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2020 Subaru Ascent Engine Problems

10 owner-reported engine complaints from NHTSA data

10
Complaints
1
Crashes
Feb 2026Nov 2025
Date Range

Data sourced from NHTSA public database. For informational purposes only. Always consult a qualified mechanic.

Owner Complaints (10)

criticalENGINE
Filed: Jul 2025

Unknown PCV valve failure caused catastrophic engine failure on interstate highway (70 MPH speed limit). Luckily there was room to pull to the side and no one got hurt. This part was recalled in 2019 models due to possible loss of control from engine failure.

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NHTSA #: 11676042
criticalENGINE,FUEL/PROPULSION SYSTEM,FORWARD COLLISION AVOIDANCE
CrashFiled: Feb 2024

On Friday evening, February 23, 2024 , I pulled onto my driveway and came to a complete stop before driving into the garage . I reached up and hit the garage door remote. When the door began to go up I took my foot off the brake.

NHTSA #: 11574100
criticalENGINE,FUEL/PROPULSION SYSTEM
Filed: May 2022

We own a 2020 Subaru Ascent we purchased brand new. A few weeks ago we noticed a faint gasoline smell while at a red light. I thought it was a one time occurrence but it has been happening now every time the vehicle is at idle or stopped.

NHTSA #: 11463915
highENGINE,LANE DEPARTURE,BACK OVER PREVENTION
Filed: Mar 2026

While driving on the freeway, your check engine light came on and all safety features (lane departure warning and back-over prevention) shut down without warning. You were able to reach a Subaru dealer, where they discovered a recall on the engine. However, when you contacted the manufacturer about the recall, they stated it only applied to the previous owner and refused to help you with the repair. The dealer never disclosed this pending recall when you purchased the vehicle.

NHTSA #: 11726964
highENGINE
Filed: Jun 2024

The battery died after two weeks of replacing it, later revealing the alternator failed. Parts are not available, Subaru kept them My safety was at risk because the lights on my dashboard Christmas Tree'd letting me know something was wrong. Within a couple of blocks I had no power steering and was dying on a busy street.

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NHTSA #: 11592928
highENGINE,VISIBILITY/WIPER
Filed: Sep 2021

I recently bought my Subaru and I noticed the transmission would stall when going in to gear or changing gears and the RPM would be high, also last night I de fogged my windows and drove to my destination and noticed a crack in my windshield from the top where my eyesight is, I did not hear or see anything hit my car windshield, my car didn't give off any warning signs for either of the problems I stated, I have contacted subur 1800subur3 they say there is no recall so now talk to customer service so now I am waiting to speak to them

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NHTSA #: 11432762
highENGINE
Filed: Oct 2019

Odometer: 1,289 miles vehicle was in motion on a city street, drove 3 miles away from home. Battery light came on, vehicle started to overheat and check coolant indicator came on. Opened hood to smoke and serpentine belt had shredded.

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NHTSA #: 11267561
mediumENGINE AND ENGINE COOLING
Filed: Nov 2025

The contact owns a 2020 Subaru Ascent. The contact stated that the vehicle was taken to the local dealer for routine service, where it was discovered that the cam carrier was leaking from the engine. While having an oil change, the mechanic informed the contact that there were no further leaks found.

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NHTSA #: 11697702
mediumENGINE
Filed: Oct 2023

The contact owns a 2020 Subaru Ascent. The contact stated while driving 10 MPH, the accelerator pedal was depressed, and the vehicle had started jerking. The RPMs became elevated however, the vehicle failed to respond.

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NHTSA #: 11550975
lowENGINE
Filed: Feb 2026

Car has 82,000 miles, has been maintained and requires an engine replacement due to 'Sludge'. Reading a lot of forums that indicate this is a common situation with this make and model and likely due to manufacturer's defects.

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NHTSA #: 11717930

Other 2020 Subaru Ascent Issues