Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2019 Subaru Ascent owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2019 Subaru Ascent. The contact stated that while his wife was driving at approximately 75 MPH, a deer ran across the highway and hit the left driver's side of the vehicle. The air bags did not deploy upon impact. A grayish smoke began to emit from the vehicle as the contact's wife immediately pulled off to the side of the road. Due to the damaged cause by the impact of the deer, the contact's wife had difficulty exiting the vehicle. The contact's wife used excessive force to open a crack in the door, which was enough to slide herself out of the vehicle. The vehicle became engulfed in flames soon after exiting the vehicle, and the authorities were called to the scene. The fire department arrived at the scene and managed to extinguish the fire. The contact's wife sustained bruising to her left shoulder, left leg, and left arm but did not seek medical attention. …
The contact owns a 2019 Subaru Ascent. The contact stated that after starting the vehicle and shifting from PARK to DRIVE, the RPM abruptly went up from 1,200 to 4,000. The contact shifted the vehicle into NEUTRAL to check if the accelerator pedal was stuck but found no obstruction to the pedal. The contact restarted the vehicle and slowly drove the vehicle to his residence. The contact stated that the failure persisted. The contact called a local dealer but was unable to schedule a date to have the vehicle diagnosed. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 47,915.
The contact owns a 2019 Subaru Ascent. The contact stated that while the engine was idling, exhaust fumes entered the cabin of the vehicle. Additionally, immediately after starting the vehicle, there was a loud ticking sound coming from the exhaust system. The vehicle was inspected by the local dealer, and it was determined that the exhaust manifold lines were faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was 120,000.
Over the course of 5 years, a lot has been mechanically wrong with our vehicle. Each service appointment yielded a 'cannot duplicate' response. Recently, my car has been in the service department a few times. My car had recall work performed on a ground bolt, and my husband advised them that the car had a 'rich fuel' smell when starting with the hood open. I've complained since 2021 of a smell when pulling up the mountain. The smell is what I described as a perm solution smell. Each time, the response was 'cannot duplicate.' In February, I took the car in to have the exhaust inspected because it was getting louder each passing day. I was advised that the entire exhaust needed to be replaced, and I would be responsible for costs. I brought my car home, unrepaired, and called Subaru of America to file a claim through them. …
Vehicle has experienced total loss of power while driving under normal circumstances. This has occurred in a drive-thru, at 45 and 50mph, and also twice during 70mph highway driving. The entire vehicle shuts down and multiple dash board lights illuminate at the time of power loss. I first documented this on 4/7/22 and it randomly occurs every month, once it even happened twice in the same day. I had called the dealership (where I purchased the vehicle and have it serviced) multiple times throughout the spring and summer awaiting parts for the TCM recall with the assumption that this could be the issue. However , my vehicle passed the recall and even after the new TCM was placed on 8/19, I again had the same event on 10/1. Vehicle was taken in on 10/6 for diagnostics on this issue again and nothing found. …
Purchase the car two weeks ago the first night on the way home it was acting up just like it did when I test drove it and was told by the BMW dealership Aristocrat Motors in Topeka Kansas that they would fix anything that was wrong with it. On the way home I realized I didn't think it would make it back the 60 miles so I took it to Olathe Subaru they informed me that it had had transmission problems reported by the previous owners but their technician couldn't get it to do it again so the people just traded it in instead and then I got the car without them getting the transmission fixed or whatever was wrong. They are actually waiting on Subaru of America to respond to tell them what needs to be done to the car and in the process I have been two weeks with little information of what's going on. …
Trying to pass an 18-wheeler on PA Turnpike. Weather 68-degrees, sunny day, no precipitation. When accelerating, the vehicle began shaking. There was a stutter in engine, shaking the vehicle. Suddenly a loud bang jolted the car and the Crash avoidance system applied breaks (I was the left passing lane, at a speed of 70 mph, with more than a dozen vehicles close behind). Emergency collision warning, EyeSight warning, check engine, RAB, and numerous dash error alterts illuminated. The parking brake turned on and off without human intervention (it's computer-controlled). The engine shut off and a multiple car fishtail began behind me. Fortunately, no one was hurt. I put the car in Neutral, lurched to the side of the road, and called OnStar. Calls to the dealer have not been returned. I drive elementary children to scouts and sporting events. …
As I am going up a hill I will be pushing on the gas and the engine will rev up loudly and the rpm will increase but the vehicle speed won't increase or it decreases as I'm trying to accelerate. This is dangerous because the people behind me are expecting me to be speeding up to go up the hill but my vehicle will be slowing down and won't let me increase speed. It has been to the dealer multiple times and they say they can't find nothing wrong. We drove the mechanic around and it did the exact same thing I explained and he still said they couldn't find anything wrong with it. I know this isn't normal because when we first bought it, it did not drive like this. I've also had multiple people tell me they are experiencing the same exact issues. This has been going on for about a year now. It also has been doing a few other things as well.
Unknown. Electrical failures including eyesight, the dealers lie about the work they do, the latest was recent - they said sludge was everywhere which causes the timing to be off and said the entire engine needed to be replaced but refused to do so. I do not trust they were honest about the spot welds, as my VIN and contract were mysteriously changed after I took delivery. Battery dies, amp dies, head unit stops functioning for months at a time. Eyesight slams on brakes at last minute. I am told it's normal to shut up and leave. For example the last time I took it in less than 30 days ago they said they changed the filters as well. They did not. According to them they owe me a new engine. I have Starlink and documents oil is changed by Subaru yet they claimed they had no record, and it is my fault so I need to replace engine.
The Y pipe that connects the exhaust from the engine to the turbo charger, has cracks from poor welds. It happened 8-12 months ago we started to notice that during warm up our Ascent would sound real loud then quiet down once it warmed up. We didn't know there was an issue as there were no lights that came on and we had no loss of power or MPG. The safety issue would be that we finally took the car in once we started to smell exhaust fumes coming from the car that we would start to smell from inside the car. We had to start to air out the car after warming up if we couldn't immediately drive away once started. We contacted Subaru and they offered a partial credit for a repair but after researching I have seen they have had recalls in the past regarding similar cracked Exhaust manifolds on another model car.
Related recalls
Engine and engine cooling › Exhaust system › Emission control › Crankcase (pcv)
Subaru of America, Inc. (Subaru) is recalling certain 2019 Crosstrek, Forester, and Ascent vehicles. The aluminum Positive Crankcase Ventilation (PCV) valve can separate, allowing the separated components to enter the engine, resulting in a loss of power while driving.
Remedy: Subaru will notify owners, and dealers will inspect and replace the PCV valve, free of charge. If the PCV valve has separated and the components cannot be found, the short block engine will be replaced, free of charge.
Engine complaints in other Ascent years
Frequently asked questions
How common are engine problems on the 2019 Subaru Ascent?
NHTSA has 48 complaints about the engine & cooling of the 2019 Subaru Ascent, 11% of the model year's 443 complaints. The component named most often is exhaust system (1 mentions).
Is there a recall for 2019 Subaru Ascent engine problems?
Yes — NHTSA recall 19V-856 (crankcase (pcv), Dec 2, 2019). Recall repairs are free at authorized dealers.
At what mileage do 2019 Subaru Ascent engine problems start?
Half of the complaints with a recorded mileage happened before about 10,000 miles, and 87% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 2 fires and 1 injury to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.