2018 Subaru Forester Electrical Problems

I brought my vehicle to an authorized Subaru dealership (Byers Imports, LLC in Columbus, Ohio) to diagnose the reason for the airbag warning lamp illuminating. The dealer had the manufacturer's WUM-98 Safety Recall (NHTSA Campaign Number 19V701000) performed to remedy a defective Occupant Detection System (ODS) sensor harness.Despite the recall remedy being completed, the Supplemental Restraint System (SRS) airbag warning light re-illuminated on the dashboard, completely disabling the front passenger-side airbag.The dealership confirmed that the passenger-side airbag remains completely disabled and inoperable due to a hardware failure of the internal occupant detection sensor mat. Because the initial WUM-98 recall was previously marked as "closed" in Subaru's automated system, the manufacturer refused to cover the repair under the recall. I was forced to pay $1,258.34 out of pocket up front to order a replacement front passenger seat cushion assembly (Part #64139SG061LL) to restore basic airbag safety to the vehicle.The initial federal safety recall remedy failed to permanently correct the underlying safety hazard. The vehicle continues to exhibit the exact same life-threatening defect (disabled passenger airbag) targeted by the original recall, and the manufacturer is shifting the financial burden of this failed remedy onto the consumer.

NHTSA ID

11751355

Incident

Jul 17, 2026

June 2025: I proactively replaced the battery October 2025: Left the car parked for 17 days. Dead battery. Got a jump, drove for 2 hours. May 2026: Left the car parked for 10 days. Dead battery. Got a jump, drove to mechanic who replaced it under warranty. Saw article about Subaru class action lawsuit about this issue, so I'm reporting it. I will visit the Subaru dealer where I purchased to car and ask them about it and Subaru's plans for permanent repair.

NHTSA ID

11737089

Incident

May 8, 2026

Airbag light comes on due to some failure in the passenger seat. This vehicle year has had a recall on the same issue but this VIN number was not included for some reason. Another consumer posted his assessment which I have attached. My vehicle falls under his category. He has sold his since his was never resolved.

NHTSA ID

11724224

Incident

Sep 1, 2025

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.

NHTSA ID

11715383

Incident

Jun 1, 2025

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)

NHTSA ID

11696973

Incident

Nov 1, 2025

Yesterday 6/19/25 I was driving out the driveway when the vehicle accelerated on its own, and not slowly, but like it had been punched. I was actually coasting at the time since I didn't want to stir up dust. My foot was not on the gas pedal. And it was not the floor mat. It happened on its own, the first time in 87,000 miles. It probably cannot easily be replicated as it was completely random, although now that it's happened once, it very well could happen again if there's a faulty or aging part or sensor. Neither the local dealer nor Subaru has acknowledged the problem (I called both today) but it's a SERIOUS safety issue. No check engine light or other means of warning. It just happened out of nowhere. Glad I was in the driveway and not in town waiting while a pedestrian was crossing the street.

NHTSA ID

11668212

Incident

Jun 19, 2025

I’ve experienced recurrent failures with my Subaru’s AC system, and it’s become more than just an inconvenience—it’s a real safety concern. In hot weather, the cabin can become unbearably warm, making it difficult to concentrate and increasing the risk of fatigue or even heat-related illness, especially for passengers who are older, very young, or have medical conditions. What’s even more frustrating is the poor quality of the system and Subaru’s lack of communication about what appears to be a known defect. Despite numerous complaints from other owners and repeated service visits, there’s been no clear explanation or long-term fix offered. The situation is not only uncomfortable—it’s unsafe, and the lack of transparency and accountability from Subaru has been incredibly disappointing.

NHTSA ID

11654131

Incident

Mar 25, 2025

Blind Spot Detection goes on an off. Safety is impacted by the system going on and off. Took care to Subaru dealership

NHTSA ID

11627979

Incident

Jul 18, 2024

I bought the car certified used from a Grand Prix Subaru in Hicksville, NY. They did not mention this issue. I’ve had the car for 2 years, drive it 1-2x a week, have it serviced regularly, etc. all of a sudden in the past week it’s needed a jump 2x, maybe a few days apart. My lights are on auto, always, & shut off when the car turns off after a few seconds. My interior lights are all set to off, after the first jump. Doors & cargo door are all closed well. Battery has been tested & they say it’s not bad & doesn’t need replacing. So what is draining the battery then? When the battery is dead, it’s completely dead. No turnover at all & the cargo door won’t open until it’s running & charged enough again. I’m shocked the cargo door can’t open without the battery!

NHTSA ID

11609276

Incident

Aug 18, 2024

My 2018 Subaru Forester has a faulty passenger air bag sensor, which has been diagnosed by my local Subaru dealer, with a repair cost of $1,500+ for labor and parts. It has intermittently turned on and off again, but after getting a separate issue fixed by my dealer, they diagnosed this problem, and every time the car is turned on, the warning light is constantly displayed, and the passenger seat airbag light shows "OFF" even when someone is in the passenger seat. Upon research, this is a known and common issue with other Subaru Foresters with heated seats in the same model year (my Forester does have heated seats), but my VIN is not included in the Subaru recall for this specific repair. This greatly puts the passenger in my car at risk, as the sensor does not recognize that a person is in the seat while they are riding, and if we were to be in an accident, their airbag would not deploy. I am frustrated that this is a known, common safety issue that affects my model and year of car, but my VIN is not included on the recall list. I would expect that my car should also be included in the recall and fixed by the dealer at their expense as it is clearly documented many times on other 2018 Subaru Foresters.

NHTSA ID

11607542

Incident

Aug 9, 2024

Starting up the car in the morning after a long day stuck in traffic (over 100 degree F weather), moved about 5 feet then the eyesight system stopped working, rear braking stopped, and power steering gave out - the car started and the engine ran normally. The car was abandoned as unsafe until diagnostics could be performed and a different car was used to get around . That evening the car started up fine, also the next morning to reproduce conditions. Tested the battery, which showed "good" (93% charge/40%healthy). I suspect that, in the morning the A/C, headlights, radio, backup lights, etc... put a large draw on the electrical system resulting in a system wide shutdown of adaptive features - However loss of power steering is insane and can easily result in death if it happens while driving especially while making a turn if the driver is not prepared/strong enough to force it. The linking of non-critical system to help the driver to an essential system is just asking for trouble.

NHTSA ID

11599518

Incident

Jul 5, 2024

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

NHTSA ID

11549317

Incident

Sep 24, 2023

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.

NHTSA ID

11547249

Incident

Dec 12, 2022

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.

NHTSA ID

11542747

Incident

Sep 1, 2023

I'm unsure why this 2018 Forester wasn't one of the many manufactured that year recalled for an intermittent passenger seat air bag sensor malfunction since the focus of that recall remains the problem with this particular Forester: it has heated seats and displays an intermittent on/off passenger seat air bag light while a passenger is seated in that seat. The malfunction has been occurring for the past several years, however, our attempts to document and diagnose it have occurred much more recently. We took it to a dealership on 5/9/23; despite keeping it overnight and making numerous attempts to duplicate the problem (at a cost to us of $142) they were unable to do so. However, on 6/27/23, as I drove my wife a distance of approximately 150 miles and she sat in the front passenger seat, the airbag light displayed “off” almost the entire trip. Also, she and our son traveled about 400 miles between 16-19 June; he drove, she sat “front right”. During that trip the sensor light showed intermittently on and off and my wife was able to take time and date stamped photos of the sensor light from her point of view in the passenger seat; both when it was on and when it was off. I reported "all of the above" to the dealership and received a reply referring me to the "apparent" minimum weight limit needed for a passenger to trigger the sensor (100 lbs; I've seen 75), together with the explanation that "electronics" could interfere with operation of that sensor. Although my wife at times weighs just under 100 lbs, that weight limit doesn't explain why the sensor light is INTERMITTENTLY on and off on the same trip. At the very least, since she's now always concerned about failure of the airbag to inflate in the event of an accident, a recall/replacement/addition to the previously issued recall applicable to the exact same malfunction should be required. Based on dealership response, it will take an order from you before any additional repairs/replacements are made.

NHTSA ID

11533577

Incident

Jan 4, 2022

My 2018 Subaru Forester should be included in a recall and subaru is denying that this recall exists. My SRS air bag light is on. The dealership wants to charge $1216.73 to replace the passenger side seat occupant detection sensor mat Information from https://www.nhtsa.gov/vehicle/2018/SUBARU/FORESTER/SUV/AWD#recalls October 3, 2019 NHTSA CAMPAIGN NUMBER: 19V701000 Occupant Detection System May Deactivate Airbag If the connection loosens, the front passenger airbag may deactivate even though the seat is occupied, increasing the risk of injury to the front passenger in the event of a crash. NHTSA Campaign Number: 19V701000 Manufacturer Subaru of America, Inc. Components AIR BAGS Potential Number of Units Affected 366,282 Summary Subaru of America, Inc. (Subaru) is recalling certain 2015-2018 Forester vehicles equipped with heated seats. An electrical connection in the front passenger seat for the Occupant Detection System (ODS) may loosen. Remedy Subaru will notify owners, and dealers will inspect and, as necessary, replace the ODS sensor mat harness, free of charge. The recall began February 11, 2020. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WUM-98.

NHTSA ID

11525478

Incident

May 29, 2023

My srs airbag system has just started going on and off. What I read is there is recall for this. 2018 with heated seats caused by faulty wiring. Yet when I put in my vin shows no recalls. Filed complaint with Subaru they stated basically go get it fixed and will notify you if there is a recall.

NHTSA ID

11521148

Incident

Apr 26, 2023

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!

NHTSA ID

11520767

Incident

Feb 20, 2023

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.

NHTSA ID

11518550

Incident

Apr 23, 2023

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

NHTSA ID

11512587

Incident

Mar 18, 2023

The contact owns a 2018 Subaru Forester. The contact stated that she was unable to start the vehicle. The contact stated that the power steering warning light was illuminated. The contact stated that after 5 minutes she was able to start the vehicle and to drive to her destination. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was 77,978.

NHTSA ID

11506177

Incident

Feb 8, 2023

Mileage

77,978 mi

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.

NHTSA ID

11505156

Incident

Jan 24, 2023

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

NHTSA ID

11500758

Incident

Jan 9, 2023

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.

NHTSA ID

11498890

Incident

Dec 26, 2022

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

NHTSA ID

11489277

Incident

Oct 14, 2022