2021 Subaru Ascent engine problems
12 owner complaints filed with NHTSA name the engine on the 2021 Subaru Ascent — 12% of all complaints for this model year.
What owners report
“My 2021 Subaru Ascent (40,000 miles) suffered multiple major mechanical failures that pose ongoing safety concerns: 1. Engine Oil Leak: The vehicle developed an active engine oil leak at 20,000 miles, posing a risk of fluid contacting hot exhaust/engine components under the hood or causing low oil…”
filed Jul 29, 2026
“Oil leaking from upper and lower oil pan. Oil seeping from head gasket and CVT chain pump cover. RTV sealant failure. $4800 to repair. Subaru needs to solve these oil leak issues. Leaking oil is bad for the environment and engine failure could cause accidents and injury.”
filed Jul 11, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and…
02-193-24R · Service Bulletin/Repair Instructions · issued Jun 30, 2026
Engine problems in other Ascent years
| Year | Reports | Share |
|---|---|---|
| 2024 Ascent | 2 | 4% |
| 2023 Ascent | 3 | 7% |
| 2022 Ascent | 9 | 16% |
| 2020 Ascent | 29 | 9% |
| 2019 Ascent | 47 | 11% |
Other reported problem areas on the 2021 Subaru Ascent
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.