Adaptive Cruise Control Problems of Subaru Ascent

Subaru Ascent owners have reported 14 problems related to adaptive cruise control (under the forward collision avoidance category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Subaru Ascent based on all problems reported for the Ascent.

1 Adaptive Cruise Control problem of the 2024 Subaru Ascent

Failure Date: 12/03/2025

Uncommanded maximum braking with simultaneous high-voltage and low-voltage shutdown. Vehicle is not safe in florida with puddles or any types of ongoing obstructions vehicle shuts down in the middle of traffic if it perceives you do not match google maps.

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2 Adaptive Cruise Control problem of the 2024 Subaru Ascent

Failure Date: 05/16/2024

Eye sight freezing when car purchased brand new. I was told that this was a known issue. Radio freezing and then resuming at blaring volume, I was told that this was a known issue and Subaru was waiting for an update. Burning smell from car when purchased, notified dealer, smell did not go away. I was told that this was normal. Starling freezing and not working, this was a service that I paid for, I was told that this was a known issue and was waiting for an update. On 6/9/2024 I was driving, while entering a tunnel, and using the adaptive cruise, the car did not track the car in front of me. I braked, this did not stop the adaptive cruise (according to Subaru) and the car collided with the car in front of me after the emergency braking system failed to also stop the car in time. Starling did not call to check on us for 30 minutes (did alert 911) but no call was made to my phone, as per the paid service, and the airbag exploded and we were covered in brown substance. I had asked to return the vehicle before any of these events, as I felt that there was an issue with it, as was told to begin the north carolina lemon law process.

3 Adaptive Cruise Control problem of the 2020 Subaru Ascent

Failure Date: 11/11/2023

Cvt jerks the vehicle and stutters when at certain rpms, making long car rides very uncomfortable. Feels like whiplash every so often. Very dangerous when trying to speed up to pass another vehicle because the vehicle doesn't respond and accelerate as it should. The dealer said its normal because of the cvt technology. They said they tried to reproduce it, but were only gone 5 minutes. The highway is 5 minutes away from dealership, one-way. I explained it happens after about 20 minutes of continously driving at speeds over 50 mph. The vehicle had only been inspected once for this issue. The dealer refuses to look at it again because they, "already explained it to [me]". There are no warnings or indicators prior to it happening.

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4 Adaptive Cruise Control problem of the 2020 Subaru Ascent

Failure Date: 06/06/2023

Since the day I bought this car anything that blows across the road causes the brakes to slam on. . . . Even at speed on the highway this is dangerous as hell. Additionally the eye sight disconnects intermittently for on reason or because of rain or a small bump in the road. You must stop and turn the car off and on to get a reset. I have had the vehicle inspected at 3 different Subaru dealerships and they all say nothing is wrong with either system. Now I have tried for 2 weeks to get a response from Subaru customer advocate with negative results.

5 Adaptive Cruise Control problem of the 2021 Subaru Ascent

Failure Date: 11/30/2022

Adaptive cruise control, automatic emergency braking, forward collision warning, lane departure warning, lane keeping assistance, eye sight, rab, some ! symbol, and check engine light are all on and not working. You know everything that makes a Subaru. This is not the first or even second time. We are on the fourth instance of this happening. We live 2+ hrs away from the closest dealers. The first few times it occurred, we called to make a appointment. Each time was always a few weeks out and the issue would clear a day or two before. This last time has been going on for 6 weeks. We both work full time and have a very sick kid so making a appointment is hard. This last time I asked if I can drop in just for a scan due to being in town for an appointment. Was met with we are backed up with way to many repairs. Also it would not be fair to any other people. It is most likely your gas cap. I have made sure the cap is tight as it can get every time from the first time it occurred. So all safety features on the Subaru Ascent just stop working if the cap is not tight. Not only is this a major safety issue their qa is asleep at the wheel. Known issue, just check the forums.

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6 Adaptive Cruise Control problem of the 2019 Subaru Ascent

Failure Date: 11/20/2021

Left tailgate open for ~5 hours and the parasitic draw of that action left our battery dead. We were stranded in the middle of nowhere and had to get the battery jumped. After getting jumped. . . Our electronics, especially the safety systems were no longer operable.

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7 Adaptive Cruise Control problem of the 2019 Subaru Ascent

Failure Date: 10/11/2021

The backing camera won’t come on when I’m baking and if there is cars it won’t beep, the apps on the screen won’t display and console screen is not operational at all not even for the radio.

8 Adaptive Cruise Control problem of the 2020 Subaru Ascent

Failure Date: 07/13/2021

When applying brakes to 2020 Subaru Ascent limited (10,325 miles) the car shudders. Being an aircraft mechanic for over 45 years I knew the brake rotors were warped. I took car to Subaru of kennesaw GA. 7-13-2021. They opened work order sucs159697. They resurfaced the rotors on front brakes and installed new pads. My safety concern is if brake rotor originally installed are warping and now you are removing the width of the rotor making it thinner and more likely to heat and warp sooner. When I questioned the maintenance technican about this concern he stated this was Subaru policy to resurface. Extreme heat to brakes could cause brake failure.

9 Adaptive Cruise Control problem of the 2021 Subaru Ascent

Failure Date: 05/13/2021

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.

10 Adaptive Cruise Control problem of the 2021 Subaru Ascent

Failure Date: 03/16/2021

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).

11 Adaptive Cruise Control problem of the 2020 Subaru Ascent

Failure Date: 06/23/2020

Right front camera is blocked by plastic since manufacture. The adaptive cruise control and forward emergency braking do not work reliably unless the object is the left visual field. My car will accelerate into a car in front with no emergency braking. No accident. So far, because I have been able to avoid accidents by braking myself. The problem was diagnosed by diablo Subaru of walnut creek. The vehicle was inspected and diagnosed by a Subaru dealership. The car tells me it cannot see the car in front. It also says it cannot see anything on haphazard basis. But it will also accelerate toward cars in front of it at close range because it cannot see.

12 Adaptive Cruise Control problem of the 2019 Subaru Ascent

Failure Date: 02/26/2020

Purchased a new 2019 Subaru Ascent in February 2019. After having it home a few days noticed a chip with a small crack in the windshield on the bottom drivers side corner near the blacked out area, which I did not see when I took the car. Called the dealership and brought the car in to show them. They said there was nothing they could do and I would have to pay for a new windshield. A month later I wrote a letter to the owner of the dealership and never received a response or acknowledgment of my letter. A year later the small crack turned into a very large crack and ultimately I had to replace the windshield in March, 2020, and pay the deductible on my insurance policy.

13 Adaptive Cruise Control problem of the 2020 Subaru Ascent

Failure Date: 12/30/2019

A chip in the windshield cracked and spidered down the whole windshield. It happened 2 weeks after owning my new car. I'm still unsure on why it cracked 🤦‍♀️ there isn't a chip mark or any start point. It's worried how it just started cracking. And since it's over a 1,000 to fix it. It is still cracked. And anything that requires the eye no longer works. I love my car but hate how nothing needing the eye works.

14 Adaptive Cruise Control problem of the 2019 Subaru Ascent

Failure Date: 12/04/2019

Windshield cracked within a few days of driving it off the lot. I was just driving it and I noticed a small crack. . . And then within a few days the crack went the entire length of the windshield.


Other Common Forward Collision Avoidance related problems of Subaru Ascent

Problem Category Number of Problems
Automatic Emergency Braking problems
14
Adaptive Cruise Control problems
14
Warnings problems
6
Forward Collision Avoidance problems
4

Ascent Service Bulletins