2019 Subaru Forester UNKNOWN OR OTHER

The Thermal Control Valve on my Subaru Forester failed while I was driving recently. The failure caused the car to stop while making a turn. It was a very frightening experience. Luckily at that time the traffic was light. The car was towed to a Subaru dealer, and the Thermal Control Valve was replaced at no charge because Subaru extended the factory warranty. Subaru should have had a Recall Notice put out because this problem could cause serious bodily injury.

The auto stop/start feature occasionally causes the entire vehicle to totally shut off. This happened 3 times 2 years ago and I was to it was a low battery. On 10/4/25, the car is stopped at a red light on a four lane highway and when my wife stepped on the gas to start, the vehicle totally shut off. After panicking, I helped her turn the electronics on in order to start the flashers, then move the vehicle from drive to park, and then restart the vehicle. With cars moving at 55 miles an hour toward a green light we were very concerned about getting hit from behind. Luckily, we were not hit. The Subaru dealer then suggested the problem might be the ECM and they charged us $203 for a software update. It is not clear what causes this total vehicle shutdown but it is a significant safety issue that puts the vehicle and occupants at risk. I hope the Subaru engineers have identified and fixed this issue in future models.

Cracked windshield - Subaru windshields are weak and crack easily. I've been driving 45 years, never had a cracked windshield. I bought a new 2019 Subaru Forester and have had 3 cracked windshields. Ridiculous and dangerous. They need to be recalled and pay for replacements. The first crack happened about 1 1/2 years after purchase, I took to dealership for replacement and paid ~$1,200. Then second crack was a star crack, and I had it sucked out/fixed (~$250). And now, vehicle is 5 years old 45k miles on it and has a huge crack in the middle of the windshield in front of the passenger side.

Since I purchased the vehicle, I have experienced recurring problems with the starter system, affecting the car's performance and reliability. Despite receiving regular maintenance and being evaluated at the authorized Subaru dealership in San Juan, Puerto Rico, the issue remains unresolved. I was informed that even if I replace the part with a new one, the failure could continue, as the component is still being manufactured under the same part number. As a preventive measure, I also replaced the battery to rule out a possible cause, but unfortunately, the problem persists. This is particularly concerning because the car has shut off in the middle of traffic, at intersections, and while waiting at traffic lights, which poses a serious safety risk to me and other drivers. I understand that this issue may be common among other vehicles of the same make and model, and I respectfully request that it be investigated as a potential case for a technical service campaign or safety recall. Additionally, I ask that my case be reviewed for a goodwill repair, as the issue has been present since early in the vehicle’s use—even if the standard warranty has expired. I look forward to your response and to a fair and timely resolution. I sincerely appreciate your attention and assistance in this matter.

cracked windshield

The rear window glass imploded while on the freeway. This created a loud bang noise and sent small pieces of glass throughout the passenger cabin creating a substantial distraction.

My windshield mysteriously cracked there was not existing damage. When I research my car's make model and year I learned that there was a class action lawsuit that was settled that requires Subaru to cover the cost of the windshield. At the time of purchase this defect was not disclosed to me. I reached out to the dealership and they seem to have no knowledge of this. Additionally, they are not taking any responsibility.

We were driving in 6 lane traffic in Atlanta and the traffic came to a stop. The Subaru Auto Stop Start turned off the engine. When the traffic started and I released the brake, the engine would not start and the battery died trying to start. This left us in the middle of 6 lanes of traffic with a dead car. It was a significant personal safety issue. Luckily were were on a slight down slope and was able to have the car start rolling forward while in neutral and made our way to the shoulder, with cars passing at 70mph and narrowly missing the car. Prior to this, the vehicle was working properly. This is the 5th time we have had issues with the Subaru restarting after the Auto Stop Start turned off the engine. All prior times we were able to start the engine but had to turn off the car and then turn it on again. There is no way to turn off the auto start feature permanently, having to remember to turn it off each time you get in the car. There is also to no built in feature to not have the Auto Start Stop not turn the engine off if the battery health is not 100% and there is a chance it will not turn on again. It is a significant safety issue not having a permanent way to turn off the auto on off feature or have the car disable the feature if the engine or battery are not 100%.

When I am stopped at a traffic light or stop sign, and I have not manually turned off the auto stop-start feature, from time to time the car will not start when I depress the gas. Often this is accompanied by a screeching sound - the sound the car makes if you try to shut it off when it is in gear. The danger is that I cannot move the car forward without putting the car in park, turning the engine off, then turning the car/engine on, and then depressing the gas. If there were no other drivers on the road, this would be an inconvenience but not a safety hazard. But there are other drivers who have no idea why I am not moving forward and they get impatient and try to pass me in areas where drivers coming in the other direction do not expect it. I have witnessed several near accidents. I have taken it to the dealer who cannot reproduce the problem but an internet search reports many other Suburu drivers who have experienced the same problem.

At 70594 miles TCV (Temperature Control ) failed Check engine light came on and sfety features like eyesight were disabled. Subaru has known for a couple years these valves were bad and redesigned them for replacement. Because I was out of warranty it cost me over 2100 dollars to get it repaired

2019 Subaru switched from a thermostat to a "Thermo Control Valve" (TCV). They eventually redesigned it in 2022 due to so many failures. Mine failed rendering the cars "eyesight", lane assist, cruise control and brake assist useless. Check engine light and oil temperature light remain on. Engine code is P26A6 and P26A5. Subaru has known about this issue for years yet charge $600 for the new "Thermo Control Valve" and $1,000 to install it. These "TCV" valves fail indiscriminately with mileage not being a factor, rather the product itself. Any search online and you will find hundreds (if not thousands) of people affected in and outside the warranty. No recall has been given.

2019 Subaru Forester with 38,000 miles. Heat stopped working. 30 minutes later, check engine light came on. Warning on dash stating that Eyesight cannot turn on. Lane assist and adaptive cruise control will not turn on. Mechanic found it needs the Thermo Control Valve replaced or the car will have no heat and the engine can overheat. Quoted a $2,000 repair cost and 3 weeks before we can get the part.

This is the second time I am reporting this issue in the past few months. Three times this week my car has gone into the "gas saving" mode at a stop sign or red light and has not turned back on. I get a warning and need to turn the car off and then back on. This has put me in very u safe situations as people assume I'm going to start driving once the light changes and I've been nearly rear-ended multiple times, screamed at, cursed at, etc. This has happened an uncomfortable amount of times and I think you should do an investigation before I, or someone else gets hurt!

Thermo Control Valve went bad causing car to have no heat in the cold can’t use the defroster for windshield and no safety features Subaru knows about issue but not recalling it leaving us the high service payment

I came out to my parked vehicle to find a large crack on the windshield.

Car would not restart after engine turned off multiple times at intersections. All warning lights came on. Had to turn off vehicle completely and restart. Very dangerous. Required new battery

While driving on the highway my car started to stall and rough idle, It wouldn't drive past 2 rpm sometimes less and would stall. My car constantly stalling made multiple cars/semi-trucks almost hit me and cause them to swerve. The problem was confirmed to be the thermo control valve eroding, which Grayson of Subaru verified. The manufacturer inspected it and confirmed this needed replaced. The only warning signs or messages that appeared appeared after the vehicle stalled when the check engine light, and all lights on the dashboard lit up. Subaru of America has even admitted that this is a problem and offered to pay part of the cost to fix it, therefore knowing they are at fault. They have said they would email me/contact me but haven't returned any correspondence.

All side windows and the sun roof have become scratched. This vehicle is garaged, has 28,000 miles and never goes off road. The scratches extend into the door gasket area thus reaching to very top of the glass. Scratching of the windshield and rear window do not show this. We use a touchless auto wash. The paint is near flawless. There are no such scratches. I believe the glass is defective. We also own a 2015 Subaru Forester. it does go into dirt and grit. The side windows have no such tendency to scratch.

Thermocontrol valve failure. Part failure common to this vehicle make and model. Part has been repaired at this time. However Subaru is aware of the part failure reference service bulletin DTC # P2682 & P26Ax** / Thermo Control Valve – Design Change. Number: 09-80-21. Date: 02/28/2022. I believe this should be a recall as it is a part failure. If valve fails while closed prevents vehicle operation and can cause unexpected vehicle breakdown in traffic.

BATTERY DRAIN ISSUE: WE purchased 2 batteries within 2022, and it keeps dying. We understand there may be some type of class action lawsuit related to this issue as it seems to be fairly common.

Several times I have needed to jump start my battery. Most recent incidence: I parked and was waiting to get out of the car. I turned back on the Car after driving for 15-20 minutes, but did not turn on the engine. The car ran for about 2-3 minutes and then turned off to get out of the car. I was away from the car for 3-5 minutes and when I went to start it, the battery was dead. I can not leave the door open to bring in groceries or the battery dies. Or, I cannot open the doors to clean out the car because the battery will die.

Vehicle suffered sudden and extensive crack in the windshield. No impact caused the crack. The crack stared from the bottom.

The following has happened 3 times in the last year. While stopped and waiting for the light to change, my foot on the brake, damp outside, car stalls, the engine shuts off, eye sight flashes on dash stating eye sight off. I have to put the car into "park" and restart the engine. This is quite scary! I have taken the car to 2 different mechanics to check the battery - which shows the battery is 100% okay. The contact has stated that when the problem occurs, they have to put the vehicle in park and restart the engine.

Over the weekend, the check engine light came on and I lost heat in my vehicle instantly (like flipping a light switch) after already driving with full heat for about 30 minutes. In addition to losing heat on a zero degree day, the vehicle also lost the capability to circulate and redirect coolant to the engine properly, causing a significant reduction in engine temperature causing it to run nearly 100 degrees Fahrenheit less than optimal running temperature. Upon research, the only logical explanation was the failure of the "thermo control valve" which was added to the Subaru lineup starting in 2019, and this was just confirmed as the cause of this incident by the dealer. While coolant issues previously were managed easily in other vehicles, or a slow reduction in the ability of the heating system, having an electronic component control the diversion of coolant in the car for cabin heat and engine heat control seems to be harmful, not only potentially to the engine, but causing the heat to instantly stop to someone that may not be dressed to deal with it while driving in zero degree weather can cause potential significant health problems. This part should not be the sole source of control, let alone be failing without warning after a mere 3 years. In addition, a quick search online provides no information on the product, but many threads of individuals experiencing similar issues, as well as comments that Subaru has recognized it was originally inadequately built and have since produced a more Hardy product to replace them with. The other issue with this part, is that it is below the intake which needs to be removed to replace it. While the intake and other coolant system items are mentioned under warranty, this part is never mentioned. For this being a new addition starting in 2019, it is deeply concerning that there are many accounts for this, with no official messaging from Subaru, for such a critical part.

We have had two windshields crack for no apparent reason in this car.