Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2018 Subaru Forester owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2018 Subaru Forester. The contact stated that while attempting to start the vehicle, the vehicle failed to start-up. The vehicle was towed to the local dealer who diagnosed that rodents had eaten through the engine wiring harness. The contact was informed that the wiring harness was made of a soy-based material that was attractive to rodents. The vehicle was not yet repaired. The contact indicated that 2 weeks prior the windshield wiper fluid spray mechanism was inoperable due to a similar failure with rodents eating the soy-based tubing. The manufacturer was not yet notified. The VIN was not available. The failure mileage was 27,000.
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.
Purchased this certified pre-owned, with warranty on 4/30/21. Required jumpstarts for dead battery five + times over the first 4 months, in moderate weather. Dealership confirmed that a new battery was installed at the time of my purchase. The vehicle has been towed to the dealership several times, they can find no issues. They then replaced the battery on 8/4/21 as the 3-month old battery failed testing per fail code JRGKF50-328J0D1. The car required a jump start on 11/21, again on 11/26, and I am currently waiting (12/2/21) for Subaru Roadside assistance, for yet another jump start. The car was last driven (commute home from work) yesterday. External temperatures have not been overly cold - yet. It should be noted that I turn off the radio and heat/air before shutting off the ignition. …
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 is the latest time in a series of incidents where the SUV would not start due to a problem with the main battery. New batteries drain very quickly after a series of electrical problems. So far, we have noticed keyless entry FOB says battery in the FOB is low and stops connecting (but then connects if we remove the key from it without us holding it to the button that turns the car on and off), we replace this battery but continue to have the same issues, front passenger side window is not able to be rolled down or up from driver side, as the battery continues to drain, gas gauges stop correctly registering amount of gas in the car, different warning lights light up on control panel without any sense of rhyme or reason, and overhead lighting gets dim. …
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. …
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. …
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. …
Environmental and safety issue. The AC System has failed three times now. SUBARU dealer checked the system for leaks at in November 2021 (mileage about 22,000 miles) and could not locate any leak but added freon. AC System stopped working again in August 2022 at 24,000 miles. Mechanic checked system, found a loose connector and tightened it, then recharged Freon in system. After 4 days, system again is not cooling the car. Compressor and blower work but no cold air and return line from compressor is not cool. This problem is widespread across Subaru Forrester models 2017 & 2018. Checking for leaks and adding freon costs $200. Most likely a repair of the system will cost at around $1,500 - 3,000. For a less than 4-year-old, very well-maintained, garaged and little driven car, components should not be failing. …
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. …
Electrical complaints in other Forester years
Frequently asked questions
How common are electrical problems on the 2018 Subaru Forester?
NHTSA has 71 complaints about the electrical system of the 2018 Subaru Forester, 14% of the model year's 498 complaints. The component named most often is 12v/24v/48v battery (1 mentions).
Is there a recall for 2018 Subaru Forester electrical problems?
No. NHTSA lists no electrical system recall for the 2018 Subaru Forester, though it has 3 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2018 Subaru Forester electrical problems start?
Half of the complaints with a recorded mileage happened before about 12,000 miles, and 56% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.