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Electrical system

2021 Subaru Legacy Electrical problems

Owners have filed 5 complaints about the 2021 Subaru Legacy's electrical system with NHTSA - 16% of all its complaints, most recently on October 27, 2025. Dead batteries, warning lights, wiring, alternators, infotainment and electronic module failures.

Complaints
5
Recalls
0
Crashes
0
Fires
0
Injuries
0
Deaths
0

Electrical complaints

Engine & coolingElectrical system

The contact owns a 2021 Subaru Legacy. The contact stated that while driving at various speeds during colder weather, the heater failed to operate as intended. Additionally, the Eyesight system was inoperable. The check engine and other unknown warning lights were displayed. In addition, the contact stated that the engine failed to warm up as intended after being started, and the engine temperature was 107°F, which was below the normal engine temperature of 200°F. The vehicle was taken to a local dealer, where it...

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was diagnosed, and determined that the Thermal Control Valve needed to be replaced. The contact related the failure to Technical Service Bulletin: 09-119-24; however, the vehicle was not repaired because the vehicle had a Salvaged Title. The manufacturer was made aware of the failure. The failure mileage was approximately 60,000.

Filed Incident Engine and engine cooling · Electrical systemNHTSA 11695854
Electrical systemAirbagsDriver assistance

ODS sensor recall still not fixed/remedy available, used heat for first time since i purchased the car, minor cracks in the windshield, car radio/monitors randomly go black, reverse camera won't work, restarts on there own after a while

Filed Incident Electrical system · Air bags · Back over preventionNHTSA 11623360
Electrical systemAirbags

recall not fixed yet, what happens if a car hits me & the passenger airbags don't work? unsafe, doesn't seem like it's being fixed in a timely manner

Filed Incident Electrical system · Air bagsNHTSA 11594923
Electrical system

Battery died completely, left me stranded at a gas station. I had to call and get a jump. I've had the car 9 weeks, it only has 690 miles on it. No warning lights prior, did notice a slightly longer crank a couple days prior. I was told by the dealer that I don't drive enough, and I should keep my key at least 30 feet away when the keys are in the house, because that can silently drain the battery. I had not left any lights on or had done anything to drain the battery prior to this occurring. I drove to the gas station with no problem, upon restarting after getting gas, no power, car was dead. I couldn't even move the shifter knob into neutral.

Filed Incident Electrical systemNHTSA 11435081
Electrical systemDriver assistance

There seems to be an issue with the infotainment system. The system will randomly turn off which also turns off the safety features. I would like to associate this while CarPlay is in use, but I have witnessed it happen without CarPlay. Subaru has already replaced the head unit under warranty, but the problem continues. For the cost of the car, this should not be an issue.

Filed Incident Electrical system · Forward collision avoidanceNHTSA 11432643

Subaru Legacy electrical complaints by year

Legacy electrical problems, every year

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Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data

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