2021 Subaru Outback engine problems

ENGINE

Good Day! I bought my 2021 Subaru Outback XT Onyx in Jan 2021. I had waiting 6 yrs for Subaru to use the Turbo Motor in the Outback again. I've had this car for 5 years with my warranty running out Jan 2026, but I only drive 5000-7000 miles per/yr. Current odometer is 29,901 miles. At my most recent oil change service at the Dealer, they showed me a video of my cars drivetrain from underneath. There were two bad seal leaks. One at the transmission pump housing and the other at the Upper Oil Pan. I had been there for an oil change a year earlier for the same service and there was no mention of these issues! After speaking with the service advisor, he said to call Subaru Customer Advocates. They listened to my situation and a few days later offered a $1400 credit for a $4000 job that involves the removal of my cars engine (upper oil pan) to replace it because it's bolted to the frame there. The other leak seal involves dropping the transmission. These are major repairs that following will dampen my ownership experience after decades of Subaru praise by Americans. I researched this issue online and found out there was a manufacturing defective regarding the silicone liquid seals they used for 2020-2022 Outback, Ascent, & WRX! This procedure was used throughout the driveline with the Turbo Motor & CTV Trans. There are 1000s of accounts of this defect placing burden on the owners of these cars who bought them in good faith. I did the research, called the dealer & Subaru with the discovery & overall complaint! I asked for 80% to 100% help with these repairs because how many more will I have to deal with after these two are repaired??? I have received zero responses from either after expressing that this was a known defect, Bullitens went to all the dealers, nothing was mentioned to the owners, and they've just covered those cars still under warranty. Since I didn't drive enough, the seal issues on my car took longer to start leaking, and then out of warranty. HELP!

NHTSA complaint #11758285 — an unverified report by a vehicle owner.

ENGINE

Thermo Control Valve Failure- Contact Subaru of Cherry Hill, NJ for Inspection 177,4XX Miles P26A5 code Check engine Light on, Disabled Safety Systems (Eyesight System), Car may have overheated if not pulled over and turned off. Part of warranty extension but did not qualify due to mileage.

NHTSA complaint #11736441 — an unverified report by a vehicle owner.

ENGINE

The failure involves the engine (powertrain), which was under warranty. The vehicle has experienced four catastrophic engine failures resulting in sudden loss of power, including at highway speeds (65–75 mph). The most recent failure also involved an oil-saturated catalytic converter. These failures occurred between 06/25/2024 and 03/16/2026. During this ~629-day period, the vehicle was only in my possession for about 184 days, as it remained at the dealership for diagnosis, repairs, and repeated engine replacements. The issue remains unresolved. The vehicle is currently in my possession, available for inspection, and is not being driven due to safety concerns. All failures occurred during normal driving and caused sudden loss of power with no prior warning, leaving the vehicle inoperable and stranded. This created a significant safety risk due to inability to maintain speed or safely merge, increasing the likelihood of rear-end collisions. The failures have been confirmed by an authorized Subaru dealership, with multiple engine replacements performed under warranty and most recently as a goodwill repair. Both the dealership and Subaru of America have acknowledged they cannot determine the root cause. The dealership’s Operations Director stated the vehicle is not safe and he would not allow his family to drive it. The vehicle has been inspected multiple times by the dealership and Subaru of America. However, no inspection reports, diagnostic data, or detailed findings have been provided despite repeated requests. Additional issues (including a broken axle and oil-saturated catalytic converter) were only identified during a third inspection after being missed previously. Requests for explanation were not answered, and further details were withheld as “internal.” There were no warning indicators prior to the first three failures. During the fourth, a temperature warning appeared only seconds before failure.

NHTSA complaint #11727143 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

The contact owns a 2021 Subaru Outback. The contact stated that while driving approximately 55 MPH, the vehicle stalled. During the failure the "Eyesight" message was displayed, and the check engine warning light was illuminated. The vehicle was later towed to the local dealer who diagnosed that the thermal control valve had failed and needed to be replaced. The thermal control valve was replaced, and the vehicle was repaired. The manufacturer was notified of the failure informed of the extended warranty coverage related to the failure. The failure mileage was 18,640.

NHTSA complaint #11675847 — an unverified report by a vehicle owner.

ENGINE

Thermo Control Valve. Check engine light on. Eyesight Adaptive Cruise Control Automatic Emergency Braking Blind Spot Warning Forward Collision Warning Lane Departure Warning Lane Keeping Assistance X mode Dealership would not honor repair even though there is recall it does not cover vin 63400 miles Vehicle inspected by manufacturer code P2682 Check engine light is on and eyesight warning

NHTSA complaint #11652303 — an unverified report by a vehicle owner.

ENGINE

The speed control (adaptive) doesn't work. The interior heater doesn't work. Several lights including the 'check engine' light come on the dash. The lane departure system doesn't work. (It appears the thermo control value subassembly may be at fault.) The car has approximately 25K miles on it.

NHTSA complaint #11630726 — an unverified report by a vehicle owner.

ENGINE

The contact owns a 2021 Subaru Outback. The contact stated while driving approximately 40 MPH, the check engine, ABS, and brake warning lights illuminated. The contact pulled over to the side of the road. The contact turned off the vehicle and waited for several minutes before restarting the vehicle; however, upon restart the transmission failed to shift into the desired gear. The vehicle was towed to a local dealer to be diagnosed. The contact was informed that the vehicle was not covered under warranty due to a third-party damage to the rear brake cable. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 24,000.

NHTSA complaint #11623437 — an unverified report by a vehicle owner.

ENGINE

Thermo control valve failure. Would not cover it

NHTSA complaint #11620185 — an unverified report by a vehicle owner.

ENGINE

The auto restart does not work and requires a car restart to fix. The latest software update caused this is to happen.

NHTSA complaint #11614261 — an unverified report by a vehicle owner.

ENGINE

Today while waiting at a stop light the auto start stop engaged. When the light went green I put my foot on the gas and the vehicle stalled. The car was on but not running, several alarms were on the dashboard. I had to put the car in park, turn it off and then restart the car. This is a repeated issue and has been going on at least once a month since we purchased the car in 2021. We've brought it to the dealer and they said there was nothing wrong because there was no OBD code. I have checked myself and I have not found any code. This is extremely unsafe

NHTSA complaint #11608885 — an unverified report by a vehicle owner.

ENGINE

failure/malfunction of thermo coolant control valve some of the systems safety features have been disabled making it unsafe for me to drive vehicle The car gets hot and high beams don’t work heater doesn’t work. Diagnostic was performed by independent mechanic determining this issue Warning lights on dashboard to check engine and many other lights flashed Repairs cost over $1700 which is not affordable especially since this a manufacturer defective part.

NHTSA complaint #11576782 — an unverified report by a vehicle owner.

ENGINE

While doing a casual drive, engine made a noise after work at night. Woke up in the morning and check engine light as well as the EyeSight light was on. Checked everything and noticed the coolant was low; but upon filling it, did not resolve the issue. Took it to a Subaru service center and was told that it the Temp Valve had been stuck and that they had replace not only one for my year model the same day, but also a ‘20 and ‘19 in the past week. Have looked online and noticed others have been unfortunate around the same mile range 60k.

NHTSA complaint #11573060 — an unverified report by a vehicle owner.

ENGINE

Received error code P2682, a faulty Thermo Control Valve. This happened on 11/17/2023. Car potentially could have quit running in traffic. Subaru has identified the issue with TSB 09-80-21R. They have changed the design of the valve due to the many failures. My car has 74,000 miles. My brother in law has the same vehicle with 57,000, and his car is in the shop today for the same issue. The service tech working on his vehicle stated that he does a couple of these repairs a week, and that Subaru knows this part will fail and should issue a recall

NHTSA complaint #11556403 — an unverified report by a vehicle owner.

ENGINE

I was driving and suddenly 13 flashing lights and codes from check engine to loss of cruise control and RAB -dealer says it needs a new thermo control valve (thermostat). This failed part has been common on Subarus for 3 years-reported on internet and even to the point where a guy sitting next to me today with same car and year and same $1800 bill and diagnosis. Should be a recall. Part was redesigned in 2022 I read.

NHTSA complaint #11543033 — an unverified report by a vehicle owner.

ENGINE

Traveling toll road /fwy at approx 70mph at rush hour and lost all power with Check engine light , emergency brake, lurching engine, all flashing at the same time!!! Coasted through 4 fwy lanes to offramp and service station- extreme danger!!! How was there no pile up with me going from 70-10 to coasting on a busy 15 Northbound fwy at 7:30 am?????? Was in toll lane and crossed toll 3 foot sticks to exit at first available exit. 2 cars followed me off as they were concerned for my safety Towed to shop where they put in new thermo valve, gasket intake manifold, Pipe ay- fuel and gasket egr pipe 56000miles, 2 year old car 3 replaced windshields in last 6 months They said they've done 10 cars with this problem in the last year???? Insurance covered windshields , service center at Subaru inspected car

NHTSA complaint #11507046 — an unverified report by a vehicle owner.

ENGINE

My 2021 Subaru Outback vehicle is subject to a recall for engine harness and ECM replacement, according to Subaru. I took my car in twice to the dealership and it was unable to perform the recall repair. That dealership told me that the issue presents no safety problem - is that true? (The current recall of 2022s sound like there is a safety issue.) Your website says my repair was performed. That is false. Can you help me understand why you show the vehicle has been repaired? Can you help me find a dealership that knows how to safely repair the car?

NHTSA complaint #11479785 — an unverified report by a vehicle owner.

ENGINE

The contact owns a 2021 Subaru Outback. The contact stated while at a traffic light, the vehicle stalled. The instrument panel lights illuminated then went dark. The police came but there was no police report filed. The police had the vehicle towed to a dealer. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 12,500.

NHTSA complaint #11467029 — an unverified report by a vehicle owner.

ENGINE

I walked outside my house yesterday morning to find my 2021 Outback XT idling in the driveway. I may have failed to turn the engine off, or it may have started itself. Nonetheless, I calculate that it burned about five gallons of gasoline and probably ran all night. The car should not be able to run for hours on end! This is a clear problem--an overheated catalytic converter could start a fire, someone could have jumped in and driven away, or--much worse--it could have been running in an enclosed area and filled it with CO.. This car does have remote starting capability, so I wonder if that somehow played a role. It also has the start-stop function to save gas. I have noticed that if I stop the car and hit the start/stop button right away, it sometimes seems to stop but then runs on. I strongly believe that the car should not be able to run on like this. Couldn't Subaru build in a a timer to turn the engine off after, say, one hour? These are not police cars and do not need to be able to idle for hours on end. Thanks very much for your kind consideration!

NHTSA complaint #11457634 — an unverified report by a vehicle owner.

ENGINE

Bought this new Subaru in December and the battery died twice after a week and a half of not driving. The first time I had to get the battery replaced. If I don't start the car every few days (and during COVID I don't) then the electricity completely drains the battery dead.

NHTSA complaint #11433407 — an unverified report by a vehicle owner.

ENGINE

The Auto-start feature, which stops the engine at a light, then restarts, is very dangerous. It cannot be permanently turned off - always on by default. 1 if the steering wheel is not perfectly straight, it jerks out of your hand when the engine restarts. 2 the car jerks forward when the engine restarts. This has already put me in danger of a crash several times - and this 'feature' must be actively disengaged each and every time the car is started. It should be able to be permanently turned off - not always on by default.

NHTSA complaint #11432757 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

The contact owns a 2021 Subaru Outback. The contact stated while coming out of a full stop, the vehicle would stall without warning. The contact stated no warning light was illuminated. The vehicle was taken to a local dealer but was not diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 6,500.

NHTSA complaint #11431370 — an unverified report by a vehicle owner.