2020 Subaru Forester other reported problems

UNKNOWN OR OTHER

My 2020 Subaru Forester Sport suffered catastrophic engine failure on 6/19/2026 at 156,322 miles, 15 days and 1,031 miles after a thermo control valve (TCV) repair performed at an authorized Subaru dealer on 6/4/2026. The TCV is a known defect covered under Subaru TSB 09-119-24 (extended coverage to 150,000 miles/15 years). I never received mailed notification of this TSB and therefore did not seek repair within the covered window; Subaru approved the repair as a goodwill exception. While driving on I-70 westbound near Genesee, CO, on a sustained mountain grade with my family in the vehicle, I heard a loud noise. The oil temperature spiked to approximately 280°F, warning lights illuminated, and the vehicle lost all power in highway traffic. Losing propulsion on a steep grade in mountain traffic created a serious risk to my family and surrounding vehicles. Post-failure condition: empty coolant reservoir, coolant-contaminated (milky, green-tinted) oil, and metal debris on the dipstick, consistent with cooling-system failure causing engine seizure. I have timestamped photos. The engine is locked and the vehicle inoperable. The vehicle was towed to the same authorized dealer on 7/9/2026. The dealer's technician confirmed the engine is seized and requires teardown ($3,302.95) for full diagnosis; the dealer states teardown proceeds only on authorization from me or Subaru of America. I opened a case with Subaru of America on 5/26/2026 and formally requested in writing that Subaru authorize the teardown, with a stated deadline. As of 7/17/2026, the dealer confirms Subaru has sent no authorization or any communication during the week the vehicle has been on their lot. My written deadline, follow-up call, and final written notice went unanswered. The vehicle and all components are preserved at the dealer and available for inspection upon request.

NHTSA complaint #11751083 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

The thermo control valve (TCV) failed on my Forester (2020 model year). The failure first manifested on 16 June, 2026, with two warning lights: Eyesight Off, and Check Engine. Next day a related failure occurred, described below. Based on my call to dealer, the service department told me the car could be driven if the check engine light was steady, not blinking. It was steady. I then attempted to drive 3 miles to a dental appointment, intending to take the Forester to the dealer next. During this trip, automatic front braking spontaneously began. I was able to cross one lane of city traffic and lurch into a parking lot. Tested around the parking lot the next day, the same automatic braking sequence spontaneously engaged. The word “brake” was constantly illuminated on the dashboard. The vehicle could not be driven and was towed to the dealer. Replacement of the TCV led to the disappearance of the warning lights and ended the continuous automatic braking. The critical point is that, had I not had a dental appointment, I would have tried to drive the vehicle to the dealer in heavy freeway traffic when the automatic braking engaged. This would have put me at great risk of being rear-ended, or, if a vehicle stopped behind me, of that person being rear-ended. Subaru never notified me of the pattern of TCV failure, and, instead, internally extended a warranty on the part for affected vehicles for 15 years or 150,000 miles. A recall and replacement is needed to prevent a potentially highly serious accident.

NHTSA complaint #11746815 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

stalling/shutting down at stoplights with the auto start-stop feature has occurred continuously for the last 2 years I’ve taken to dealer, and multiple mechanics and they can’t find a problem

NHTSA complaint #11722571 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

My son, [XXX] is currently driving this car. The car only has 29,200 miles so far. Last week, while at the stop light on the hill, he had near fatal accident! Forester suddenly completed shut down. The only functioning part was the brake. My son had to put the car in park and restart the engine. I reported the incident to customer advocate at Subaru and taking the car in for inspection. We never skip any scheduled maintenance. My next maintenance not due until April. I also purchased Subaru safety monitoring software. The car never shows any malfunction. It’s a very serious issue. We strongly suspect it’s related to the start-stop system on this car. We strongly support to override the system at consumer level giving their unreliability. Thank you for your attention to this matter. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11720770 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

While driving on public roads, all dash warning lights illuminated simultaneously. The instrument cluster displayed “EyeSight OFF.” At the same time, the electronic parking brake engaged / the vehicle would not accelerate and required me to stop and shift to Park. The only way to restore drivability was to turn the vehicle off and restart. This has occurred intermittently, including in traffic, creating a serious safety hazard for myself and surrounding drivers.

NHTSA complaint #11695397 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Good evening. My claim number for reported issues to Suburu USA is [XXX]. Issue; On 5 or 6 occasions our 2020 Suburu Forester vehicle stalled while we were driving it. The stall has happened both when we are stopped at a traffic light or slowing down for traffic or a traffic light or in one case, at a drive through. This is a safety issue as when we start to drive; the vehicle shuts down and the steering wheel locks up along with all dashboard lights coming on. Also, on at least 2 occasions a message came up to restart the car for our safety. Other cars around us were moving or had to wait for us which creates anger towards us and danger for other drivers if they try to drive around us. The issue has been ongoing since approximately July 2024. I am not able to add a MPH range below, but generally we are traveling 0-10 mph because we are usually braking or going from stop (at a light) and then trying to drive when the stall happens. The vehicle has been brought to XXXX XXXX in Hanover, Massachusetts each time and thus far, they have not been able to resolve the issue. Tonight, we dropped the vehicle off again due to the most recent stall that happened on Saturday [XXX] I have brought this to Suburu USA’s attention and other than the dealership trying to find the issue, not much has been done that I know of. I am hoping your office can inquire with Suburu because it is either an issue specific to our vehicle, or if not, there may be other suburus stalling out there which can lead to serious situations for other drivers. I feel compelled to report this because if there is a wider issue, it should be reviewed to protect others, INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11640522 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Unknown or auto stop-start On two occasions when I stopped at a red light (auto stop-start activated) the car stalled out when I hit the gas. There was a warning message that alerted on the dash as well as flashing lights and beeping. The only way to restart my car was to put it in park, turn it off, then turn it back on. These were both at heavily used intersections and I had to use my emergency lights to try prevent being rear-ended and both times I have struggled to quickly resolve the issue which caused danger to others as well. My car has been serviced and inspected in the last 2 months so I am unsure the cause. I had received no alerts or warnings on my car prior to these instances and assumed the first instance was a fluke. I have scheduled a service with a subaru dealer in the near future.

NHTSA complaint #11638887 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Stopped in traffic near a red light. The Auto Stop/Start was enabled and activated when stopped at the light. When the light turned green, tried to go, but the AS/S system failed. A “No Eyesight” warning flashed and disappeared; various symbol lights blinked. Car would not start, hazards would not activate. After 20-30 seconds, I was able to put the car in park and restart the engine (would not start before then). No battery or check engine lights had been on previously, up to date on oil changes, 35k total miles, and I had a quarter tank of gas. This was scary as I was stuck in the middle of the road with my children while cars behind me tried to pass on either side. Many people have reported this issue in Subarus and I’d like for this dangerous problem to be formally addressed.

NHTSA complaint #11620830 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

The Auto stop start feature on the car drains the battery and alternator too much. It shouldn’t be forced on consumers. If it was a feature I wanted to use I should have the option of turning it on not be forced to always turn it off since I don’t use it. The alternator has already been replaced under warranty due to this feature. Between that and the dealership saying it would be over $700 to replace the battery is ridiculous. Today the car died while at a stop and the battery is needing to be replaced.

NHTSA complaint #11618439 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Car shuts off while stopped at light. This has happened 3 times. I have taken it to Subaru service provider and keep being told nothing is wrong. Car must be put into park and restarted to work. It is unsafe. There are multiple reports online ([XXX] and [XXX] ) of people reporting the same issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11608337 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

CHECK ENGINE, FORWARD COLLISION WARNING, FLASHING "S"DRIVE, NO EYESIGHT, AUTOMATIC EMERGENCY BRAKING WARNING LIGHTS, ALL CAME ON AT ONCE AND STAYING ON. POSSIBLE THERMO CONTROL VALVE ISSUE - NEEDS A RECALL!

NHTSA complaint #11594248 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

1-16-24:car wouldn’t open and start; jump-started by AAA to dealer; dealer kept overnight & checked battery: said charge held, ready to go home. 1-30-24, 4 pm-ish: able to start n drive, but check engine& eyesight warning light came on- late in day, so didn’t drive to dealer. 1-31-24: car dead; jump-started by AAA again & drove to dealer. On 2-1-24, dealer sends a video & says replaced battery, but check engine light & eye sight warning light still on; investigated further & found there was a lot of water that had pooled under the passenger seat & caused some corrosion- I.e.: shorted out electrical system. I asked dealer to report to Subaru since this seemed like a car defect. 2-9-24- dealer says Subaru won’t repair it at their expense and it’s a 25 hour job & will cost a lot. Dealer wanted me to file a claim with my insurance, but car was not driven through rain, high water, or stored in a flooded garage or on a flooded street. The water in the car seems like a design defect on the part of Subaru.

NHTSA complaint #11572000 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

The thermal control valve stopped working. The car has <50K miles on it. The error also results in many/all of the safety systems being deactivated (no adaptive cruise control, no lane centering, no rear braking, etc.)

NHTSA complaint #11570852 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Driving my 2020 Subaru Forrester on 1/26/24, at night. Stopped at traffic light. Car started shaking, dash lights system lights came on. Turned off car and restarted. Car would not accelerate. Had towed to mechanic. Diagnosed as probable thermo regulator. Could not repair because part only available from Subaru. Called dealer who was not sympathetic or helpful. Told to bring in and leave. Would get to it when they could.

NHTSA complaint #11568214 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

When the vehicle comes to a stop light or a stop in traffic and the engine turns off the vehicle will stall. It then leaves me sitting in traffic trying to restart my vehicle thus leaving me in an unsafe situation. This happens more often than not.

NHTSA complaint #11557581 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

The Thermo Control Valve failed at 33,945 miles. Because of this, the heater, Eye Sight, Cruise Control, Lane Assist, and Collision Brake did not work. The engine was then only running at "Sport" mode. It did not regulate the heat to the oil and could've caused sludge. The problem was confirmed by a Subaru Dealer Service Shop. I only noticed this problem when the blue thermometer light came on the dash board. Usually I wait about 5 min and once the car is warmed up the light goes away. This time the blue thermometer warning light did not turn off and stayed on for the remainder of the trip. When the car was restarted on the same day the engine check light came on. Eye Sight, Lane assist and Collision assist lights were on.

NHTSA complaint #11557764 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Thermo Control Valve is the issue according to Subaru. This is apparently an issue as a quick google search took me to many forums of other owners/drivers experiencing the same issue. For me, I was stopped at a red light and my car performed an automatic engine off like normal, and as the light turned green I took my foot off the brake and went to press the gas but my car fully shut off and gave me several warnings that all of the systems were offline. I had to put it in park and try to turn it off and on again to get it going, but it was incredibly stressful for my car to lock up like that on a busy road. This valve causes errors that turn off all the safety features in the car which sounds like a huge issue.

NHTSA complaint #11545647 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

At a stop light, auto stop/start system shuts down the vehicle engine. When the light turned green, and I lifted my foot off the brake, the engine failed to restart. The dash will lit up .. check engine light, eye sight light ... etc will come on. I had to shift to park and restart the engine. I read that low remote battery can be a problem, I replaced the remote battery but it has not resolved the issue. Engine failed to restart at stop light after being shut down by auto stop/start system multiple times in last six month. Only recourse is shift to park and restart the engine. This seems to be manufacture problem with auto stop/start system. It is a safety issue for me and my family having a stalled car at stop light due to engine being shut off by auto stop/start system and failed to restart until put in park and restart it.

NHTSA complaint #11543805 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Windshield cracked for no apparent reason.

NHTSA complaint #11537093 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

My wife was out this morning meeting friends for coffee. She gave a friend a ride home and she noticed a crack in the windshield on the drivers side. There was no indication that it was hit with a rock or anything else. I see that there was a lawsuit against Subaru for defective windshields.

NHTSA complaint #11527760 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Thermo control valve needed replaced. Check engine light and all safety lights turned on. All safety features were disabled when light came on. Subaru has has a recall on 2019 but not 2020 .

NHTSA complaint #11526028 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Firestone Wauwatosa, WI told me I need to have them recalibrate the Driver Assist System as part of an alignment I took the car in for on 5523. This added $125.00 on top of a $209.99 cost for the lifetime alignment cost. Laura, in the service department at Zeigler Subaru, Kenosha, where we bought the car, said this would only have to be done if the car had been in an accident. Not knowing what is actually required leaves me feeling unsafe.

NHTSA complaint #11521465 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Windshield cracked with out any other related damage. No rock chips or other damage. While sitting still windshield popped and a small 1/2 inch crack started on the edge of the glass and spread all the way across the windshield. Subaru clames there is no coverage even tho there is no damage to the windshield

NHTSA complaint #11499079 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Windshield keeps cracking as if unable to withstand regular road conditions that other vehicles/windshields for vehicles with the same capabilities and from the same brand (but different models) can. Windshield for my vehicle has been replaced once but will need to be replaced again, each time with an oem part

NHTSA complaint #11484331 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Windshield cracked, what appears to be originated from the inside near the heating coil. Has spread horizontal about two-thirds of the windshield. Available for inspection upon request. Has not had any inspections yet. Can inhibit the eyesight if continues to spread.

NHTSA complaint #11479198 — an unverified report by a vehicle owner.