What 831 owners told NHTSA about the 2019 Subaru Forester Wilderness

Engine lost power and was misfiring while many warning symbols appeared on the dash. There was a divider separating the lanes. The car coasted to almost to a stop, but the engine chugged enough to slowly turn left at the first opening in the divider and just barely made it off the main road. The engine stopped. I restarted it several times. The engine was misfiring barely running. The electric brake was applied on its own. The car did not respond to moving the shift selector out of park, so the car was immobilized. I put the 4-way flashers on and called AAA. There seemed to be no way for me to move it out of park or release the electronic parking brake. AAA could not respond quickly and suggested I call the police to divert traffic around my car for safety which I did. The tow truck operator was able to disengage the wheels and was able to flatbed it to the nearest repair shop. This being Saturday 1/3/26 it wasn't until Tuesday the repair shop determined the car would not run long enough to provide a reliable diagnosis due to the multiple trouble codes coming up on the computer analysis. I had the car towed to the nearest Subaru dealership who replaced the thermos control valve under their warranty extension. The dealership said usually when this part fails it just triggers a check engine light and not the dangerous situation I experienced. I believe a recall to replace this part should be issued on all cars with this defective part as its failure can cause a dangerous situation without warning.

NHTSA ODI 11709593

The contact owns a 2019 Subaru Forester. The contact stated that while driving approximately 70 MPH, the Forward Collision Avoidance system activated, and the vehicle immediately decelerated to 56 MPH. The failure was intermittent but had occurred several times over 5 years. The contact had to manually turn off the Forward Collision Avoidance system to avoid the failure. The vehicle was taken to the dealer, who was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was unknown.

NHTSA ODI 11700763

While I was driving on a major road, the car appeared to sense an issue and automatically started to brake. While I was a road with 55mph drivers, my car was forcing me to stop. May warning light appeared; Eyesight Issue, Check Engine, Brake and many others. I was able to disengage the crash prevention manually and continue to drive. When I took it to my mechanic, he told me all the codes went to a Technical Service Bulletin for the Thermo Control Valve. He reset the codes and told me to take it to Subaru for an under warranty repair. Once I left the mechanic, I was travelling home and the car had the same issues, again while driving on a very busy road. This time I could not disengage the system, and I struggled to get the car over to the left shoulder. It was very narrow, and not safe. I ended up having to have the car towed to the dealer. The dealer did fix the car, under warranty. However, twice I was caught on busy roads in a very dangerous situation. I am very glad that I was not injured, nor those that came to rescue me. But this should not have happened. The Technical Service Bulletin was issued on April of 2024 and I had no idea.

NHTSA ODI 11694543

During severe stop/go, thick, holiday traffic on I-495 (DC Beltway), during daylight hours, once AGAIN (this has happened several times before), the auto engine shutoff feature catastrophically malfunctioned, turning the car off, and simultaneously, activated the entirety of the dashboard to flash on/off, causing nearly every indicator light to come on, and then had difficulty restarting. This has been brought to Subaru's attention multiple times and they essentially have washed their hands of it and stating since they can't duplicate it, it essentially must not be occurring and they cannot repair it.

NHTSA ODI 11663006

Auto start/stop shut off engine at drive thru line. Locked up brakes and could not get it to unlock and restart car. It has happened on a number of occasions. After multiple attempts trying and letting it sit for a couple of hours, somehow got it to unlock and start. Thank goodness we haven’t gotten into an accident

NHTSA ODI 11652823

I got in my vehicle after getting gas. I was on my way to Neosho, MO, hundreds of miles from home. Thes lights were all on and I couldn't get them to go off. I figured it was because my windshield was dirty. I turned my wipers on to find out one needed replaced. I paid $30 for 1 since I have an odd type of wipers and I had been to 3 auto stores to find it. The Eye Sight, brake, check engine, air bag, and lane assist lights never went off. Now they come on randomly and go off randomly. This causes all safety features to not work. No adaptive cruise control, nothing. I finally got them to go off somehow the day I came back home. I live nowhere near a Subaru dealer. It had no other effect on my vehicle as far as I could tell. Now when they come on. I pull over until they come back on or have to drive it home to sit.

NHTSA ODI 11647079

Improper glass installed by safelight adas unable to be calibrated

NHTSA ODI 11607120

4/2/2024 at 5:30am my Eyesight system flashed a message in orange that the Eyesight system was off - not temporarily disabled. This is NOT due to an obstruction of the cameras by weather/glare/dirt etc. All functions controlled by Eyesight including lane departure, adaptive cruise control, and forward emergency braking, as well as reverse automatic braking are disabled by this malfunction. I removed the negative lead from my battery in an attempt to reset the system which did not clear the error. No check engine light accompanied this error and all other systems seem to be functioning normally.

NHTSA ODI 11580717

Thermo control valve failure, P26A3 code, eyesight safety assistance warning light ,check engine light, pre collision braking light, lane assist light.

NHTSA ODI 11579121

All of a sudden, the eyesight and collision prevention stopped working, the check engine light came on, the blue light thermostat indicator came on. We had no heat. The flashing "S" (sportsmode indicator) came on. We were driving on the highway and still over an hour from home. It was snowing, we could not adequately clear the windshield of fog so our visibility was severely compromised. We lost all Eye Sight capability which meant that we were vulnerable if there was ever a crash or an obstruction in the roadway.

NHTSA ODI 11562800

The Eyesight feature went out and the heater went out and I took the car to a mechanic and he said it had a faulty thermo control valve that needs replacement.

NHTSA ODI 11559750

The check engine light came on and all of the eyesight components on the car were disabled as I was traveling down the highway at 70 mph (this included the adaptive cruise control, the lane departure warning, forward collision warning, etc). In addition, the engine thermostat light came on and the heater and defroster stopped working. It was cold and rainy and the window started to fog up and I was unable to clear it without a functioning defroster. This was definitely a safety issue and I had to stop driving. The car was taken to a subaru dealer today and diagnosed with faulty thermo control valve. The technician told me the car should NOT be driven in this condition due to the problem being in the engine coolant system. This is a known issue on the 2019 Forester, and other Subaru models as well, and has a TSB originally issued in Sept 2021. (#09-80-21) My car has 70K miles and therefore is just out of the warranty period. I will have to pay over $1500 to replace this part and because it is a safety issue I have no choice but to pay for the repair. It is a part that is known to be defective and I am requesting that a recall should be issued before others are also put in potential danger and/or forced to pay large sums of money to get it fixed.

NHTSA ODI 11553451

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.

NHTSA ODI 11551424

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.

NHTSA ODI 11548626

Check engine light is on and the heater control valve needs to be replaced. This part is on back order because so many vehicles need to have this replaced and it turns off all the safety features of the vehicle. This is unsafe, faulty and putting loyal Subaru drivers in a vulnerable position. This part needs to be a manufacturing recall as to replace out of pocket is close to $2,000 and only effects the AC but impairs the safety of the driver.

NHTSA ODI 11546392

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.

NHTSA ODI 11543395

We were driving our vehicle westbound on U.S. Route 24, between Fairbury, IL and Chenoa, IL on Saturday, July 15, 2023 around 7:00 PM. We were travelling at approximately 55 to 60 mph when the brakes engaged suddenly and brought us to an almost immediate stop. This happened so quickly that it destroyed out transmission, cv joints and brakes. Had we not had out seat belts on, I feel certain that we would have been ejected. If a vehicle had ben behind us, I have no doubt that it would have collided with us. Immediately following the incident, the vehicle, which was now immobile, displayed the Eyesight warning on the instrument panel.

NHTSA ODI 11534336

As a result of code P26A3 (engine coolant bypass valve), the cars Eye Sight system is turned off as well as lane departure, reverse automatic braking, and pre-collision braking system. While code P26A3 may in fact refer to a serious problem with then engine, there is no reason why a safety system should be shut off!

NHTSA ODI 11533948

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

NHTSA ODI 11531679

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

NHTSA ODI 11530470

2019 Subaru Forester Premier. 6/29/23 All ok while driving for 3 hours on highways. Never had any issues before. I stopped car to take a break, when I restarted the car. All the warning lights lit ou and eye-site was off and could not be turned on. Check engine light on along with many others. Had 30 minutes more to go, stopped a few more times to check on the engine compartment - all ok. Brought it to the dealer today, 6/30/23, they were going to need 4 hours to replace a Thermo Coupler Valve? Issued a loaner car, and said Subaru will cover it under warranty even though it has expired. Only 24500 miles on a 2019 Forester.

NHTSA ODI 11529846

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.

NHTSA ODI 11529493

Was driving in the right-hand lane on the interstate with the cruise control set, went to change lanes as I was approaching a slower moving semi truck going up an incline. Cruise control deactivated with no inputs from myself. Vehicle began to decelerate. Looked at instrument cluster, the Check Engine Light was on along with Eye Sight Off symbol. Additional symbols for forward collision avoidance and rear active braking were also on. No warning signs were present prior to the cruise control turning off. The unexpected loss of power increases the risk of collision while traveling on the highway. Vehicle was taken a Subaru dealer, diagnosed with code P2682, Coolant Bypass valve performance, with a recommendation to replace the coolant bypass valve.

NHTSA ODI 11528479

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.

NHTSA ODI 11525953

First problem was eyesight was not engaging. Had diagnostics run and they said there was no problem. That problem continued. Second problem was when I was sitting at a red light. When the light turned green and I started to go, Eyesight engaged and totally shut the car off. It had to be placed in Park and restarted. Dealer said they have never heard of this. Internet says it's a problem. I had contacted Subaru headquarters after 1st incident. They paid for diagnostics, but would not respond after I contacted them to say it continued. Dealer and headquarters blew me off.

NHTSA ODI 11525444