I own a 2019 Subaru Forester. Approximately 5 months ago, I experienced a failure in the auto start-stop feature. My car intermittently shuts down when stopped at traffic lights or in the middle of an intersection. Subaru conducted a diagnostic assessment to address the issue, but they couldn't identify any problems. This has happened about six times within the last five months. They claim to have never encountered this issue before. The temporary solution is to turn off the car and restart it, which is not safe when it occurs in the middle of an intersection. Following my dealership's recommendation, I replaced my battery with a standard EFB battery, However, the same issues persisted. Notably, the problem consistently occurs after driving on the highway for approximately 60-80 minutes and then coming to a stop at traffic lights. It is evident that the issue is not related to the battery. This issue raises significant safety concerns, especially when making left turns after coming to a stop at intersections. The sudden shutdown of the vehicle in the midst of an intersection can pose a substantial safety risk to both the driver and other road users. It not only creates a hazard in terms of traffic flow but also increases the likelihood of accidents and collisions. Given the critical nature of this safety concern, it is imperative that the problem be promptly addressed and resolved to ensure the safety of all road users.

- Dayton, OH, USA

The temperature control valve (TCV) has gone bad and so the check engine light is on and reverse automatic braking and the Eyesight system is disabled. The problem with the temperature control valve is unrelated to the safety systems, however, when this valve goes bad, these safety systems are disabled automatically.

- Naperville, IL, USA

Three times in the last week or so, coming to a stop, in traffic, the car throws a warning about the EyeSight not working and it shuts the car off. The first time I was still rolling and had not come to a stop. The other two times I was just barely stopped and it happened. It would be horrible if it happened while driving fast. You have to put it in park and hit the start button to turn the electrical off and then hit the button again to start the car. Windshield is clean. No visible obstruction to the camera system. Clear weather every time. No rain. Daytime driving.

- Lawrenceville, GA, USA

This is a follow up from previous complaint 11525953 dated 6/8/2023. My subaru forester stalled again on 8/2 at an intersection after 15 minutes of driving, and then again on 10/4 at an intersection after 45 minutes of highway driving. There are no warning signals or any indication of engine problems. I replaced the air filter in June hoping that might solve the issue.

- Elkridge, MD, USA

4 days ago my Check Engine light came on. In my car, when this happens, it disables all Eyesight features - collision warning, lane departure warning, etc. Work hours being what they are, I drove home that night and back to work the next day with it on. I managed to get it scanned when it popped a code for the Coolant Bypass Valve. Searching that code online lead me to DOZENS AND DOZENS of forums, posts, stories of the same code popping up on other 2019-2020 Subaru's. They all had to take it in for a hefty repair. It also led me to a Service Bulletin issued last year, which showed that Subaru had rebuilt the TCV so it could withstand corrosion, unlike the previous version. So naturally I took it into my local dealership to have it looked at, and sure enough - the TCV needed to be replaced. WHY HASN"T THIS PART BEEN RECALLED YET"?" Given there is no thermostat on my cars dash, I would have no clue whether my car was overheating due to this faulty valve, until its too late. It seems like this is a big potential safety issue that Subaru needs to address, and someone needs to force their hand.

- Fairfax, VA, USA

1. termal control valve 2. traveling out of state and engine light came on 3. warning light (check engine was on) 4 confirmned by dealer 5. all lights on dash boards

- Westborough, MA, USA

2019 subaru forester failed thermo control valve. There are literally 1000s of complaints on this issue and SOA refuses to issue a recall. Subaru has issued a bulletin to replace the faulty design with redesigned part. When this fails the car goes into limp mode and all lights come on. Very dangerous and quote frankly completely irresponsible that subaru refuses to recall this failure. I am out of warranty and it's minimum 2k to fix. I have a 2019 vehicle parked that I can't get Inspected and can't afford to fix because Subaru of America is trying to save money. Just a matter of time before this causes a tragic accident before they own up to recall.

- Georgetown, TX, USA

Thermo control valve needs replacing at 34k miles. Not covered under warranty. Also needed new tires at 30k miles and now faulty ignition coil

- Gainesville, FL, USA

Thermo Control Valve malfuncitoned, causing check engine light to come on. Car only has 72k miles on it, so dealership (McDaniels Subaru, Columbia. SC) said they couldn't repair under warranty. Even though car has 100K powertrain. To get to this part you have to remove intake manifold, so I don't see how it's not considered part of the powertrain. While Check Engine light is on, NONE of the safety features of this car function. From Internet research, this part is going to fail, (part has been redesigned due to this), it's just a matter of whether it fails within your warranty period or not. Mine was not.

- Pelion, SC, USA

On our way to a vacation in NJ, we were driving on the expressway and a deer jumped over the rail into the hood of the car. The car immediately started to smoke ( dark black). We got out of the car, retrieved two luggage bags, and the car burst into flames. All within 60 seconds of hitting the deer. About five years ago, same thing happened to my daughter driving a Subaru WRX-??. Twice in the same family-??.no recall?

- Hammondsport, NY, USA

My wife was driving her 2019 Subaru Forester (purchased new) and the Eyesight disabled and the check engine light came on. The car was still running, but not as it normally would. It had less power but would still maintain the speed limit. At home the car idled differently, like it was running too rich or too lean. The exhaust also smelled funny.

- Fort Valley, VA, USA

My thermo control valve went out while I was on the highway. My car lost power and all safety features. It-??s been replaced but should be a recall.

- Dillsburg, PA, USA

Dear National Highway Traffic Safety Administration, I am writing to report a safety issue with my 2019 Subaru Forester, which I believe may affect many other Subaru vehicles as well. Specifically, I have experienced a problem with the thermo control valve, which has caused the EyeSight safety features to be disabled and potentially poses a safety risk. I first became aware of this issue when the EyeSight safety features on my vehicle were automatically disabled due to a malfunction. I brought my vehicle to a Subaru dealership for an inspection, and they determined that the thermo control valve was faulty and needed to be replaced. It was alarming to learn that many other Subaru owners had experienced the same issue, and some had even experienced engine failure as a result. The EyeSight system is a driver assistance technology developed by Subaru that uses cameras and sensors to monitor the road and surrounding environment, alerting drivers to potential hazards and providing automatic braking support if necessary. This technology has been recognized as one of the most advanced driver assistance technologies available, and is designed to help prevent accidents and reduce the severity of collisions. The EyeSight system includes features such as adaptive cruise control, pre-collision braking, lane departure warning, and sway warning, which work together to provide a comprehensive safety package for drivers and passengers. These features are critical in keeping drivers safe. I am concerned that this issue may be more widespread than initially thought, and that it may pose a safety risk to drivers and passengers of affected Subaru vehicles. The faulty thermo control valve can cause the EyeSight safety features to be disabled, which can lead to reduced safety performance, accidents, and potentially harm to drivers and passengers. Sincerely, Davide Alves

- Somers, NY, USA

Over a dozen times now, when at a traffic light, the automatic on/off feature turns the cars engine off. When you take your foot off the brake to reactivate the engine, there is an EyeSight Disabled warning and the car stalls and fails to turn off. You have to turn the car completely off to restart it. I have previously brought the car into a Subaru dealer for servicing after this happened. It has continued happening since then.

- Maple Glen, PA, USA

The TCV Thermostat Control Valve has failed which is a known issue and Subaru is very aware. The vehicle will ultimately believe it is overheating and shut itself down. This is a very well known incident and should be a proactive recall but instead subaru insists on waiting for customers to fail and hope its outside of warranty so they can charge them $2k to replace a known faulty design and part.

- Georgetown, TX, USA

When I turn the car on it flashes check engine eyesite failure which then turns off the ability to use cruise control, crash detection, lane assist, ext. we called Dick Hannah Subaru and the code came up as P26A5 engine coolant bypass valve A position sensor. They said a thermo valve needs replaced and they-??ve seen that happen a lot in 2019/2020 Subarus

- Battle Ground, WA, USA

RAB disabled, eye sight disabled, I drive disabled, check engine light came on. Car drives like it's is in sport mode with very touchy throttle. Pulled a code and it's the TCV. It's a known issue by Subaru with a part that has since been revamped but with thousands of vehicles on the road affected. Should be a recall. Contacted Subaru of America with no response so now a $1,900-$2,500 depending on dealer cost is being pushed on the consumer. Vehicle currently has 80,000 miles but as a Subaru ambassador I used to put a lot of miles on going to events, meets and typical camping and outdoors activities you expect out of these vehicles so my milage is slightly higher than the normal work commuter.

- Chattanooga, TN, USA

According to an inspection from the Subaru dealership, my thermo control valve failed. Because of this, the check engine light came on and my safety "eyesight" feature (automatic breaking/collision prevention system) was disabled. This first occurred after starting my car after a visit to a park 2 miles away. When this occurred, I drove my car home and parked it until I could get it in to be inspected at the Subaru dealership who pinpointed the problem. Besides a quick check from AutoZone, this is the only representative that has inspective my vehicle.

- Camden, SC, USA

Multiple incidences approximately 8 since 2022. Stopped for 8 months with new battery. No issues are recorded in the computer in any of the troubleshooting visits. Normal Sequenced of events: Stopped at a stop light, Start/Stop engages, take foot off brake, start providing gas, car stalls, dashboard lights up, alarms, provides instructions to place the car into park and restart, and the car restarts after that is performed. Danger situations that this has caused: Aggressive car behind not paying attention to the stall and Green light with no one behind and car coming up behind quickly while you are attempting to restart the car. As this cannot be disabled without modification to the car this created a dangerous situation.

- Cary, NC, USA

Driving home for 15 minutes. parked on left turn lane, slight incline. when traffic light turned green, i stepped on the gas and the engine stalled. I remember seeing "eyesight disabled" warning light come on. I put vehicle in park, shut it off, and turned engine back on. I was able to drive home. possible system failure - fuel system, auto/stop feature? yes, available to inspect safety - 5:30pm heavy traffic on 4 lane highway0. blocked traffic turning left. no where to pull over. have not taken vehicle to mechanic or been inspected. I saw no warning lights prior to vehicle stalling, or experienced any engine anomalies.

- Elkridge, MD, USA