2018 Subaru Forester electrical problems

Filed Sep 17, 2026 · Electrical, Engine · TX

On July 31, 2026, I was driving with my daughter when the a/c compressor clutch seized up and experienced a catastrophic compressor failure that also blew out the expansion valve o-rings. The failure led to a total loss of engine power and control of the vehicle. The car would not start back up because the clutch was seized and the pulleys wouldn’t turn. Luckily, I was in a residential neighborhood and cars were able to safely go around me. If this had happened on a highway or faster speed limit zone there could have been fatalities. There were tons of lights all over the dash as I attempted to restart the engine. The engine wouldn’t turn over until I gave it plenty of pedal pressure. This extra power to the engine during ignition freed the seized clutch and I was able to drive home without air conditioning. I parked outside in the driveway due to a strong odor of burning metal (probably clutch) when we arrived home. Several years earlier I had completed a Subaru recall WRB-21 for the condenser, and I believe this is directly related to the failure. Subaru of America denied my request for goodwill repair claim under claim 260810-210789 and won’t recognize this as a serious safety issue. There are hundreds of thousands of views on YouTube videos of complaints that the a/c compressor fails prematurely and SOA has only acknowledged the condenser failure. My vehicle has less than 70,000 miles and it has been verified by the dealership (North Park Subaru Dominion) as a “faulty” compressor and leaking expansion valve o-rings. I have requested the dealership to use tracer dye and ensure that metal shavings and debris are not in the closed loop system before replacing the a/c compressor and o-rings which will cause another failure of the entire system. I will also request that they save the compressor for inspection.

Filed Aug 18, 2026 · Airbags, Electrical · NC

Airbag light came on - dealership confirmed it is an occupant detection system failure - wiring harness has gone bad. No history of moisture exposure, which would leave faulty part as the problem. Similar to Subaru recall from 2020 on heated passenger seats - this vehicle was not included in that recall, but is in the same year range and has heated seats. Entire bottom piece of front seat must be replaced, including wiring harness and seat mounting bracket; otherwise air bags may not deploy in case of accident. Quick online search reveals this problem has been prevalent in other 2018 Foresters not included in the original recall.

Filed Jul 19, 2026 · Airbags, Electrical · OH

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 (the federal safety agency 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.

Filed May 11, 2026 · Electrical · CA

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.

Filed Mar 13, 2026 · Airbags, Electrical · CA

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.

Filed Feb 3, 2026 · Electrical · WA

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.

Filed Nov 1, 2025 · Electrical · ID

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)

Filed Jun 20, 2025 · Electrical, Engine · MT

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.

Filed Apr 11, 2025 · Electrical · DC

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.

Filed Nov 29, 2024 · Driver assistance, Electrical · CO

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