Adaptive Cruise Control problems of the 2021 Subaru Ascent

Three problems related to adaptive cruise control have been reported for the 2021 Subaru Ascent. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 Subaru Ascent based on all problems reported for the 2021 Ascent.

1 Adaptive Cruise Control problem

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.

2 Adaptive Cruise Control problem

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.

3 Adaptive Cruise Control problem

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).


Other Forward Collision Avoidance related problems of the 2021 Subaru Ascent

Adaptive Cruise Control problems
3
Warnings problems
1


Safety Ratings of Ascent Cars
Fuel Economy of Ascent Vehicles
Ascent Service Bulletins