Subaru Crosstrek battery drain problems

Filed Nov 9, 2026 · Electrical · CO

From February 2025 to June 2026, I’ve had to have my car battery replaced 3 times. Before the battery dies, I normally lose all of my pre-programmed radio stations, have to increase the volume, and my car will take longer to start. I’ve brought this attention to a Subaru Dealership (where I go for all of my repairs) and was told that if this keeps occurring, they will have to send an engineer out to look at my vehicle as it passes the parasitic draw test.

Filed Oct 23, 2026 · Electrical · SC

The dealership network has already made two (2) separate, unscheduled service attempts to diagnose and fix this ongoing battery drainage issue: 1.First Repair Attempt: July 9, 2026, at McDaniels Subaru of Columbia, Mileage: 2356. Vehicle would not start. When start button was pushed dash lights would flicker on but would not turn over engine. Not being that familiar with the electronics of the vehicle I thought it may be that my wife had somehow disabled the vehicle by trying to get the key fob to work. Lights on the dash indicated the key fob was “disabled” . (The “disabled key fob” warning light can indicate a dead battery). I left vehicle, returned with the spare key fob, but still same result until I was able to get a “jump”. Vehicle seemed OK then. At home I charged battery and my charger said it was “fully charged”. Result: Technician apparently only tested the key fob, even though the repair order states the battery was tested. Nothing was found by the technician that would indicate why vehicle would not start or that battery was drained. (The “disabled key fob” warning light can indicate a dead battery) 2.Second Repair Attempt: Result: : October 5, 2026, at McDaniels Subaru of Columbia, Mileage: 3243 Vehicle would not start in garage at home. Sent various videos to dealer service department of how the vehicle was not starting. Dealer technician advised it appeared to be a dead battery. I made an appointment for the following Monday. I also charged the dead battery. My charger indicated a “bad battery”. 3. Result: Factory battery replaced. I asked for a replacement battery at the time of appointment. I asked for an AGM battery to better withstand the severe drain on the battery from the ignition/starting system but was promptly refused. Despite these efforts, the issue persists. Research and expert dealer consultation indicate that the factory battery is fundamentally underpowered for the technical start-stop and electronic load demand

Filed Jun 17, 2026 · Electrical · WI

2019 Subaru Crosstrek; Battery is drained even when car is fully turned "off". If the car is not driven every day, battery may drain completely and car won't start. If not driven for several days, battery will discharge so low that it is damaged, in which case it may not have sufficient charge to start the car after sitting overnight. After battery is discharged to the point of damage, it must be trickle charged anytime the vehicle is not driven, and even short periods and distances of driving will leave the battery at 25% (or less) of fully charged. Battery replacement is the only way to restore normal operation, but the replacement battery is gradually degraded and ruined just like the original. SOA has not recognized this parasitic battery drain problem in this vehicle. Jump starting the car with auxiliary battery is possible, but this does not reduce the risk of battery insufficiency. Subaru instructs me to have dealer diagnose the problem (at a cost of about $200) and then it might consider a gratis contribution to full cost of diagnosis and repair (estimated at $1,662 including cost of diagnosis). No warning, visual or aural, alerts the driver to this problem.

Filed Jun 10, 2026 · Electrical · WI

The DCM on our 2021 Subaru Crosstrek is causing a parasitic drain on the battery. It left us stranded several times. We replaced the battery twice in the past 15 months. There is a class action lawsuit against Subaru for this exact problem, but they won't replace it on our vehicle because it has over 45,000 miles. A defective DCM is a widely known problem with many Subaru models. We never received notice of this problem from Subaru, nor were there any warnings, messages, or indications that this was a problem, until we took it to a mechanic for service, who sent us to a Subaru dealer because it had to be repaired by them.

Filed May 16, 2026 · Electrical · ME

Purchased in August 2024, had to get a new battery 2 days after purchase & then went to the dealership January 2025 because my battery kept dying & I was stranded at the airport late night. They acknowledged is has a parasitic draw but did not notate the source. They claimed I needed a new battery when my previous Subaru branded battery was only 5 months old. The new battery was almost $600 which is double/ triple a store branded equivalent. I purchased yet another battery but non-Subaru branded since theirs did not last even 6 months. Still have been experiencing the same issue. I pulled the dcm fuse and let my car sit for several days as a test. The battery did not die with the dcm fuse removed. The front speakers and Bluetooth are linked to the dcm fuse so they do not work if it is unplugged.

Filed May 11, 2026 · Electrical · VT

While driving 2020 Crosstrek Hybrid, the dashboard lights suddenly flashed and then engine stalled, leaving me with no brakes and no steering. I rolled through straight through an intersection with four stop signs and I could not stop. Luckily no one was driving or walking at the time. I couldn't start car, even with a jump start. I bought a new Interstate battery with higher specs. Three days later the same thing happened, the car stalled while driving just about to park. The dashboard lights also flashed and I saw Hybrid System this time. Car was towed to the dealer and there was a huge amount of corrosion with the electrical system underneath the car. Previously, four times this winter the car batter was completely dead after being parked in a garage and twice in a parking lot. I was told by a mechanic who gave me a jump start that there's a parasitic drain somewhere.

Filed May 7, 2026 · Electrical · GA

Replaced battery 3 times. Believe this car has the parasitic battery issue. Attached on of the bills. Looking for the other 2.

Filed Mar 10, 2026 · Suspension · PA

Starting at around 75,000 mileage on my 2018 Subaru Crosstrek, a persistent howling noise is heard while driving. This noise comes from the rear of the vehicle and occurs at nearly all driving speeds, measuring at around 90.0dB while on a highway (a dangerous level for prolonged exposure). A service shop and the dealership have both diagnosed the noise as an issue with the rear wheel bearings (consistent with Subaru Service Bulletin 05-70-19R). In January 2026, my low tire pressure warning light appeared on my dashboard. I checked the tire pressure with a gauge and found no issue. I assumed (and later confirmed while getting a tire changed) that the tire pressure sensor had a dead battery, and that the warning light was related to this dead sensor rather than an issue with the tire pressure. Before getting the sensors replaced, I drove for a week with the low tire pressure warning light on my dashboard. I ignored this sensor because I confirmed daily with a pressure gauge that the tire pressure was fine. However, one day while driving in February 2026, I got a flat tire on the front passenger side. I drove with this flat tire for at least six miles, not knowing I had a flat. The howling noise from the rear wheel bearings masked the noise from the flat tire, and I could not audibly distinguish anything out of the ordinary with my car. Unfortunately, this occurred in the same period of time that my tire pressure warning light was giving false flags for low tire pressure. I feel it important to log this issue because - had my rear wheel bearings not been making a howling noise - I would have noticed the flat tire immediately and would not have posed a safety risk to myself or other vehicles.

Filed Sep 4, 2025 · Electrical · IL

Subaru owners have reported experiencing premature parasitic battery drain in vehicles equipped with Starlink in-vehicle technology. The defect presents itself when the equipped data communications module (DCM) attempts to communicate with 3G cellular networks. As 3G networks within the U.S. are no longer functioning, the call will continuously fail even after the vehicle has been turned off, draining the battery and resulting in a no-start safety risk for drivers. According to those familiar with the issue, the only solution to the battery drain defect is to remove the DCM fuse, thus disabling vital safety features such as hands-free calling. This issue is happening to me specifically, as I have had to jump my car multiple times within a week long period if in a bad cell range area. I have brought this into the dealership multiple times, under warranty, and presented this to them. They refuse to fix, even though multiple online threads and lawsuits point to this issue being known.

Filed Aug 27, 2025 · Electrical, Lights · MN

Vehicle had a parasitic draw, was in the shop for an extended amount of time, I believe wiring issues were caused from this as well, I had to replace my driver side window switch, buy an optima battery, and drive 3.5hrs to a Subaru dealership in the middle of the winter hoping I’d make it safely and without stalling, the DCM was found to be at fault similarly to other vehicle owners included in another recall that somehow excluded 2019 Crosstrek drivers and included other MY variants such as the Outback and Forester of which also had a bulletin posted about this parasitic draw and how to go about warrantying the costs associated with the repair. I incurred many costs travelling, horrible gas mileage during this time, and a battery replacement. Additionally I lost My workstudy position the following semester due to the unstable vehicle issues and attendance concerns when shuttling the car to the dealer for these warranty repairs (if even covered at all)