2022 Subaru Outback

In September 2026, after a jump start, my vehicle's battery emitted a strong sulfur/rotten-egg odor, indicating overheating and overcharging. I was advised to shut it off immediately. The vehicle is now undrivable and parked, and I am concerned it presents a fire risk. This is the latest failure of a chronic electrical defect documented in the dealer's own repair orders since early ownership: •⁠ ⁠March 16, 2023 (4,985 mi): vehicle needed a jump start. Dealer tested the battery, said it passed, and blamed my driving habits. •⁠ ⁠May 16, 2023 (5,503 mi): vehicle again needed a boost. Battery failed the dealer's test and was replaced under warranty; dealer cited Subaru bulletin 07-213-22R. •⁠ ⁠August 4-8, 2025 (15,188 mi): vehicle again needed a boost. Battery failed the dealer's DCA8000 test (low CCA) and was replaced a second time. A dark-current draw test found the Telematics Data Communication Module (DCM) causing a parasitic draw (code B2A0C); the DCM was replaced. When I arrived to collect the vehicle after being told it was repaired, it would not start in the dealer's own shop. Subaru paid for the DCM repair as one-time goodwill while stating it was not covered by warranty. These repair orders understate the frequency: throughout ownership the vehicle needed a jump start roughly 80-90% of the times I used it, even the day after being driven, and I used roadside assistance several times. I believe this matches the known parasitic battery drain defect on 2021-2022 Subaru vehicles (control modules, including the DCM, failing to enter low-power sleep mode), the subject of pending class action litigation (Taylor v. Subaru of America, No. 2:26-cv-4935) and Subaru technical service bulletins. My dealer replaced the implicated module, the problem recurred, and the vehicle has now had an overcharging event that left it undrivable.

My 2022 Subaru Outback Premium has had repeated intermittent stall/no-start events. The exact failed component is UNKNOWN, but the issue appears related to the fuel system, engine control, electrical system, or heat-related sensor/relay failure. The vehicle is available for inspection upon request. The first event occurred while parked: the engine shut off/would not start, while the dashboard and screen remained powered. After about 30 minutes, it started again. A later event occurred while driving: the engine suddenly shut off, but the dashboard and infotainment screen stayed on. I could not restart the engine for about 10 minutes. When it restarted, the vehicle would not accelerate past about 30 mph, suggesting reduced-power/limp mode. This created a serious safety risk because the vehicle lost motive power while in traffic. The vehicle was taken to a Subaru dealership. The dealer diagnosed the high-pressure fuel pump as failing and replaced it under the powertrain warranty. About one month later, the same issue occurred again while parked: the vehicle shut off, all dashboard warning lights illuminated, and it took several minutes before it would restart. The dealer then stated the battery was weak and replaced the battery. The new battery tested good after replacement. One week later, the issue returned again. A consistent pattern is that the problem occurs when it is hot outside and the vehicle has been running for more than one hour. The vehicle has been inspected by a Subaru dealership multiple times. The problem has not been reliably reproduced by the dealer, but the dealer previously confirmed a failing high-pressure fuel pump and later a weak battery. Warning lamps appeared at the time of failure, including multiple dashboard lights/check engine-type warnings after the engine shut off. There were no consistent warning messages before the stall/no-start events.

The contact owns a 2022 Subaru Outback. The contact stated that while driving at an undisclosed speed and making a left turn, the message "EyeSight Disabling" was displayed. No warning light was illuminated. The vehicle then lost motive power and was unable to restart. The contact called 911, and two bystanders assisted in pushing the vehicle to a Jiffy Lube. The vehicle was towed to the dealer, who determined that the battery had failed and needed to be replaced. The vehicle was not repaired. Upon research, the contact associated the failure with the engine. The manufacturer was made aware of the failure. The failure mileage was approximately 58,000.

I parked my 22 Subaru Outback in my enclosed garage about 11:00 AM. I was in and out of the garage at least five times between 11:00 AM and 6:00 PM and in a room next to the garage the rest of the time. At 6:00 PM I went into my backyard. Upon returning inside the house about 7:30 PM I heard the car running in the garage. The car had remotely started sometime between 6:00-7:30.The keys had been hanging up all day and were not touched. My phone had been placed on a shelf and was also untouched between 6:00-7:30. There was no explanation for why the car started in the garage. Fortunately it wasn't while we were asleep. We took the car to the dealer the next day and were told it was impossible for the car to start under the conditions described above and there was nothing wrong with the car. Although we never had issues with the car previously We drove it from that dealer to another dealer down the road and traded the Subaru for another car so we no longer own it. I just wanted to report it in the event this is not an isolated incident.

On May 19th 2026 around noon time, while we (me and my wife passenger) were driving my 2022 Subaru Outback Touring (2.5L, non-turbo) in active congested traffic on our way to airport, the engine shut off as expected by the Auto Start-Stop system when I came to a stop. When I released the brake pedal to proceed, the engine failed to automatically restart. The vehicle became immobilized in a live traffic lane, creating a serious safety hazard with traffic backed up behind me and oncoming vehicles unable to predict my situation. No warning lights or alerts preceded the failure. After shifting to Park and pressing the ignition button multiple times, the engine eventually restarted. There was no prior history of stalling, no check engine light, and the battery and vehicle have been maintained per Subaru's schedule. This is a critical safety defect: a vehicle that disables its own engine in traffic and fails to restart on demand puts the driver, passengers, and surrounding traffic at immediate risk of rear-end collision. The Auto Start-Stop system should never leave a vehicle stranded in a live roadway. The vehicle is available for inspection. I have/have not yet taken the vehicle to a Subaru dealer for diagnosis.

On June 15th 2026, I was at a red light and the Auto Start-Stop feature shut off the engine. When light turned green, my car lost power and started rolling downhill. During this rolling downhill, the brakes stopped working, I was unable to engage parking brake, and I wasn't able to do anything except find a place to safely use gravity to slow the vehicle down. If the hill was steeper, this scenario could have been deadly. It was so scary, I called 911 for assistance but got lucky I was able to stop the car before there was an accident. It turns out the battery didn't have enough power to allow the vehicle to restart and if this happens when the Auto Start-Stop feature is engage you lose the ability to use the brakes. I spoke to the local dealership and acknowledge that is a problem.

Recently, the 2022 Outback my mom drives has been having some strange electrical issues. About a year-or-so ago the battery in her outback died. Not unusual in Arizona. I replaced it with an upgraded AGM (Interstate) version—same group, same cranking power. No issues. Recently, after an oil change at the dealer, she called back to report that a “Check Engine” light had come on. She was told that she probably had not put the gas cap on properly. Gas cap was on properly; light went off the next day. A few days later the Auto Stop/Start (ASS) feature started acting up (not functioning). A few days later the ASS turned the engine off and did not restart automatically—in the middle of heavy traffic during rush hour. The ASS light came on. The engine started manually, and we got it home. Battery was dead the next morning. I charged it up and took the car to the local mechanic for a quick assessment. The battery was fine, charging, but the car threw a Code: P0871 Transmission Fluid Pressure Sensor Switch. This mechanic told us that there was a Technical Service bulletin through Subaru that addressed this issue but was also aware that it could be caused by the ASS killing the battery OR other electronic modules which fail to enter sleep mode—which would also cause random lights to come on. An appointment was made to take the car into Peoria Subaru, thinking it would be something they could diagnose easily. It had previously been in for the routine oil change with the inspection. When we dropped the car off, I provided the Advisor the code and a associated TSB for the code. We got the car back that day and were told the following: The tech found that the car currently has a “Aftermarket” AGM battery. Subarus require a “Enhanced Flooded Battery” which would explain multiple codes found for loss of communications and parasitic battery drain--for systems that don't go to "sleep" when the car is not running.

The contact owns a 2022 Subaru Outback. The contact stated that while coming to a stop on several occasions, the vehicle unexpectedly stalled. Several unknown warning lights were illuminated. The vehicle was able to be restarted. The vehicle was taken to the dealer. The contact was informed that the battery was functioning properly. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 36,249.