2021 Subaru Outback Problems

Half of the owners who gave a mileage had the problem by about 3,000 miles. Parts named most: Windshield (9).

What to check before you buy

• Check every light: headlights on low and high, fog lights, brake lights, turn signals and reverse lights.
• Run the wipers on every speed with washer fluid, and run the defroster front and back.

Tools that help

What owners said

I was driving when I heard a loud explosion sound. I first thought a rock or gunshot hit my car and pulled over to examine my car. I checked all around the car and didn't notice any damage on the side of my car but then I noticed that my sunroof was shattered. The glass was pushed outward which meant that it was not hit by an object.…Owner complaint, filed 2024

Since owning this vehicle, we have replaced the windshield at least once a year. The first due to a 1/16th inch chip that evolved into a 10 inch crack over the course of a day. The second was a crack from driver side pillar that appeared overnight, no chips prior. Third was a 8" crack from passenger pillar that appeared overnight while…Owner complaint, filed 2024

Half of the owners who gave a mileage had the problem by about 2,000 miles.

What to check before you buy

• Test every switch: windows, locks, mirrors, seat heaters, the screen, the backup camera, Bluetooth and every USB port.
• Watch the dash at startup. Every warning light should come on briefly and then go out.
• Have the battery and charging system tested. A weak alternator or battery drain shows up here.

Tools that help

What owners said

Vehicle's Auto Start-Stop system shut the engine off while stopped at a red light in [XXX], in rainy conditions in late XXX at approximately 29,000 miles. When the brake was released after the light turned green, the engine did not restart, leaving it stopped in the travel lane in live traffic. The driver had to use a portable jump…Owner complaint, filed 2026

Battery keeps draining if car isn't driven for a few days battery is drained to point of it being dead, cannot get into car, will not start, leaves you stranded. This is the fourth time this year, dealer checks it out tells me nothing is wrong. I have read many problems with parasitic battery drain with subaru's even that the alternator…Owner complaint, filed 2024

Half of the owners who gave a mileage had the problem by about 1,000 miles. Parts named most: Automatic emergency braking (18), Warnings (15), Adaptive cruise control (12).

What to check before you buy

• Where it is safe, try the adaptive cruise and lane keeping on the test drive and watch for sudden braking or warnings with nothing there.
• Check the windshield in front of the camera and the bumper sensors for cracks, chips or poor repairs.
• Ask whether the windshield has been replaced. The camera has to be recalibrated afterward, and many shops skip it.

Tools that help

What owners said

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…Owner complaint, filed 2023, at 14,000 miles

We bought this vehicle new and since we have had issues with the infotainment shutting down multiple times while driving. The infotainment screen along with all safety features associated with the electronic panel turn off. We have taken it to the dealership multiple times and keep getting told that they can't replicate the problem. We…Owner complaint, filed 2022

What to check before you buy

• Ask the seller not to warm the car up, and start it cold. Listen for ticking, knocking or a rough idle in the first minute.
• Pull the oil dipstick and the oil cap. Low oil, a gasoline smell or a milky film on the cap are reasons to walk away or get an inspection.
• Plug in an OBD2 scanner. Stored or pending codes matter, and so do readiness monitors that show "not ready", which usually means the codes were cleared right before the sale.
• Ask for oil change records. A gap in the records on a model known for engine complaints is a negotiating point at minimum.

Tools that help

What owners said

failure/malfunction of thermo coolant control valve some of the systems safety features have been disabled making it unsafe for me to drive vehicle The car gets hot and high beams don’t work heater doesn’t work. Diagnostic was performed by independent mechanic determining this issue Warning lights on dashboard to check engine and many…Owner complaint, filed 2024

The contact owns a 2021 Subaru Outback. The contact stated while at a traffic light, the vehicle stalled. The instrument panel lights illuminated then went dark. The police came but there was no police report filed. The police had the vehicle towed to a dealer. The vehicle was not diagnosed or repaired. The manufacturer was not notified…Owner complaint, filed 2022, at 12,500 miles

What to check before you buy

• On the test drive, press the gas gently and firmly. The response should be smooth with no lag or surge.
• Set the cruise control, then use resume and cancel to make sure each one works.

Tools that help

What owners said

The contact owned 2021 Subaru Outback. The contact stated that while driving at 5 MPH turning a right hand corner into a shopping center, the vehicle began to accelerate without the contacts consent. and the contact proceeded to frantically apply the brakes. The vehicle came to a stop upon impact with a brick wall impacting the front…Owner complaint, filed 2026, at 70,000 miles

The contact owns a 2021 Subaru Outback. The contact stated that while driving 60-75 MPH, the vehicle experienced unintended acceleration. There was no warning light illuminated. The contact stated that the failure recurred while driving downhill with adaptive cruise mode activated. The contact stated that the failure recurred several…Owner complaint, filed 2024, at 25 miles

What to check before you buy

• The air bag (SRS) light should come on at startup and go out within a few seconds. If it stays on, the system may not work in a crash.
• Air bag recalls are some of the most serious. Check this exact VIN for open recalls and get proof any recall work was done.

Tools that help

What owners said

The airbag light came on in my car even though the cars airbags have never deployed. The code that the scanner is bringing up is B1784. The description for this error is Right front occupant detection sensor collision detection, Subaru has a safety recall for this exact issue for this exact year and type of car but are stating my vin…Owner complaint, filed 2026

The contact owns a 2021 Subaru Outback. The contact received notification of NHTSA Campaign Number: 24V227000 (Air Bags); however, the part to do the recall repair was unavailable. The dealer was contacted. The dealer confirmed that parts were not yet available for the recall repair. The contact stated that the manufacturer had exceeded…Owner complaint, filed 2025

What to check before you buy

• Drive it from cold if you can. Shifts should be smooth in every gear, including reverse.
• Feel for slipping (revs rise without the car speeding up), shudder at low speed and a delay when you put it in gear.
• Listen for whining, which is a common CVT complaint, and clunks when you go from drive to reverse.
• If it has 4WD or AWD, engage it on the test drive and ask when the transmission and differential fluids were last changed.

Tools that help

What owners said

I have had this happen several times on my 2021 Outback and my 2013 Outback. The dealership has never been able to recreate this issue. I will be driving (gear in D) and it randomly shifts to 1st or 2nd gear. I have been in a parking lot when it has happened or entering the interstate. I notice it because I hear the engine roar and look…Owner complaint, filed 2025

The contact owns a 2021 Subaru Outback. The contact became aware that the VIN was included in NHTSA Campaign Number: 23V755000 (Power Train) however, the part to do the recall repair was not yet available. An unknown local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the…Owner complaint, filed 2023

What to check before you buy

• Smell around the engine bay and under the rear of the car for raw fuel.
• On the test drive, accelerate firmly from a stop and up a grade. Stumbling, surging or a flashing check engine light are red flags.
• Fuel pump recalls are common. Check this exact VIN for open recalls before you buy.

Tools that help

What owners said

My wife turned into a parking spot slowly with her foot on the brake, and the car suddenly accelerated without warning. It went up on the curb while my wife slammed on the brake and stopped the car. She then put the car in reverse and backed into the parking spot. Came home without further incident but was very upset. I intend to…Owner complaint, filed 2023

Driving at 65 mph, engine stopped taking gas, slowed to below 30 in heavy freeway traffic. Resumed normal operation in about a minute. Then failed in similar fashion 5 minutes later. Took my 2021 Subaru outback xt to the dealer where purchased. They have been unable to duplicate the issue and want me to drive the car without any fix. I…Owner complaint, filed 2021

What to check before you buy

• The pedal should feel firm and the car should stop straight without pulling, grinding or a pulsing pedal.
• The ABS and stability control lights should go out after startup and stay out.
• Look through the wheels at the rotors. A deep lip on the edge means brakes are due soon, which is a fair thing to negotiate on.

Tools that help

What owners said

With 22,000 miles my front rotor brakes need replacing and I don’t have a heavy foot! This is my 5th Outback and so my history vouches that I’m not a driver that wears down brakes or tires. When I did some online searching, there are a number of people posting with the same experience. Subaru knows there is a problem because they are…Owner complaint, filed 2023

The contact owns a 2021 Subaru Outback. The contact stated while driving approximately 40 MPH, the check engine, ABS, and brake warning lights illuminated. The contact pulled over to the side of the road. The contact turned off the vehicle and waited for several minutes before restarting the vehicle; however, upon restart the…Owner complaint, filed 2024, at 24,000 miles

Parts named most: Body (7).

What to check before you buy

• Look underneath with a flashlight. Utah road salt is hard on frames, brake lines and the bottoms of doors.
• Open and close every door, the hood and the liftgate, and lock and unlock each one.
• Use a paint thickness gauge and compare panels. A panel that reads very differently from the rest has likely been repaired.

Tools that help

What owners said

A design flaw in the remote (required for both keyless entry and vehicle operation) leads to accidental trunk openings due to "pocket trunk opening". This is a safety hazard as it could lead to humans or animals entering the vehicle, as well as a potential route to water damage. This happens while the vehicle is parked and locked, and…Owner complaint, filed 2021, at 500 miles

Sunroof exploded driving home in 90 degree sunny and clear weather. It sounded like a gun went off right over my head. It scared me so bad I jerked my steering wheel into the other lane. Thank God no one was in that lane. I had to get it replaced at Mid State Glass company. according to what I found on the internet this happens rather…Owner complaint, filed 2025

What to check before you buy

• Read the four-digit DOT date on each tire. Tires older than about six years should be replaced, whatever the tread looks like.
• Check tread depth on all four. On AWD vehicles all four tires should match.
• The tire pressure light should go out after startup.

Tools that help

What owners said

Loud cabin roar since purchase. Diagnosed on 11/1/2022 to be front right wheel bearing being bad (not damaged/worn) at 40k milesOwner complaint, filed 2022

Driving on grooved concrete highway the car wandered all over the road. It feels very un-safe and that you are not in control of the car. This started the day I pick up the car 2 weeks ago, 1700 milesOwner complaint, filed 2021

What to check before you buy

• Turn the wheel lock to lock while parked and listen for groaning, clicking or binding.
• On a straight road the car should track straight with the wheel centered and no loose feeling.
• A power steering warning on the dash, even briefly, deserves a mechanic’s look before you buy.

Tools that help

What owners said

The contact's wife owns a 2021 Subaru Outback. The contact stated that while driving at various speeds, the vehicle experienced loss of power steering as the power steering warning light and several unknown warning lights were illuminated. The contact stated that the failure occurred on several occasions. The vehicle was taken to a local…Owner complaint, filed 2023, at 17,500 miles

I am filing this complaint regarding multiple serious safety defects in my 2021 Subaru Outback purchased in July 2021, currently at 48000 miles THERMO CONTROL VALVE FAILURE (26,307 miles) While traveling in the center lane on [XXX] southbound in [XXX] the evening of 1/6/2024 my vehicle suddenly experienced a complete loss of control. It…Owner complaint, filed 2026

What to check before you buy

• Drive over a few bumps and potholes slowly with the radio off and listen for clunks or rattles.
• Check the tires for uneven wear on the inside or outside edges, a sign of alignment or suspension trouble.
• Look behind the wheels for oily, wet shocks or struts.

Tools that help

What owners said

I am filing this complaint regarding multiple serious safety defects in my 2021 Subaru Outback purchased in July 2021, currently at 48000 miles THERMO CONTROL VALVE FAILURE (26,307 miles) While traveling in the center lane on [XXX] southbound in [XXX] the evening of 1/6/2024 my vehicle suddenly experienced a complete loss of control. It…Owner complaint, filed 2026

The car was built & sold new, with the rear suspension not aligned properly, and cannot be aligned to factory specifications. The car has been taken to 4 service stations, 3 Subaru dealer service repair shops, without being able to be aligned.after further investigation, I’ve found this to be a common problem for this vehicle type. I…Owner complaint, filed 2024

What to check before you buy

• Pull out and latch every seat belt, and let each one retract on its own.
• Try every seat adjuster, and watch for a passenger air bag "off" light when an adult is in the seat.

Tools that help

What owners said

This is 3 years old with 27000 miles. The driver's side seat has cracked and tear. This is what subaru is putting out there for the public. Cheap material and poor workmanship.Owner complaint, filed 2024