Most common 2021 Subaru Outback problems
Share of the 298 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Subaru Outback complaints by model year
Best Outback years: 1996, 2004, 2003. Years to avoid: 2019, 2020, 2017, 2018, 2022. Compare all years →
2021 Subaru Outback recalls (4)
Air bags › Sensor › Occupant classification › Front passenger
Subaru of America, Inc. (Subaru) is recalling certain 2020-2022 Outback and Legacy vehicles. A capacitor in the sensors for the Occupant Detection System (ODS) may crack and short circuit, which can prevent the front passenger air bag from deploying in a crash.
Remedy: Dealers will replace the ODS sensors on the front passenger seat, free of charge. Owner notifications were mailed February 3, 2025. Owners may contact Subaru customer service at 1-844-373-6614.
Power train › Automatic transmission › Park/neutral start interlock switch
Subaru of America, Inc. is recalling certain model year 2021 Crosstrek, 2022 Forester, 2021-2023 Legacy, and Outback vehicles. An insufficient weld may allow water to enter the inhibitor switch, causing it to fail.
Remedy: Dealers will replace the inhibitor switch, free of charge. Owner notification letters were mailed January 8, 2024. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WRQ-23.
Power train › Driveline › Chain/belt
Subaru of America, Inc. (Subaru) is recalling certain 2020-2021 Outback and Legacy vehicles. A programming error in the Transmission Control Unit (TCU) may allow the clutch to engage before the drive chain is completely clamped.
Remedy: Dealers will reprogram the TCU, inspect TCU data for chain slip, and visually inspect the chain guide. If evidence of chain slippage or damage is found, the transmission will be replaced.
Power train › Shift linkage/cable/rod
Subaru of America, Inc. (Subaru) is recalling certain 2021 Outback and Impreza vehicles. The continuously variable transmission (CVT) select lever cable nut may not have been tightened properly, allowing the nut to loosen.
Remedy: Subaru will notify owners, and dealers will inspect, and, if necessary, tighten the nut, free of charge. The recall began February 12, 2021. Owners may contact Subaru customer service at 1-844-373-6614.
What 2021 Subaru Outback owners say
Windows, wipers & sunroof all 107 →
The contact owns a 2021 Subaru Outback. The contact stated that on three separate occasions the windshield cracked without impact. The vehicle was taken to the same dealer after each failure and was informed each time that a rock chip might have caused the failure. The contact purchased a carbon steel film after which he was informed would prevent the windshield from breaking in the event of another cracked windshield, with the purchase of this protective film, he could have a total of 4 windshield replacements free of charge. The contact stated that each failure obstructed his vision while driving. The manufacturer was not notified of the failure. The vehicle was repaired. The failure mileage was approximately 6,000.
The contact owns a 2021 Subaru Outback. The contact stated while driving 75 mph, a small rock struck the windshield and made a small mark at the bottom of the passenger's side windshield. The contact continued driving and the crack started to expand across the windshield. The contact stated that the next morning the crack was approximately 3 feet in length. The vehicle was taken to a window shop and the front windshield was replaced. The contact stated that on June 25, 2021 while driving 20 mph, the windshield cracked. The vehicle was not diagnosed nor repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was approximately 3,000.
Electrical system all 76 →
The engine block of our car caught fire while it was parked and turned off. It melted the engine and hood of the car, totaling it. Thankfully, we were not in the vehicle when the incident occurred, so no one was injured. At the time of the incident, our car was parked outside our apartment building under a low-hanging tree, which was burned in the fire. Had a neighbor not noticed and called 911, the fire may have spread to the nearby apartment building and caused much more severe damage than what was already done to the car. We had no warning prior to the incident. To our knowledge, the car was in perfect condition. We had bought it brand new 16 months prior and had taken it in for its scheduled maintenance 3 times. We are unaware if the vehicle has been inspected yet or if they've discovered the origin of the problem. …
The contact owns a 2021 Subaru Outback. The contact stated while starting the vehicle, the starter motor was making an abnormal clicking sound. The contact stated that after several attempts the vehicle was started. Additionally, the contact stated that at times the instrument cluster was blank. The contact stated that he purchased a battery charger and recharged the battery; however, the failure persisted. The contact stated that once he had fully charged the battery the vehicle was started; however, sometimes the vehicle failed to shut off and the battery terminals had to be disconnected. The contact drove the vehicle to a local dealer who diagnosed that the OE battery was not sufficiently powerful to start the vehicle and provide power all the electrical functions. The dealer installed a new battery with more amperage and new cables. The vehicle was repaired. …
Driver assistance all 32 →
The contact owns a 2021 Subaru Outback. The contact stated that while driving approximately 68 MPH with the cruise control activated, the vehicle suddenly lost motive power. No warning lights were illuminated. The contact stated that it was difficult while attempting to shift the gear lever out of drive(D). The contact stated that once she was able to shift the gear shifter, she shifted into park(P) to turn off the vehicle. The vehicle was restarted after multiple attempts. The contact then noticed that the parking brake had engaged independently. The vehicle was taken to a local dealer, where the failure could not be duplicated. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 14,000. …
On 10/29/25 the car lost power once it got to 3500rpm. Multiple warning lights came on. On 11/06/2025, the Thermo Control Valve, high pressure fuel line, and gaskets for intake manifold and EGR were replaced. On 11/24/25, when backing up slowly in a small parking lot, the rear camera detection picked up a raised cement walkway with metal railing. The brake was applied by the driver, however the car accelerated quickly and slammed into the railing and cement. The vehicle was placed into drive after the collision and continued normally. The brake was on once the warning light beeped and prior to the collision. The foot was not removed from the brake pedal until it was in drive. It could not have been placed into drive without the brake pedal being pressed. …
2021 Subaru Outback engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.5L 4-cyl | CVT | AWD | 26 / 33 / 29 |
| 2.4L 4-cyl turbo | CVT | AWD | 23 / 30 / 26 |
EPA ratings. Class: Small SUV.
Frequently asked questions
Is the 2021 Subaru Outback a good car?
Based on 298 owner complaints filed with NHTSA, the 2021 Outback rates avoid: 3.0× as many complaints as a typical year of the Outback at the same age. It is one of the Outback years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2021 Subaru Outback?
The windows, wipers & sunroof — 107 complaints, 36% of all complaints for this model year, most often about windshield. Next are the electrical system (76) and driver assistance (32).
How many recalls does the 2021 Subaru Outback have?
There are 4 recalls for the 2021 Subaru Outback, the most recent from March 22, 2024 (front passenger). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Subaru Outback?
The best years by complaints, compared at the same age, are 1996, 2004 and 2003. Years to avoid or approach with caution: 2019, 2020, 2017, 2018 and 2022. See the full Subaru Outback years comparison.
At what mileage do 2021 Subaru Outback problems happen?
The median mileage reported in complaints is about 4,000 miles; 97% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.