Power Train Related Problems of the 2021 Subaru Ascent

Table 1 shows two common power train related problems of the 2021 Subaru Ascent. The number one most common problem is related to the power train (eleven problems). The second most common problem is related to the automatic transmission (one problem).

Table 1. Power Train related problems of Subaru Ascent

Problem Category Number of Problems
Power Train problems
11
Automatic Transmission problems
1

Recently reported Power Train problems of the 2021 Subaru Ascent

The Power Train problem

On Friday, June 13, 2025, while (thankfully) in my driveway, the transmission broke on my 2021 Subaru Ascent in my driveway. I simply started my car, put it in reverse, and my car jerked and stopped. No prior warning. I was on a slight slope.   Read details...

The Automatic Transmission problem

The contact owns a 2021 Subaru Ascent. The contact stated while driving 65 mph and attempting to accelerate, the vehicle inadvertently lost motive and failed to accelerate at intended. The vehicle returned to normal functionality, but the failure became a regular occurrence.   Read details...


Power Train related problems in other Subaru Ascent model year vehicles:



Ascent Service Bulletins