2020 Subaru Outback: battery drain or dead battery

Filed Jul 13, 2025 · Electrical, Engine · AZ

Car stalled in traffic. The engine was cranking but it would not start. Had AAA tow off the road and to my home. Car sat for 10 days waiting for a fuel pump (thought this was the problem). After sitting for 10 days the battery was totally dead! New fuel pump installed battery was jumped but could not start the car. After 2 hours on the charger the battery still did not have enough energy to turn over the engine. Car is in a certified service shop (Wilhelm). Battery replaced and same starting issues with the new battery and the new battery is discharging at a very high rate even though the car is not starting. Bought the car used in 2023 so I have no knowledge of the history of the car. Service provider running factory diagnostic testing but so far no determination as to cause of the high rate of discharge. Verified that the fuel pump is fully operational. What we know is that with a fresh fully charged battery and a working fuel pump the car will not start and remain running. The engine stops and the battery drain is excessive.

Filed Feb 19, 2025 · Electrical · CA

For our 2020 Subaru Outback, we are on our 3rd battery at only 49k miles. The car died again today. Thankfully AAA was able to jump it after a friend tried unsuccessfully. We suspect all of this battery drain, failure and replacement has been due to the known Data Communications Module (DCM) issue on recent Subaru’s. I have an appt w the dealer in Santa Monica tomorrow morning to have it diagnosed.

Filed Oct 5, 2024 · Electrical · CA

We are on our 3rd battery in < 4 years. Subaru is well aware of this issue in their engineering in the parasitic drain from the Starlink module. AAA won’t even replace these batteries anymore because the problem is so prevalent. Meanwhile, I’m about to have to buy a 4th battery less than 4 years after purchasing the car.

Filed Feb 24, 2024 · Electrical · WA

The NEW car battery was replaced by seller early in the first year. The car would not start after stopping. Now the same again dead battery symptom reappears. Upon trying to start, the electrical system will not shut off at this time and will drain the battery down yet further. After stopping the car it will not start without fully recharging. Early on, once the car stopped running while I was in gear driving down the road. Though it did restart this time. I have been unable to disable the engine from stopping at stop signs which is a BIG concern. The last few recharges have only lasted days. I'd say the battery is now gone. And now also, when the battery is charged, the rear hatch will not open. This is a big concern. Dependent upon who you talk to at the Subaru Dealers, you will get numerous answers for this concerns. Buy another car? As to the rear hatch, the Manual shows I can just pull a cord on the inside. None can be found.

Filed Feb 5, 2024 · Electrical · TX

Starting in September of 2023, my 2020 Subaru Outback began having issues with the battery. After replacing the battery, having the vehicle died, being left stranded in unsafe scenarios, paying for , and associated repairs, I was told the DCM panel was found to be faulty and causing repetitive battery drainage and failures. The DCM is trying to connect to an old network without success causing the battery failure. This occurred twice in September, once in December, and three times in January of 2024.

Filed Nov 15, 2023 · Driver assistance, Electrical · NC

Per Subaru there is something wrong with the Cockpit Control Module (CCM) that is causing a constant / parasitic draw on the battery. This results in the battery being dead within 4 hours, leaving us constantly stranded. Because the CCM also controls the electrical system, many of the safety features (auto breaking, lane departure, etc) turn off randomly. This is the diagnosis from our local Subaru dealership: COCKPIT CONTROL MODULE IS DRAWING 2 AMPS. WITH COCKPIT UNPLUGGED THERE IS STILL A 1 AMP DRAW. WILL NEED TO REPLACED CCU THEN FIGURE OUT WHERE THE OTHER 1 AMP DRAW IS. UNABLE TO DIAGNOSE WITH MULTIPLE SYSTEMS DRAWING I have opened a case with Subaru of America, but with no resolution.

Filed Jan 9, 2023 · Electrical · TX

My car has a defective battery or a paracytic leak that the manufacturer (Subaru) acknowledges but selectively addresses. The problem is described at subarubatterysettlement.com. I have had to return my 2020 Subaru Outback to the dealer five or six times with a dead battery that has trouble recharging and maintaining a charge. Each time this occurs, I have to have the car towed to the nearest dealer for extensive (like days) testing. Under some magic circumstance, the battery is either returned-recharged or replaced. I have had to return my car with a dead battery to my dealer four or five times. Each time it is the same. "yes, your car battery is warranted (first for 3 years, now for 10 years)," but the reliability of the car's battery is never resolved. Again the catch is I cannot replace the battery myself without voiding a 10-year warranty on the engine, but to keep the contract, I must have my car taken to my Subaru dealer for them to test it to make sure that the car battery is dead...or something. This is a safety problem because the car often doesn't have the cranking amps to start. And the vehicle is designed to shut the engine off at a stop and auto start when your foot is taken off the brake. This means my car could arbitrarily die at an intersection. I have disabled the auto-start feature but I cannot leave my car at the airport for fear that when I return I will have to have it towed to my Subaru dealer for testing.

Filed Nov 26, 2022 · Electrical · PA

Battery drained / dead after left sitting for 4 days. Read about a class action lawsuit for this issue. Left me stranded and had to call roadside assistance

Filed Nov 14, 2022 · Electrical · VA

Battery died and wouldn't take a charge, car was towed to Subaru dealer and I was told I must have done something wrong that car was fine and battery took a charge from the dealer and was in good health. The tow truck driver was unable to jump the car. I was unable to ride with the tow truck driver because of covid. The car continues to have battery issues and the electrical system has hiccups from time to time where I can't get the door to look or the car doesn't recognize that I have shut it off. In the past 2 weeks the battery has died in the time it takes to unload groceries from the car. I drive a lot by myself and have been stranded when stopping for gas. I am taking the car to the dealer this Friday. I had to find out about the class action suit on Google! I was told this was unique to me.

Filed Sep 27, 2022 · Electrical · MD

Car was purchased in 9/2020. Battery died in March 2021 (needed jump start) and again in October 2021 (battery replaced)

Filed Sep 16, 2022 · Electrical · MO

Battery drained without reason

Filed Sep 15, 2022 · Electrical · IL

Battery died a month after purchasing the car used. Now the new Subaru OEM battery, that replaced the original, is also failing on a regular basis. I have to charge the battery about every other time I try to start the car.