Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2018 Subaru Outback owners, lightly cleaned up (personal details are redacted by NHTSA).
I had pulled into our garage and had come to a stop. With my foot on the brake, I was reaching for the ignition button to turn the car off when the car suddenly accelerated forward and struck our large metal tool box, pushing it through the rear wall of the garage. The vehicle has not been inspected by anyone. No warning lamps or messages appeared.
The battery completely dies after at-least 3 days of not driving the vehicle. Within a few weeks of driving the car off the lot in 2017 (new from the dealership), the car would not start after not being driven over the weekend. I had the car jump started. It happened again the next week after a long weekend of not driving the vehicle. I had it jump started the drove it to the dealership. I was told there was nothing wrong with the vehicle or the batter. It happened again the next weekend and I had to get it jump started again. Since then I have not left the car un-driven for more than a couple of days. On June 18, I took the car for an oil change and was told i needed a new battery. I replaced the car battery that same day. Hooked everything up and the car started just fine. I check all interior lights and headlights to make sure they were all off. …
Arriving at my childhood home, I followed the driveway to the left to park in front of the garage door. With my foot on the brake and slowly rolling to a stop, the car suddenly accelerated and jolted forward making contact with the garage door and the frame of the garage. This caused damage to the house, garage door and the front of the car. Thankfully there was no other car in the way or a pedestrian! Only the house and car were damaged. This was sudden and there was no warning or prior occurrence to make me aware of the problem. We spoke to the dealer service manager and at first he said he never heard of anything like that. After further conversation he admitted that another car had a similar issue. They kept the car for two weeks and couldn't repeat the issue. …
While driving our 2018 Subaru Outback 3.6 the engine quit about 15 miles into our trip while driving at about 45 MPH. It had done this once before where after drifting to a stop and putting it in park it restarted and we finished the trip. This time we drifted to a stop and put it in park and tried to restart the engine. It restarted and immediately quit. We did this several times over a 20 minute time frame. We had it towed to the dealer where it took about 3 hours for them to look at it. It restarted and the fault codes showed it had stalled, but no other problem and no fix to be made. I see this problem in several forums with no fix offered. This is a significant safety issue since braking and steering power are lost.
The battery has drained twice in the time that I have owned this vehicle. Once I was able to recharge the battery by jumpstarting and letting it run. The second time it required a battery replacement. This was approximately 12 months after the first incident. The electrical system also has unpredictable quirks related to the window functions and lighting. I am uncertain to other resulting irregularities that may be occurring under the hood. Currently, my car is being serviced for a radiator fan and motor replacement for the cooling system. The estimate for repair is $1747 + tax. This is potentially related to the electrical quirks related to the battery irregularities.
The car started to make very loud engine noises and then the engine completely failed. The car was no longer able to accelerate and lost the ability to go in both forward and reverse. Luckily, my son had just arrived home when the car completely lost power, but it began to have acceleration issues as he was driving home. No warning lights came on until after the car had completely failed. Less than a week prior to the incident, the car had an oil change and inspection by the dealership and no issues of concern were noted. The car was towed to the dealer. The technician said that the oil contained metal shavings, indicated an engine block failure.
Flex joint connecting to catalytic convertor. For 3+ years, exhaust from engine coming directly into cab, coughing, nausea, burning eyes/nose/lungs/chest. Foul odor, difficulty breathing. The problem has been reproduced and diagnosed by two independent mechanics. The dealer, when initially requested to inspect expeditiously, couldn't get me out the door fast enough. The component has only been inspected by two independent mechanics. There were no warnings. I would like to add that this specific part has already been subject to Subaru Program Bulletin WUB-87, WUJ-95, and is reported by mechanics as common defective part.
I was driving at 40 MPH in the left lane approaching the left hand turn lane. Once I tturned into the turn lane my car started to accelerate very hard. I hit the brake and the car kept acelerating, I pushed the gear shift into neutral and with both feet hard on the brake I was able to stop completely without cutting into oncoming traffic. I have been driving over 50 years and never had an incident like this happen. I do not drive carelessly. However, now I am affraid to drive this Subaru Outback and I will not let my wife or family even ride in it.
The batteries cannot seem to hold a charge. We have called AAA several times, but the recharging doesn't last, and they say this is a problem with the Outback. In addition, the Subaru dealer has replaced the battery twice. It just failed again. This most recent battery fail stranded my 70 year old husband in another city. I have contacted the dealer again asking for service. There is no warning whatsoever that the battery has drained. This is not a safe situation. The date below is the most recent incident of a drained battery.
Normal vehicle start. While leaving shopping mall parking lot, vehicle suddenly shut down; no electrical, no accelerator, no power steering, no engine. Was able to steer vehicle to safe location out of traffic path. Waited approximately 10 minutes, tried vehicle again, and it started / drove normally. Vehicle inspected afterward by dealer, who found no issues, and returned vehicle with no repairs made. Driver is 86 year old widow, who is terrified of being stranded in an unreliable car.
Engine complaints in other Outback years
Frequently asked questions
How common are engine problems on the 2018 Subaru Outback?
NHTSA has 37 complaints about the engine & cooling of the 2018 Subaru Outback, 5% of the model year's 816 complaints.
Is there a recall for 2018 Subaru Outback engine problems?
No. NHTSA lists no engine & cooling recall for the 2018 Subaru Outback, though it has 3 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2018 Subaru Outback engine problems start?
Half of the complaints with a recorded mileage happened before about 6,000 miles, and 87% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 1 fire and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
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.