2018 Subaru Forester Electrical System

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 but in order to replace the DCM to the 4G it will cost upwards of $2000.

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. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Starlink screen has failed - the screen will either only show the initial agreement screen and freeze or it will freeze with the back up camera activated. I can’t access Bluetooth capabilities, camera function, etc

I purchased the car CPO June 2021 Battery replaced December 2022 Battery replaced January 2023 Between these replacements, car was consistently dying/would not start, required frequent jumps. Left me stranded numerous times. Each time the car was serviced (at different dealer locations), no mention was made of known issues with batteries being drained. This issue was known by Subaru, as evidenced by class action suits filed and won. At this time, the car engine is dead and will not respond to a jump. This has cost me thousands in car rentals/ride shares.

We keep replacing batteries and they keep failing. We wonder if this is related to the class action lawsuit concerning the CAN bus system.

Purchased NEW , after 5 years battery died ..OK time for a replacement, Les Schwab installed a New Higher Capacity battery. 3 weeks later dead Battery, had it jumbled, Les Schwab replaced new battery. 4-5 weeks later DEAD battery. Made appointment with Dealership (Lithia Subaru) 3-17-2023 in Reno Nv. A hour + away. I waited a few hours for their service department to check out the charging/battery issues. Came back said NOTHING WRONG, need to drive it more ! Drove it a couple days ago , this morning DEAD Battery AGAIN ! I’m almost 70 / Disabled and live in a very Rural mountainous area and need a dependable vehicle… especially in the SNOW. HELP Please!

I have had multiple instances where I am unable to remove the key from the ignition switch when the vehicle is in Park. Subaru's technical bulletin 16-112-18R states this is caused by contamination of the Park-Range switch internal components. I'm concerned I will be unable to remove the key and will have to leave the vehicle unlocked with the key in the ignition. I am also concerned I'll be stranded somewhere the next time this happens. I found information online that states Subaru dealers are charging $500 to $800 to repair this issue, which should be a recall or extended warranty situation and not a cost to the vehicle owner.

This is the third time my car has completely drained my battery. I have replaced the battery twice since I purchased it in 2018. I drove it less than 24 hrs ago and it’s completely dead off a 8 month old battery. Nothing was left on any of the times it has died.

Battery has drained drastically twice to the point of the car dying while just waiting for some takeout

My car is a 2018 with only 28100 miles on it. I have now had to replace the battery three times. Subaru tells me I need to drive it every two days in order to keep it from discharging the battery. This is unacceptable. Clearly there is a parasitic drain. My issue is very common, and affects many late model subarus. I have already been stranded several times by this issue.

new battery that is only 14 months since installation (at subaru dealer) and 5,000 miles on the car is flat. I did not use my car for about 1 1/2 weeks in the garage and it is totally flat. This is not normal and my friend with an outback has similar problems so I think my issue is not unique.

Battery continues to drain when car is parked/off causing a required jump start and then recharging of the battery. Dealer replaced battery one time in 2019 (with expense to owner) and recommended driving car every couple of days to ensure it does not draw down. This is not normal. Battery continues to drain down. Owner purchased aftermarket AGM battery (May 2021) of higher voltage/capacity to attempt to reduce number of issues yet vehicle continues to exhibit parasitic drain and battery dies after 3-4 days (faster when it's cold). Dealer has looked at car two more times and claims this is normal and need to not leave car for multiple days without starting. There are multiple class action lawsuits claiming this issue so I am registering this VIN as an affected vehicle.

Just had my battery replaced and it’s already dead.

The battery drains quickly when the car is switched off, potentially causing the driver to be stranded in dangerous situations without a functional car.

We have discovered that our 2019 Forester has a parasitic battery drain of almost 1 amp when the car is off and the hatchback is open. This resulted in full battery drain several times until we did several tests to determine the root cause of the problem (Subaru was of no help). This led to replacement of the OEM battery at about 52,000 miles.

Car battery died within 4 months of purchasing, had to purchase a replacement

The contact owns a 2018 Subaru Forester. The contact stated that since owning the vehicle, the battery had been replaced three times. On each occasion, the contact stated that the vehicle failed to start up after multiple attempts. There was no warning light illuminated. The dealer had been notified of the failure and informed her that there were no recalls on the vehicle. The manufacturer had yet to be notified of the failure. The vehicle had yet to be diagnosed or repaired. The failure mileage was unknown.

Twice now the battery has died without any obvious reason. We did not leave the lights on nor any other electrical devices known to us. We had to cal AAA who could not find an issue for the drained battery.

Repeatedly I have not been able to remove the key from the ignition. It appears as though the car is not sensing that the gear is in Park. It has taken me up to 10 minutes of turning the ignition on and off and putting the car in reverse and forward to be able to remove the key from the ignition. This has been happening for 3 weeks now, on a daily basis.

Battery, electrical system was doing funny things I noticed then a day or two later my wife and daughter got stranded at a gas station and I had to go jump the car to get them home in the middle of the night we called the dealership a few times and they said that all battery's die they just said to go buy a new battery no warning light nothing

Multiple episodes of car not starting, most similar to dead battery scenario. These incidents have occurred after car was parked in my driveway for 24-48hours. However, AAA responded on three separate occasions and tested battery which always was “green” or “good” and alternator was also “fine, not a problem”. On fourth occasion, I went ahead and replaced battery as recent Subaru scheduled service at a Subaru dealer yielded “no problems” on electrical survey when I told them of these incidents. Now, one month after having purchased a completely new battery, my car again will not start and AAA says battery is “good” and alternator is also fine.

1. The car battery failed on six separate occasions within a 12 month time frame. First on May 8, 2021, August 21, 2021, September 9, 2021, November 5, 2021, February 5, 2022, and on March 28, 2022 2. The drivers safety was placed at minimal risk on one occasion since cars were lined up behind in a parking lot when the car would not start. 3. Yes, the problem has been reproduced due to the number of different times the battery died and the car would not start. The problem has not been confirmed by a dealer or independent service center. 4. No, to date the vehicle or component has not been inspected by the manufacturer, police, insurance representatives or others. 5. No, there were not any warning lamps, messages, or other symptoms of the problem prior to failure. They first appeared on May 8, 2021.

The battery went dead on Jan 14th 2022. This isn't totally unexpected as this was the first time the battery needed replacing since the car was purchased new. However, after the battery was replaced the same day, three days later Jan 17th the battery was again dead. Since then, the battery has been replaced once more and again died on both March 27th and April 1st. The car is driven weekly at least and has no warning lights on. After the most recent incident it was researched more heavily and found that there is a potential class action lawsuit against Subaru for this exact problem. Though it hasn't been dangerous for us it could be potentially dangerous should the car decided to fully shut off in the middle of traffic.

I'm filing a complaint regarding a battery drain issue in the 2018 Forester Limited. After sitting idle and not being started for 1.5-2 weeks the battery is fully drained. Fully drained is defined as the car won't start with a portable jumper. The power source car needs to be running and connected to the battery of the dead Forester for upwards of 20mins to give it a partial charge prior to the battery dead Forester being able to start. I've been told various reasons from various dealers and cannot get a straight answer. [A] one subaru dealersip said it's normal to have a dead battery in 3days. [B] another subaru dealership said it was because I had a bad battery, but after replacing it the issue still persisted. I have made sure to manually shut off all lights including making sure the running lights are in the off position, not the automatic on/off position. This incident has occurred multiple times when traveling for week at a time and upon returning to the car to try and start it and it won't start. The same dealership [B] claimed that the parasitic draw was because I kept a cigarette lighter car charging adapter plugged in even though the car was off. I have read several other complaints about this issue regarding this car and hope there can be a recall/legal claim filed against subaru for this issue so they resolve it.

Bought vehicle June 2021. Battery failed multiple times. Sometimes it will start with a jump, but on 12/2/21 it was completely dead and required tow to Michael's Subaru dealer in Bellevue, WA. Battery was replaced twice within 6 week period.