2020 Subaru Forester Complaint Log

I was on cruise control, and it randomly decided to go 81 MPH instead of 50 mph i set it to, it did not respond when I tried to turn off the cruise control, and I ended up crashing into a semi, I survived but my [XXX] daughter died. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The thermo control valve malfunctioned causing the check engine light to come on which shut down all the safety features in the vehicle including the front eye sight camera, blind spot warning, the rear automatic braking, lane departure warning, adaptive cruise control, and lane keeping assistance.

41k miles P26A3 P26A5 ****Eyesight disabled*** ***Forward collision disabled *** Failed TCV and dealer will not cover because warranty period is over.

Vehicle continuously suffers a total loss of power (engine shuts off) while driving, creating obvious hazard to the user of the car and other drivers. This continues to happen without warning and often while driving through intersections and other dangerous situations. No warning lights precede these events. We brought the vehicle to the Subaru dealership and, after testing/diagnosing the problem, they informed us the vehicle needs a larger battery (which also requires installation of a larger battery tray) than the one that came equipped with the vehicle from the manufacturer. No aftermarket modifications have been made to the battery or electrical systems and the current battery is the size and type recommended by Subaru in the owner’s manual; the dealership, however, advises that that battery is insufficient and needs to be changed for a larger-sized battery.

The contact owns a 2020 Subaru Forester. The contact stated that while driving at 55 MPH, the front driver's side windshield cracked. The windshield had developed a crack without impact. The contact stated that the windshield had previously been replaced by an auto glass company for the same issue. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was 64,000.

My vehicle has repeatedly required being jump-started after sitting for a period of time. Recently it has become a safety issue because the engine is designed to turn off at times in order to traffic to improve fuel efficiency. After research, Subaru has a known issue with the DCM system used to power the optional (subscription based) Starlink system. This system uses 3G signals to provide emergency assistance; however 3G signal has been decommissioned and the system is unable to connect to a tower and never stops trying. This creates a parasitic drain on the battery that can (and has) prevents the car from being able to restart from a stopped position.

Engine check light came on and after running a test it seemed as though the thermo control valve thermostat was not working properly which means the valve that lets coolant into the engine doesn't know what the temp is and when to release coolant. That ended up being the issue and we were barely under the 60k mile warranty for the powertrain so it was covered but I've been reading that it is a common issue and others are surprised it hadn't been recalled yet as it could cause the engine to overheat. The part is so defective that subaru has already designed a better part which means they know its a common issue.

Unintentional acceleration. After making right turn, vehicle accelerated for approx 1/2 mile until crashing into wall. Several attempts at braking and trying to shift into neutral did nothing.

I have had three cracked windshields within 4 years of driving and 30,000 miles

Windshield cracked for no reason shortly after purchasing. Needs to be replaced. Quoted 1500.00 because self driving feature must also be adjusted when replacing windshield

The thermo control valve malfunctioned causing the check engine light to come on which shut down all the safety features in the vehicle including the front eye sight camera, blind spot warning, the rear automatic braking, lane departure warning, adaptive cruise control, and lane keeping assistance. The check engine computer readout diagnostic trouble code was P26A5 "Engine Coolant Bypass Valve "A" Position Sensor Circuit Range/Performance". The vehicle was taken to a Subaru dealer who found the thermo valve performance was out of spec. This vehicle has not been recalled although the manufacturer replaced the part in 2021 vehicles acknowledging the valve was faulty. Because of the mileage on my vehicle, it was not covered under the warranty although many have been replaced under the manufacturer's warranty due to the failure of this valve under the 60,000 mile warranty. I believe this should be a recall item for others who experience this issue.

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.

Daughter was driving vehicle on the morning of September 15, 2023, when smoke came from under hood. Immediately pulled over and engine was engulfed in flames. Got out of vehicle and moved a safe distance away as glass started to break and fire department arrived on scene. Picked up vehicle on September 12, 2023, after having the thermal control valve replaced (warranty) but after doing research there are other components that also had to be replaced (fuel line, etc) as part of this repair. Noticed there have been other vehicles with recall due to thermal control valve just nothing on the Subaru Forester. Completely traumatized as the vehicle was gone in a little over 3 minutes. Have been in contact with Subaru but no resolution on what they believe caused the car to catch on fire. Did authorize them to get “black box” on September 29, 2023.

I’ve owned my Subaru forester for over a year now. About 6 months ago while getting off an exit and at a light, when I went to accelerate my car died. All lights came off and no power to vehicle. I was able to restart and drive home. Called the dealer took it in and paid almost $2k for repairs. Today the same thing happened on the turnpike in stopped traffic. This could have been a bad accident.

The car dies when it stops for a traffic stop. Sometimes it starts again and and sometimes it does not. It does not do it when the air is on. People honk at you in traffic if you do not start right away. I thought there was a recall on Subarus for same which is why I never bought one. The vehicle has been inspected. It also unlocks itself sometimes after I lock it.

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.

The contact owns a 2020 Subaru Forester. The contact stated that the windshield was cracked. The crack had developed on the passenger’s side of the windshield’s edge where the windshield meets the frame and expanded 6 inches horizontally. The contact had not taken the vehicle to the local dealer or the glass shop. The windshield was not replaced. The manufacturer had not been informed of the failure. The failure mileage was 8,978.

Was driving at highway speeds (65 mph) and within the posted speed limit and a small, unidentifiably small object was kicked up by a car in the adjacent lane and hit the windshield, resulting in a small ding that immediately spread to a large crack across most of the windshield.

The contact owns a 2020 Subaru Forester. The contact stated that the auto START/STOP feature was malfunctioning. The contact stated that upon coming to a complete stop, the engine turned off, but failed to restart after releasing the brake pedal. The message "Engine Disabled" was displayed. The contact depressed the brake pedal and pressed the Push to Start button and was able to continue driving. The contact stated that the failure had been recurring. The dealer was notified of the failure and advised the contact to manually deactivate the auto Start-Stop feature by pressing a button. The contact stated that she followed the dealer's instructions; however, the feature had been engaging independently and the failure had been recurring while at a complete stop. The vehicle was taken to the dealer to be diagnosed. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 39,000.

While I was traveling I stopped at a rest area and when I restarted my car, my panel lit up like a Christmas tree. All my safety assist systems were disabled and my check engine light came on. When I got home I had my mechanic run the codes and it came back to the thermo control valve. This happened on 8-29-2023. I researched the problem and Subaru put out a service bulletin in February 2022 but never notified me. My car is out of warranty now and am forced to drive without my safety systems because, 1- they don’t carry the part in stock and 2- the cost to repair is over $1400.00. Subaru was aware of the problem but kept it quiet. I feel this is a scam and Subaru should recall this part. I was warned that my car could die at any time. I bought it for those very safety systems as I am a senior citizen and rely on them now.

The thermo control valve malfunctioned causing the check engine light to come on which shut down all the safety features in the vehicle including the front eye sight camera, blind spot warning, the rear automatic braking, lane departure warning, adaptive cruise control, and lane keeping assistance. The check engine computer readout diagnostic trouble code was P26A5 "Engine Coolant Bypass Valve "A" Position Sensor Circuit Range/Performance". The vehicle was taken to a Subaru dealer who found the thermo valve performance was out of spec. The valve was replaced. This vehicle has not been recalled although the manufacturer replaced the part in 2021 vehicles acknowledging the valve was faulty. Because of the mileage on my vehicle, it was not covered under the warranty although many have been replaced under the manufacturer's warranty due to the failure of this valve under the 60,000 mile warranty. Through a "Goodwill gesture" Subaru replaced the part in my car at no cost. I believe this should be a recall item for others who experience this issue.

While driving, the 2020 Forester, the check engine light, collision light, eyesight function lights all went on at the same time. I brought vehicle to check diagnostics and it is showing Engine Coolant Bypass Valve "A" Control Circuit low in Power Train System. Their were no messages prior to all the lights turning on and I was able to bring into the dealer for oil change but not able to make an appointment for repair for a few days from now

For the 3rd time in less than 3 years my windshield crack from a small pebble hitting it. Either Subaru is making very thin windshield glass, or the material used is not sufficient to suppress small pebbles and causes the windshield to crack, often. The latest crack happened July 25, 2023 in the PM with a small 1/4 inch crack, by morning it had grown to over 2 feet. It seems to me there is a design flaw here.

The windshield suddenly crack for no apparent reason. I inquire about this problem from the Subaru service department and I was told that its not covered by warranty. I found out from my own research that a lot of Forester owner have complain of the same issue.

The contact owns a 2020 Subaru Forester. The contact stated that there was a chip on the front windshield that was not caused by an impact. The front windshield was cracked. The contact called the local dealer and was referred to an auto glass shop. The vehicle was taken to the auto glass shop that replaced the front windshield, but the failure recurred. The contact stated that while her son was occupying the vehicle, he noticed that the front windshield was cracked. The vehicle was not repaired. The manufacturer was contacted. The failure mileage was 25,000.

I was driving on a paved two lane rural route and hit a small bump in the road. Immediately, my check engine light came on and all the safety features turned off. Control panel showed multiple safety features off and the Sport mode indicator light blinking. My car only has 17K miles on it and I have had it just over a month. I was able to drive it safely home and when I called the dealership the next morning I was told I could continue to drive it until the service appointment six days later. When I got home, my husband checked it with his CEL reader and got the code for the temperature control valve (an issue known by Subaru). This was confirmed by the dealership and I was told after having driven it for several days that it should not be driven. The repair is being covered under the power train warranty.

The contact owns a 2020 Subaru Forester. The contact stated that while driving approximately 70 MPH, the accelerator pedal was depressed, and the vehicle started to lose motive power. The check engine warning light was illuminated. The vehicle was steered to the side of the road where the vehicle then stalled. The vehicle was restarted approximately 15 minutes later. The vehicle was towed to a dealer where it was diagnosed that the thermal control valve and electric water pump needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 13,000.

Error code (P26A3?)for - Engine Coolant Bypass Valve. Causes the "Check Engine" light to come on and automatically disables ALL of the safety and collision mitigation systems. The Engine Coolant Bypass Valve failure is common and a known issue and Subaru has already updated the part on newer vehicle models. The common failure of the coolant bypass valve should not be disabling the safety features and the collision avoidance systems.

Our thermo control valve (TCV) assembly failed and caused dangerous loss of speed and control while on the highway. Subaru is fully aware of the defect in their design as they issued a service bulletin to inform their service centers of a new, fixed TCV assembly that is retaining the same part number (a notice only sent to their service centers, NOT to owners). Please see attached. Despite being aware of the defect, Subaru has not voluntarily replaced the defective TCV assemblies or even bothered to notify owners. Instead, they are letting us put our families and other drivers in dangerous situations through sudden loss of control. There are pages and pages of other owners experiencing this dangerous issue and - like me - being surprised to find it's a known issue that Subaru is not proactively fixing (see any of the owner forums like subaruforester.org).

While driving on the highway, the engine suddenly stopped and several warning lights appeared on dash. Driver was able to coast to shoulder but could have been a bad accident. It happened again on the way to dealer service center. Dealer reproduced the problem and identified it as a faulty thermo control valve. Dealer fixed it under warranty. Review of web reports makes this seem like a common problem with various Subaru automobiles.

Windshield randomly cracked while parked. There was no hit to the windshield that was detected. Crack runs down middle of windshield.

My one year old is able to press the chest clip and it unlatches. So now the only thing holding him is the buckle. He has been able to undo the chest clip. While driving in traffic. This should not happen. Could be terrible danger if got in a car accident.

While driving on an Interstate highway the engine suddenly lost power and various warning lights lit up on the dash, including brake, eyesight, RAB. Managed to limp to the shoulder without getting hit and had the car towed to the dealer, who replaced the thermo control valve assembly under warranty.

(06/22) - Small pebble hits windshield and creates a "star-pattern" crack measuring 2.25 inches in diameter. Booked earliest appointment for windshield replacement on Tuesday 06/27. Have not touched windshield and have not driven vehicle as of this day. (06/24) - Waiting for windshield replacement appointment; star-pattern crack has extended aggressively overnight while parked under shaded carport (average temp 64 degrees), far beyond what is typical. As of 06/24 there are 2 long cracks extending in opposite directions measuring 9 inches above and 13 inches below original impact diameter. Please note that Subaru has had prior class action lawsuits filed for similar issues regarding brittle/unsafe windshields for Subaru Outback and Forester 2016-2020 models.

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.

In April 2022 after owning the car for 4 weeks the Eyesight went out. I was told it was due to the thermal control module. That was replaced. I’m n June 2023 the AC went out. They said it was the blower motor. That was replaced. In September 2023 the AC went out again. At that point they found the cause was actually a fully melted fuse box and fuses. They replaced the fusebox and the entire AC system. I have had 3 batteries in the vehicle since March 2022. In December 2024 they found that my car needed an update and the update friend the transmission controls module. Then the starter went out at the same time. After that was fixed a week later all the lights in my dash came on and there were no safety features running in the vehicle. I reach out to Subaru and I was told this was all normal wear and tear in the vehicle and it just happens. A melted fuse box and safely features just randomly dying on a 4.5 year old car goes deeper than that. There has been almost $12000 in repaired performed on this car and the ones remaining are undiagnosed as they have never seen the codes before. This is a mush larger issue and Subaru refuses to do anything.

While accelerating to merge in the freeway the Thermo Control Valve malfunctioned, causing check engine light to come on which turned off all the safety features (lane assist off, precollision off, RAB and eyesight off) of my Subaru 2020 Forester Sport. I’ve researched the internet and shows it is a common issue. I brought it to a subaru dealership and was told it is not safe to drive the vehicle. Since I just passed 60k powertrain warranty (around 62k), it is not covered and had to pay over $3,000.

While driving, I heard a loud POP. I thought something hit the car, but I was not close behind another vehicle or road hazard. For about 15 minutes I thought no harm, no foul. Then suddenly, I saw a long, mostly horizontal crack from the bottom left and extending about 18" toward the center of the windshield. I called the Subaru dealer [where I bought the car] and was quoted $910 parts and $590 labor, but they were unable to give me a service appointment date at that time. I don't feel the car is safe to drive, so I am looking for a quicker repair from an independent windshield replacement shop. At the same time, I researched Subaru windshield cracks and found numerous reports of easily cracking Subaru windshields. It appears that if I replace one Subaru windshield with another Subaru windshield, I may just be waiting for another Subaru windshield crack in the future.

Thermo control valve is bad. Ask subaru to issue recall on 2019-2020 models.

Windshield cracked for no apparent reason.

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 .

The contact owns a 2020 Subaru Forester. The contact stated while driving approximately 2 MPH down her driveway, she heard an abnormal popping sound coming from the dashboard. The contact observed that a crack had appeared in the center of her windshield that formed at the bottom of the windshield. The contact stated that the crack extended more to the passenger’s side of the windshield. The contact called the local dealer and was advised by the dealer to contact the insurance provider for assistance. The vehicle had not been repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 50,000.

This vehicle has approx. 45,000 miles and the electrical has failed. We have replaced the battery and tested all components in which they then operate fine. However overnight the battery fully drains, leaving us with no vehicle again. This vehicle has no accidents, maintained every 3 months and the health report even shows no issues/errors. No other symptoms have been noted. this car works and runs 100% like it did day 1 up until 3 days ago. Where it has died overnight every day. Luckily my husband is a mechanic as he indicated the last instance of a new battery going in, the dashboard was flashing and going haywire to the point that it wouldnt stop until he removed the battery. He indicated that its likely this would have been an electrical fire if the battery was not removed therefore could have caught on fire with myself and our 14 month old inside. There were no warnings, no alerts, no vehcile safety alerts, the mysubaru app in fact still says we have a 100% healthy vehicle.

The thermo-valve controller gives out on this vehicle. Through searches and discussions with two separate dealerships, this seems to be an incredibly common issue. It's enough that Subaru has actually completely replaced the design of this piece for whenever it gets replaced. This triggers a check engine light which already removes many features on the Subaru. My understanding is that this part controls and measures the engine temperature which means that drivers have no clue if their engine is overheating or not when it goes out. Subaru has gotten away with covering this part over their Powertrain warranty since the vast majority of their vehicles are having this part break within 3 years. Most drivers are happy with this because the major ($1500-2000) repair is covered. The issue is that people that drive more often, like myself, are stuck footing the bill for a part that Subaru has admitted doesn't work properly just because we've now fallen out of this 60k mileage warranty. From my research, it's not a part that is greatly affected by mileage, so much as time since the dealerships have noted that every replacement they've seen has fallen within 3 years, regardless of the mileage. For that, I'm asking that there be a true recall put in place for this part. This is a major expense for almost anyone and isn't fair for Subaru to hide behind a warranty that won't apply to everyone when they know they created this improperly. Even the reps at the dealership mentioned that they see this far too often for it not to be a recall, but that most people are still under 60k miles, so there aren't normally issues.

The thermo control valve on my 2020 Subaru Forester is broken and needs to be replaced. I have owned the car for 2 years, am the first owner, and it has less than 19,000 miles. 90 minutes into a drive the "coolant temp low" indicator light came on. After I pulled over, turned off the engine, and turned it back on the check engine light and sport mode indicator light came on, and all ADAS were disabled. The coolant level was low so I refilled it and took it to the manufacturer the next morning. They inspected my car and confirmed it the thermo control valve was broken. It is still broken as I cannot afford the repair and it is available for inspection upon request. My safety was put at risk by not having access to the ADAS forward collision warning, emergency breaking, and lane departure.

When I applied the brake ,the vehicle suddenly accelerated and smashed into my garage

The windshield cracked for no apparent reason. It’s a 2 foot long crack, low on driver side. The crack appeared while the car sat parked in a garage. It wasn’t there when the car was parked and was visible when we returned to drive the car. The windshield is so widely cracked, the risk is s sheet of glass will hurt the driver or passenger. We have not taken it to the dealer for repair yet The windshield cracked without warning or sufficient cause.

My windshield has cracked - huge lines running across the windshield including the driver's side - three times in 2.5 years necessitating I pay out of pocket to replace the windshield each time. I will now need to get my fourth windshield in less than 3 years of having a brand new car. Though I have been told that it was "outside influence" such as a rock, I did not see or hear a rock hit the windshield. Not to mention I have owned many other cars and have never had to replace the windshield so many times. The latest windshield I replaced was less than a month ago and now I have to replace it again. There was a recall/class action lawsuit on previous years of the Subaru Forester and it is not clear or apparent that they have changed the windshield substantially enough that this issue has been resolved. It is dangerous and defective to have a windshield that has long cracks in it so frequently and consistently. My and my family's safety is at risk when it is difficult to see because of the huge cracks in the windshield, particularly at night or in inclement weather (i.e., rain storms). The problem has happened now 3 times in less than 3 years. A product that warrants so much replacement is defective in nature. I have called both the dealership and Subaru USA - who said that they did know that I was not the only one having these issues. The vehicle has been expected by experts at Safelite and I am taking it to the dealership for an inspection with this latest crack. But because they claim a rock hit it then I have to pay for the replacement - but when this happens with such frequency then how can the windshield not be defective? When this is not the standard for all other cars! And it is dangerous to have an unreliable windshield! No there were no warning messages.

The vehicle was parked in our driveway in Lafayette, CA on 5/16/2023. Outside temperature reached approximately 75 degrees. The windshield developed a spontaneous crack, horizontally spanning the driver's side edge to nearly the middle. No impact point can be observed along the crack line. The vehicle is available for inspection but has not yet been inspected by any authority. Vision may be blurred or compromised along the crack line, which should be deemed a safety issue. Numerous reports of windshield faults for 2019+ Subaru Foresters have been reported online, though Subaru continues to deny these claims.

The contact owns a 2020 Subaru Forester. The contact stated that when the vehicle was parked in the garage, the contact became aware of a crack on the windshield. The contact stated that there was no impact to windshield to cause the crack. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 48,000.