2016 Subaru Legacy Electrical System Problems

Battery continuously dies, likely due to a parasitic drain, and it is extremely hard-taking up to 15 to 20 minutes to open the car door using the the wierd key you slide out of the key fob. As a woman, it is very dangerous when my battery dies and I am in a dark parking lot and I can't even get inside the car and lock the door for safety. Been happening for years lastest time was today 02/17/2026. For some reason, the class action suit said I was not a class member for the same problem.

Car battery dies after the vehicle sits for longer periods (approximately 2 weeks or more?). Roadside assistance has tested battery twice after jumping the vehicle and stated the battery is still healthy. Various Subara owners report similar situations in online forums, and the culprit seems to be a design flaw where the DCM module is trying to connect with the obsolete 3G cellular network, causing a parasitic battery drain.

The contact owns a 2016 Subaru Legacy. The contact stated that while driving at 60 MPH, the check engine warning light illuminated. The contact became aware that while the check engine light remained illuminated the horn failed to function as designed. The contact stated that after the check engine warning light issue was resolved the horn returned to normal functionality. The vehicle was not taken to the dealer or an independent mechanic. The manufacturer was notified of the failure but provided no assistance; however, the manufacturer informed the contact that the failure was a known issue and advised the contact to stop driving the vehicle until the check engine warning light issue was resolved. The failure mileage was 184,000.

Battery has failed twice in a matter of a year. Both batteries were top of the line and no reason can be seen for failure. I see that there are a great deal of the same sort of complaints listed here and Subaru should be well aware of this issue.

I've own a 2016 Subaru Legacy Limited 3.6, for coming on 2 years. In the last 3 months I've had to replace my battery twice. The last being a red top battery costing $300+ and only lasted 2 days. The first incident that was most disruptive was, driving home in rush hour traffic when I lost all power, radio cut out, all lights on dash go out, my car begins to sputter and there is no power steering. Once traffic rolled to a stop it dies and wouldn't turn back over, couldn't pull my key from the ignition, roll the windows up, and once in park I couldn't change to neutral. It was very dangerous due to traffic, and I was stuck on a bridge that was a main arterial, with no emergency flashers. Had to have the city law enforcement call to get my car removed from the roadway. Had it towed to the dealership I purchased it from. The next day they told me my battery was dead and I needed a new one. Tested my alternator and that test good. Then again it died under the same symptoms as it did the first time. Leaving me stranded on a busy highway, at 10 at night. All of my symptoms were directly related to my a/c being on and sitting too long without driving, at idle or stop and go traffic and progrssively got to being a main battery drain. My key ittermediately wont pull from the ignition, steering wheel wont lock in place. My windows will randomly not roll up, but bounce down and stop halfway and lock temporarily in that position. I believe its all electrical problems or voltage issues. None the less... if there is no way to repair this, than it should be a recall..... because it's a serious problem with no solution and Subaru is fully aware of it.

Replaced battery but still all dash lights come on I lose power and it dies. I can jump start it and it stay but all lights stay on. New starter, new alternator, I just don't know what it is. Only code that comes up is P0420

Consistent problems with parasitic battery drain. If the car is ever left to sit for more than two weeks, the battery will have died. I have to be careful because the battery does not recoup the energy required to start the vehicle in city driving. The second battery I installed in the car (7/2021) has failed prematurely and again requires replacement.

Battery drainage issue: Battery failed in my 2016 Subaru legacy in 2019, replaced with a new battery and died again in 2020, 2021, and 2022. This should be a recall not a class action lawsuit. Leaving someone stranded is a safety issue. No warning was given when the battery died. It was fine one day and dead the next day. Had to tow the vehicle at my expense to the Subaru dealership and was told that they needed to replace the battery, which I had to pay for and they performed an OBDII reprogramming of the engine control module. The dealership indicated that this should help with the drainage problem but I was not given a guarantee.

BATTERY DIED BECAUSE OF A DRAIN PROBLEM. I HAD TO REPLACE 2 BATTERIES IN ONE YEAR AND TEN MONTHS. HOW MANY BATTERIES MUST I REPLACED BEFORE SUBARU DOES A RECALL? IS THERE ANYTHING YOU CAN DO?

Having a problem with battery draining while the car is turned off. Experienced it previously 24,095 miles and 3 years on the first battery. Had to call AAA and get a jump start, and simply replaced the battery (9/18/19). Over the last year started experiencing similar problems with the replacement battery, and bought a battery charger, so when it would not start in the morning, I would put it on the charger and use my other car (a 2020 Subaru Forester). Took the Legacy to the dealer (10/15/22 - 39,224 odometer reading), he tested the battery, and said there was no problem. Went on vacation for 5 days, came back, and again the car would not start. Took it to another battery dealer, after charging, and they also said there was no problem with the battery. Recently found out that Subaru has agreed to a settlement in a class action lawsuit. Since Subaru understands the problem Hardware/ Software problem with the CAN system, why the affected vehicles are not subject to recall. Vehicles include 2015 - 2020 Outback; 2025 - 2020 Forester; 2015 - 2020 Legacy; 2015 - 2020 WRX; 2019 - 2020 Ascent. I would think the possibility of stranding a motorist in a remote location, adverse weather conditions, etc. would deem this defect to be serious safety defect.

Start up issues, often need to jump vehicle with a relatively new battery. Power window issues

I bought the car used in 07/2020. Took the vehicle to get it checked at a Subaru Dealership Service center. When I returned to pick up my car, it would not start. The shop checked told me the battery was dead and would need to be replaced. I complained that it was functioning fine when I put it in and their reports did not state any issues with the battery. After much complaining they offered a free oil change but I had to pay for the battery. Now, only 26 months into the new battery, it is showing corrosion build up on the battery. Powder and acid. A non Subaru shop just serviced the car and the safety check revealed that the battery was in "Fair" condition with reduced CCA.

UNKNOWN- Car electrical system drains battery to the point, after short drives, does not have sufficient amperage to start motor. No problem with battery, replaced many times, Took vehicle to dealer to trace issue and was told no issue. I found a class action Lawsuit that describe the same issue on multiple car models including mine. My spouse is a handicapped driver and has been left stranded, leaving her in a unsafe environment. No warning signs, first occurred 2017 and several times during the years. Recent failure 08/16/2022

Hello! I have a 2016 Subaru Legacy and have been experiencing issues with battery drain over the last 2 years. I have replaced the battery multiple times, the computer modular, and even the alternator with no solution. My safety is at risk as my wife and i both drive this vehicle and have a toddler. The persistent uncertainty on if the vehicle will start puts us at risk to be stranded and is heightened during this pandemic.

Ignition key stuck in ignition. Cannot remove the key, risk of theft or child entering vehicle and turning vehicle on. Have not had it inspected, many forums online address same issue with Subaru vehicles. Subaru service bulletin 16-112-18R.

My battery keeps dying. I just had to replace it for the second time this year. Used 2 brands, one from the dealership and the other Interstate. I had the alternator and starter checked but those are working. Something keeps killing my battery and would like it fixed. I have missed appointments and had my car towed having to pay over $600 to get it back.

Battery discharges very quickly and also isn't able to power up the vehicle on a cold day. The original battery on my vehicle (2016 model) was replaced a year (04/2018) before I purchased the vehicle as a CPO (June 2019), but on multiple occasions after purchase I had issues with starting up the vehicle and not having the battery charging despite having it run for 45 min or longer. I finally went to a dealership when in June 2021 since I wanted the battery replaced expecting that it would be covered under the 85 month pro-rated warranty for the battery replacement in 2018. However, I was asked to pay for the battery as the previous replacement was a "good will" according to the dealership and so was not eligible for a free replacement. Just from the history of the batteries in the vehicle, I'm not convinced of the reliability or the reserve capacity of the battery especially in cold conditions.

Battery drain after 2 years. Can be inspected. Not yet confirmed by independent sources or inspected by outside party. No warning lamps, notices, or cause for battery to drain (no lights on, all doors closed, etc). First happened one day ago, jumped the battery and quickly died again.

BATTERY IS BEING DRAINED WHEN VEHICLE SITS. I HAVE REPLACED THE BATTERY 2 YEARS AGO AND IS NEEDING TO BE REPLACED AGAIN.

What component or system failed or malfunctioned, and is it available for inspection upon request? Key ignition does not want to release once car is in park and shutdown. I have to wait 15 minutes or more until the ignition decides to release the key. How was your safety or the safety of others put at risk? It is a safety issue as I can't leave my keys on the ignition and wait until someone steals it. It mostly happens during the summer time. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, the problem has been seen by an independence service center. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? My warranty is expired therefore I have not been able to get it inspected without having to pay out of pocket for it. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No warning messages, and it started about a year ago.