2021 Subaru Ascent Other or unknown Problems
- Complaints
- 17about this part
- Share
- 16%of 104 total for the year
- Median mileage
- —not reported
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 17 complaints about the other or unknown of the 2021 Subaru Ascent, 16% of the 104 complaints for this model year.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I am a CPST. I use the Joie Mint Latch with my own child. On multiple occasions I have found on multiple occasions that when securing the lower rigid latch it will flip to green (secure) when it is not actually latched. It is during install when jiggling it into position. I am concerned parents who arent as well educated on car seats may not double check the latch before traveling and their child may not be safe.”
NHTSA complaint #11728594, filed 2026-04“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.”
NHTSA complaint #11665581, filed 2025-06“After my husband replaced the 12V battery in my 2021 Subaru Ascent Touring ($90,000, fully paid off), Apple CarPlay stopped connecting via USB entirely. Android Auto and Bluetooth continued working fine on the same phone, cable, and port, proving the defect was isolated to Subaru's CarPlay system, not my device. I spent significant time and money troubleshooting this myself: multiple cables (including two labeled Apple certified ), a full infotainment factory reset, and a software update attempt, none of which fixed it. …”
NHTSA complaint #11760953, filed 2026-08“After 3 years the battery died completely and the car was unable to start, I replaced the battery with AAA and the next the day, it also died again. I was able to jump start the battery the next day and continued to use the vehicle. I have the battery for about a month and again the battery on the vehicle had drained where I was unable to start the car but I was able to jump start the car with a battery jump starter. There has been 3 occasions of battery just draining and I have a new battery installed. …”
NHTSA complaint #11572800, filed 2024-02“The transmission on our 2021 Subaru Ascent is slipping and failing to accelerate, RPMs reving, and every issue indicator notification light is on. We took the car to our mechanic, then to the Subaru dealership service dept for diagnosis. A full transmission replacement is required plus associated repairs for a cost of $14,543.98. Service estimate attached. This repair is more than 2/3 of the value of the vehicle. This make/model and transmission type have documented problems and Subaru has previously issued an extended warranty on other model years for this same transmission issue. …”
NHTSA complaint #11710776, filed 2026-01Related service bulletins
- 11037943Oct 5, 2026This announcement provides information on a new software update for the Midtronics Dss and DCA machines.
- 11037940Sep 18, 2026This bulletin provides paint code information for 2027 model year vehicles.
- 11037930Sep 15, 2026This announcement provides an update to all 2027 model year Subaru warranty coverages for wear items and adjustments.
- 11037929Sep 14, 2026This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. This is an revised version of the…
- 11037928Sep 14, 2026In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen 3.1 Head Unit used in the listed…
- 11037925Sep 4, 2026This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be used when working with sunroof seals and sunroof frame assemblies on…
- 11037923Sep 4, 2026This announcement provides an update to the WRH-26 certification label recall.
- 11036817Aug 25, 2026Subaru of America, Inc. (Subaru) has initiated a non-compliance recall for certain 2026 model year Crosstrek Hybrid vehicles, 2025-2026 model year Forester & Forester Hybrid…
- 11035661Jul 28, 2026WRH-26 Certification Label Non-Compliance Recall- Parts and SSLP Process Updates.
- 11035646Jul 24, 2026This announcement provides WRH-26 recall information for owner contact and a vehicle disclosure form.
Other or unknown: other model years
Other parts of the 2021 Subaru Ascent
20 complaintsElectrical system
18 complaintsVisibility (wipers, defrost, mirrors)
18 complaintsLane departure
15 complaintsEngine
12 complaintsBrakes
9 complaintsForward collision avoidance
7 complaintsSteering
7 complaintsBody and structure
7 complaintsFuel system
2 complaintsTires
2 complaintsVehicle speed control
2 complaints
← All problems reported for the 2021 Subaru Ascent
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology