no power was sent to the wheels. There were cars behind me and my car was slowing down due to no power. I was fortunately able to pull off to the side of the road, stop, put in park. I put back into drive, power returned, and car drove normally for the remaining ~10miles of my trip. No warning lights from vehicle occurred during this event. This sudden loss of power could have been very dangerous especially given the road conditions. If drivers behind me were not following at a safe distance the sudden reduction in speed could have caused an accident due to the icy roads. I have not yet taken the car to be inspected, but will do so as soon as possible.

Filed Dec 4, 2022 · Steering · VT

Started the car and began to back out of driveway when power steering warning light came on and power steering was loss as soon as I began turning the wheel. Total loss of power steering. If this were to happen at highway speeds, unexpectedly, a major life threatening collision could occur. The odds of a probable coolision would be pretty high for even an experienced driver.

Filed Sep 30, 2022 · Engine, Steering · NC

Driving in merging four lane traffic 70mph when forward motion stopped due to power loss. Almost wrecked getting to shoulder of road. Stranded in 90+ heat. Vehicle would not crank.

Filed Sep 25, 2022 · Electrical, Engine · MA

We had driven up Mt Washington in NH (about 6000ft high) and were returning back. We had used the X mode (hill assist) intermittently on the way down. Had driven almost 150 miles back to home, when the car suddenly lost power and started to shudder. We were able to coast to the side. We tried to start again and again the same problem. We noticed that the brakes seemed quite warm. After about 5 minutes we tried again and were able to drive slowly to a gas station, but no one to help since it was late. Since fuel was low at 1 bar (60 miles distance to empty). We filled up the tank and made our way home driving slowly on the back roads. We are not sure if it could be a problem with the fuel, electrical system, brakes or the hill assist. While the car seems to run fine on short trips of a few miles, have not taken it out on any longer drives.

Filed May 13, 2022 · Transmission · CA

While attempting to make a left turn the car stalled and lost all power. The car had to be restarted and was able to drive back home. Took the car to dealership who stated it was a battery issue and a plugged air filter. NO check of the transmission was completed. This is the CVT transmission. The battery is 6 months old and the battery was tested multiple times by other locations and tested good. This stalling making a turn seems to be an ongoing issue with Subaru and the CVT transmission.

Filed Sep 9, 2021 · Transmission · CT

We were driving on the highway going 65 and then there were two quick shudders and jerks of the car. Seemed to lose power in those moments. Immediately after that, we could hear a faint whoosh sound when on the accelerator but the car did accelerate. That sound was not there before the shudders. Then about 30 seconds later the power gave out and the car started slowing down very quickly. Luckily we were in the right lane and could pull off to the shoulder quickly, though the shoulder was very narrow and dangerous. The car slowed down very quickly without applying that much brake. When we were stopped on the shoulder, I applied the accelerator, and the car was in Drive, and it didn’t go anywhere. Then we put it in park and the car rolled forward. So both the drive and park gears were not working. We turned the car off and then back on to try the gears again. Same issues happened again with drive and park. This was a very dangerous situation that occurred quickly on a highway. The issue described and what we experienced seems to be consistent with similar issues with other CVT transmissions. We hope the federal safety agency follows up with Subaru as we will be as well.

Filed Mar 14, 2021 · 135,000 miles · OR

After 4hrs of driving with 2 pit stops in between, I was in 3 lane traffic and down to 1 bar on fuel gauge stating I had 50mi left of driving remaining in tank.. Low fuel light hadn't even turned on yet, only to find that the car had lost power and reduced speed and wouldn't accelerate when I used has pedal. However the interior lights and power windows still worked. I was able to pull off to the side of road and shut the car off. I looked under the hood and found nothing to be out of sorts. No dash lights went off either such as battery or check engine. I started the car back up in 5mins and fueled my car up. Also, during the trip my fuel mileage was consistently going down which the lowest reading days 17mpg when normally 30mpg. This happened the day after taking my vehicle in for new tires at a corporate tire company. 2 weeks later car having troubles starting. Battery and alternator checked out good, so suspected fuel pump. Car dealership states fuel filter inside the pump and even if there was a way to test the pressure it may not be accurate because it could be intermittent failure and doesn't recommend me replacing it. They wanted me to wait until it happens again before looking into it any further. They checked for dtc codes and found none. Also suggested I just upgrade to a newer vehicle and I stated that at 138,000 the car should still be repairable and driveability otherwise what's the point of purchasing to own the vehicle. Obviously the situation was dangerous and could lead to a slew of problems such as standing, accident or even death.

Filed Dec 11, 2020 · Engine, Transmission · 70,000 miles · CO

Tl* the contact owns a 2015 subaru forester. The contact stated that while driving approximately 70 MPH, the speed suddenly decreased independently to approximately 20 MPH. During the sudden lose of power, no warning messages were displayed. The vehicle was towed the local dealer schomp subaru located at 580 s havana st, aurora, co 80012 who was unable to duplicate the failure. There was no repair performed on the vehicle. The manufacturer was notified of the failure. The failure mileage was 70,000.