2020 Subaru Forester
Problems, recalls and owner-reported issues
Visibility/wiper is the leading concern among 600 owner complaints filed for this model year. This is the 3rd highest complaint count among 26 Forester model years with reports.
Of the 2020 reports, 26 involved a crash and 9 involved a fire. 16 people were injured.
What owners report most often
Recalls and investigations
No safety recalls on file.
Representative owner complaints
600 reports, newest first.
Power train, Oct 6, 2023
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.
Vehicle speed control, Fuel/propulsion system, Sep 26, 2023, crash
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.
Visibility/wiper, Sep 25, 2023
I have had three cracked windshields within 4 years of driving and 30,000 miles
Visibility/wiper, Sep 20, 2023
Windshield on this Subaru Forester cracked severely shortly after purchasing the car. This happened in the driveway while parked. Nothing hit the glass.
Visibility/wiper, Sep 20, 2023
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
Other or unspecified, Sep 20, 2023
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.
Engine, Forward collision avoidance, Lane departure, Sep 19, 2023
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.
Electrical system, Engine, Sep 14, 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.
Electrical system, Engine, Lane departure, Sep 11, 2023
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.
Electrical system, Other or unspecified, Sep 11, 2023
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.
Forward collision avoidance, Lane departure, Sep 9, 2023
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.
Visibility/wiper, Sep 6, 2023
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.
Visibility, Sep 5, 2023
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.
Power train, Aug 30, 2023
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.
Other or unspecified, Aug 8, 2023
Windshield cracked for no apparent reason.
Visibility/wiper, Aug 6, 2023
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.
Power train, Lane departure, Forward collision avoidance, Jul 31, 2023
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
Visibility/wiper, Jul 26, 2023
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.
Engine, Jul 22, 2023
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.
Visibility, Jul 18, 2023
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.
Lane departure, Forward collision avoidance, Jul 17, 2023
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.
Engine and engine cooling, Engine, Jul 14, 2023
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.
Power train, Forward collision avoidance, Jul 12, 2023
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.
Power train, Vehicle speed control, Fuel/propulsion system, Jul 8, 2023
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).
Chest clip, Buckle, Harness, Jul 2, 2023
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.