Assist Problems of Subaru Ascent

I was driving and I got check engine light and all safety features disabled while I was in the freeway, luckily I was able to drive to nearby Subaru dealer for inspection and I found out that there was a recall on the engine for this vehicle and when I contacted the manufacturer they asked me to take it for diagnostics and I did that at a Subaru retailer, but the case manager told me that this recall is being completed for the previous owner of the vehicle and cannot help me with anything, which was never disclosed when I was buying the vehicle.

See all problems of the 2020 Subaru Ascent 🔎.

Incident description – event 1 on August 28, 2025, at approximately 4:45 p. M. While driving on sugar ridge road, my 2023 Subaru Ascent suddenly jerked violently into the left lane without warning while the eyesight driver assist system was active. I had to take immediate corrective action to maintain control and avoid a head-on collision. This behavior has occurred on multiple occasions under similar circumstances. My husband has also experienced the same issue while driving, which demonstrates this is not an isolated event. Incident description – event 2 on multiple other occasions, while the eyesight driver assist system was engaged, the vehicle veered dangerously close to a semi-truck traveling beside us. I had to react instantly to prevent sideswiping the truck, which could have resulted in a severe accident. We have noticed this behavior occurs nearly every time we are alongside a semi-truck on the highway.

See all problems of the 2023 Subaru Ascent 🔎.

The lane assist failed by over correcting while I have my hands on the steering wheel. It over corrects to the center lane when you are driving with normal behavior. This can cause a collision if it were to over correct while a car was there, this is also easily reproducible in my car.

See all problems of the 2021 Subaru Ascent 🔎.

Vehicle drifts on the highway and pulls hard to the left, which is a very concerning safety issue. I have already taken the vehicle to the dealer; they did a calibration of the eyesight. The problem still persists, especially when driving the vehicle on the highway. This has almost pulled me into traffic on a few occasions!.

When driving and lane lines change width the car tried to street across them at highway speeds. Happens regularly.

See all problems of the 2022 Subaru Ascent 🔎.

Vehicle wanders on the highway and pulls hard to the left, which is a very concerning safety issue. I have already taken the vehicle to the dealer, did an alignment and took it back a month later because the issue persisted. The problem persist, specially when driving the vehicle on the highway. I am really concern about my family safety and the safety of others in the road.

It is actually the lane centering system. Even a gentle hand on the wheel, which is required, will gradually pull you to one side of the lane. When ever you lift your hand or when the car thinks you have gone to far one way or the other it will throw you into the other lane, into a car, motorcycle, semi, or even off a cliff. This system is so dangerous I cant believe it hasnt been recalled. If using this you will get thrown one way or the other several times during most trips. Dealer states its normal and I got that in writing.

The car constantly over-corrects when it tries to keep me centered in a lane on the highway. It always over-corrects to the left shoving me to the left into the adjoining lane, and potentially side swiping vehicles in the adjoining lane. It never over-corrects to the right. I reported this to the dealer and I was told that this is normal.

The lane keeping assist pull abruptly into the other traffic lane when traveling on the highway for example when on a 4 lane road with two lane in the same direcstion and passing a semi truck the steering assist abruptly pulls the car into the truck's lane and requires immediate hard handed reaction to keep the car from hitting the truck. The lane assist on this Subaru vehicle is more dangerous than it is helpful. Subaru is terribly un response to request for help although the car is less than 1-year old and has a mult-year extended warranty---Subaru's customer service is the worst we've experienced. Btw my son's Honda Acura's lane assist is excellent!.

On several occasions while using the lane centering feature, vehicle has taken a sudden violent move to the left into the on coming lane. No warning lights illuminated. Problem hasn’t been replicated by dealer.

Lane assist with cruise control over corrects. On multiple occasions while on the freeway using cruise control the lane assist pulled me into the other lane into other vehicles. I have almost hit other vehicles. The pull is too strong and crosses lanes. If not fixed by Subaru, accidents will occur.

Lane assist with cruise control over corrects. On multiple occasions while on the freeway using cruise control the lane assist pulled me into the other lane into other vehicles. I have almost hit two other vehicles. The pull is too strong and crosses lanes. I have to keep it off. Forward collision does not engage.

The lane assist feature (only an option when using adaptive cruise control; not the same as lane centering when not using the adaptive cruise control [the basics lane centering works just fine]) seems overly aggressive. Each time I have used lane assist with cruise control, it jerks the car very abruptly at times, almost to the extent of sending it into another lane if I do not intervene. I no longer feel safe using lane assist, so I turn it off when using cruise control. I am very concerned it's going to cause and accident. This has happened at least 5 times now while driving on the freeway (every time I have attempted to use lane assist).

The 2021 Ascent has lane centering assist with very strict margins. It is a constant tug of war with the vehicle when lane centering is active. When you let the car take over, it violently jerks you into the next lane. This problem has been cross checked with other users on a Subaru forum and all have the same issue. The car overcorrects and is prone to cause an accident at some point. I am lucky no one was in the lane next to me when the car swerved me into the next lane. My 2021 is a replacement of a 2020 model because the 2020 was deemed a lemon. The 2020 model did not have lane centering but lane keep assist instead. The 2020 did not violently jerk into the next lane. This issue has been reported to leslie karpiak at soa who helped me through my lemon issue on the 2020 model. I requested a full buy back and she suggested I have my car inspected at a dealership, but that is a lengthy process and I have already spend 3 months in and out of dealerships with my 2020 model. This appears to be a common issue on all 2021 models and should be investigated fully. I am holding Subaru 100% liable when an accident occurs because of this lane centering issue. This issue happens on a continuous driving basis. Your help and assistance is greatly appreciated for the sake of saving lives.

My vehicle is fairly new 7 months to be exact. When it was 4 months old I've started to notice rust and corrosion on the window panels that are metal. When I went in for oil change service they deny that there is rust and just offered to polish it. At 7 months the windshield has chips and cracks which is odd without a reason.

I have had my lane assist come on by its self a few times, which is very dangerous because it seems to take over and will pull on the steering wheel. I’ve also brought my car back to the dealership a handful of times to have it hooked up to a computer and also someone ride with me because the car will either hesitate to accelerate or stutters and doesn’t seem to want to go when I am between 20-30 miles an hour. Other times when I’m at a light or stop sign it hesitates also. I was told there was nothing wrong with it and they reprogrammed to transmission but it didn’t help at all.