Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2015 Subaru Legacy owners, lightly cleaned up (personal details are redacted by NHTSA).
I am the original owner of the vehicle in question. I have been experiencing excessive electrical drain issues throughout the life of my vehicle. I have had to jump it at least 10 times and have replaced the battery 4 times throughout my 7 years of ownership. This is quite excessive and has caused safety issues in the past as you never know when the battery suddenly no longer has enough power to start the vehicle. My fianc was recently on a ferry and upon landing the vehicle would not start and this caused quite an issue with the ferry operator and resulted in undue stress and anxiety on her. I have also always had an issue with the Adaptive Cruise Control system (EyeSight) in which under what I believe are specific circumstances, the system fails to detect the roadway and road markers in front of the vehicle and abruptly shuts off. …
We have owned two 2015 Subaru Legacy sedans. Both of them have had major battery problems. We've had to have battery tenders (trickle-chargers) installed on both cars, and we're still having battery problems. We've been stuck in various parking lots, unable to start the car, and had to get jumps from others. This is a royal pain, and a potential safety hazard if we are stuck in a remote location. We've been told by our mechanic that this vehicle does not really "turn off" when you shut it down. There are several devices in the car which continue to have a "parasitic draw" on the battery, which it is not capable of sustaining. We've had the battery and charging system checked out multiple times, and everything checks out fine. Replacing the battery will NOT solve the problem. Replacing the battery with a deep-cycle battery will NOT solve the problem. …
When I was in the garage (about 2 months ago) trying to start my car, it tried to start but did not. Repeated attempts to start the car failed, and it acted like the battery was low. I measured the battery voltage and it was only 5.9 volts. I recharged the battery and took it to an auto parts place to get a new battery. They tested the battery and said it was still good and would not recommend replacing it. The car has been fine since. I realize this is not exactly a safety issue except if it had happened someplace remote and not in my garage where I could work on it it could have been bad. I just found out there is a class action lawsuit against Subaru over their CAN system that sometimes fails (does not go to sleep) and causes the battery to run down faster than it should. It sounds to me like that is what happened to my car. …
Extremely high, abnormal parasitic draining of my battery, in my 2015 Legacy whenever vehicle is not running. This parasitic drain on battery will leave you stranded, if parked for a few days, causing a safety issue, as you can imagine. I always connect and use a battery tender/maintainer with hood up, after every time I use car, when I return car to garage. If I did not have a garage, I would have to connect to this battery charger/maintainer and close the hood to deter exposure to the elements, such as snow, ice, and rain. It is not actual fault of battery, as new perfect battery will drain within a few days with this extremely high parasitic drain. I thought possibly if I blocked the battery remotes from contacting the car, I could reduce this drain. I placed the two remotes into a metal container and then I placed this into a second metal container. …
CAN ( Controller Area Network) is causing a parasitic draining of my battery causing me to have to jump my car regularly and I changed the battery less than a year ago. I know that I'm not the only person that has had this issue, I'm aware of the current class action lawsuit out against Subaru for this current situation. This is a very costly a serious issue that demands attention now. It's very dishonest of Subaru to tell you that nothing's wrong or offer any fix, all while taking our hard earned money. I'm very frustrated because I can't afford to continue messing with this issue nor can I simply go out and buy another vehicle. I have been left stranded both at home and aboard leaving my wife and kids not too mention myself at risk. I have taken the vehicle in and haven't had any remedy. No other failures at the time of this reporting.
When the car sits unused for more than several days, it goes completely dead. I have had both my mechanic and the dealer check the entire charging system ( battery, alternator, engine drive belt etc ) to no avail. Everything tests as working within given parameters and my 2015 vehicle w/ 67,000 miles is currently on it's 4th battery ! The dealer has refused to perform the two Technical Service Bulletin(s) issued by Subaru corporate unless l pay for them, as they claim they can find no evidence to show they are needed. As a disabled retiree, I cannot depend on this, my only vehicle, to go to doctors appointments, food shopping and other normal necessary daily activities. Thank you, [redacted]
I have a 2015 subaru legacy 2.5i engine. The problem i have is a blown fuse in the main compartment F26 (backup). I have read subaru forum(s) and in earlier years this is same issue that I current have in my car. In the older models this was recalled and the issue was reworked at subaru repair centers at their cost. This issue also said it could cause a over heating and possible cause a fire. Please look into this issue. Kind Regards, Doug Whittemore 57 lexington ave. haverhill, MA 01835
Battery continually dies. Driven daily and even after driving same day battery will be dead. Issue occurs more frequently when headlights are set on auto. Seems battery drains when car is off but still pulling a charge. Have been stranded numerous times since purchasing the car 2 years ago. Have had battery checked and told it is fine.
Electrical system drains battery very frequently. I have had alternator checked and is fine. This vehicle drains batteries leaving the car unable to start. The batteries will be dead by the 2 year warranty. I see there is a lawsuit in NJ showing the CAN electrical system does not go to sleep when the car is off.
I just brought this car a few months ago and i have been having alot of problem with it from engine oil low when it not to tpms light coming on and going off to now eletric parking brake locked up now i cant move my car and i work seven days a week and always maintain my cars was getting checked its really weird
Electrical complaints in other Legacy years
Frequently asked questions
How common are electrical problems on the 2015 Subaru Legacy?
NHTSA has 37 complaints about the electrical system of the 2015 Subaru Legacy, 23% of the model year's 160 complaints.
Is there a recall for 2015 Subaru Legacy electrical problems?
No. NHTSA lists no electrical system recall for the 2015 Subaru Legacy, 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 2015 Subaru Legacy electrical problems start?
Half of the complaints with a recorded mileage happened before about 12,000 miles, and 63% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 2 fires and 2 injuries to electrical system 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.