2018 Subaru Legacy engine problems

Filed Oct 20, 2025 · Brakes, Engine · FL · crash

My wife experienced an unintended acceleration in her 2018 Subaru Legacy. My wife had begun to slowly back out of a parking space in a school parking lot when her 2018 Legacy went into an unintended rapid acceleration in reverse. The car took off in reverse and did not respond to her applying the brakes. Somehow she managed to steer the car which was rapidly acceleration in reverse, virtually uncontrollable, and guide the car down a row of parked cars until she clipped the front of another car at the end of the row and her car came to a stop. Thank God there were no students in the parking lot at the time! The floor mats in our Legacy are Subaru mats that lie flat and in no way would affect the accelerator pedal. As the car was accelerating in reverse, and she had removed her foot from the accelerator onto the brake, the brakes did not slow the car. There is considerable damage to the right rear of the car and trunk. After the accident, when the car was restarted, the accelerator and brakes worked fine and she was able to drive it home from the scene. Thank god students were not in the parking lot! [XXX] [XXX] (cell) [XXX] Nashua, NH 03062 (May-Oct), Ponte Vedra, FL (Nov-April) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 3, 2025 · Engine · WA

For context, we are the original owners of the 2018 Subaru Legacy car (leased in 2018, and then purchased outright in 2022). At the time of the incident, the car was in pristine condition. We had the oil changed in accordance with the maintenance agreement during the lease, and then every 6,000 miles or whenever the dealership called us to bring in the car. The car had 39,000 miles on it at the time of the incident and had an oil change as recently as 2.5 months prior. While stopped in traffic, the car began making a sputtering noise and all the lights on the dashboard turned on at the same time. When pushing on the gas the car began rolling down the hill towards the car behind me. I put the car into park and then turned it off, and then waved traffic to pass me. After reinserting the key into the ignition, the car began to make the sputtering noise again, but I was able to move the car very slowly onto the shoulder of the road. The greatest danger is that this occurred in moving traffic. Thankfully, there was no harm done to me or anyone else. I had the car towed to the nearest auto mechanic shop. Initially, the shop informed me it was an issue with the spark plug, but upon further investigation, they told me the problem was with the engine and asked me to bring it to the dealership. The dealership is unsure of the exact issue, but stated that it was engine failure (more details in screenshots below). The technician has stated that we will need to completely rebuild the engine to fully identify and fix the problem.

Filed Nov 3, 2023 · Engine, Fuel system · NJ

I have a 2018 Subaru Legacy 2.5. The front catalytic converter failed April 2022 with 130k miles. the part was replace by Subaru and the part has failed again. Oct 2023 with 180k miles. Exhaust fumes enter the passenger compartment (which are Carbon Monoxide). The same part has failed two times in a short period of time. Subaru states this is not a warranty issue .This must become a recall.

Filed Aug 31, 2023 · Engine, Fuel system · CA · crash

A friend was trying to move the car from the street when it suddenly lurched and accelerated and hit a tree, and boulder, and another car. They had not stepped on the accelerator yet. She lost control of the car. It was totaled as per State Farm.

Filed Jul 20, 2023 · Engine · 50,000 miles · MA · crash

The contact owns a 2018 Subaru Legacy. The contact stated while stopped at a traffic light with her foot lightly depressing the brake pedal, the vehicle independently accelerated and crashed into the rear bumper of a vehicle stopped in front of her. The contact stated no warning light was illuminated. The contact stated that her front bumper, radiator, and part of the frame that supports the bumper had been damaged and needed to be replaced. The radiator had been damaged and leaked out all the coolant. There was only minor damage to a trailer hitch on the rear bumper on the vehicle the contact crashed into. The other vehicle was able to drive away from the scene of the crash and the contact drove her vehicle to a nearby repair shop. The police were not involved. The manufacturer had not been informed of the failure. The failure mileage was approximately 50,000.

Filed Feb 17, 2021 · Engine · 18,000 miles · WV

Tl* the contact owns a 2018 subaru legacy. The contact stated that the vehicle consumed an excessive amount of oil while driving. The engine oil warning light was illuminated. The contact had taken the vehicle to budd baer subaru (71 murtland ave, washington, pa 15301) and subaru of moon township (5450 university blvd, moon twp, pa 15108) and was informed that similar vehicles were known to consume excessive amounts of oil. The vehicle was not repaired after multiple visits and performance tests. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was 18,000.

Filed Sep 22, 2020 · Electrical, Engine · 29,000 miles · MI

P014a error code. Started car and was about 1/8 mile away from home driving at 40 MPH on country road, and all the lights came on the dash (check engine, eyesight off warning light, battery, oil, etc...). Immediately turned around and went home. My obdii scanner said p014a error. I reset the code. Called dealer to see if it was safe to drive and drop off (30 miles away) and they said yes. They then said if they cannot read the code they cannot do anything about it (because I reset it and it is not historically saved in the car). The code happed aug 17, 2020 has not appear again as of sept 22, 2020. I don't know if they are related, but I have been having very strange problems with the radio volume since then. I've rotated the heat dial and it's turned the radio volume up / down, started the car and the volume is at maximum (after quickly turned the volume to zero, turned it to one is accpetable and 2 is way too loud).

Filed Dec 31, 2019 · Engine, Transmission · 44,768 miles · DE

While stopped at a red light as soon as the light turned green I proceeded to accelerate and heard a rattle and then a loud boom explosion sound. My torque converter, engine, and flexplate exploded causing it in operable and placed me in an unsafe location stranded on the roadway. Subaru of america has now had the car since thanksgiving this a major safety problem,I still don't have my car.

Filed May 19, 2019 · Electrical, Engine · 18,125 miles · WV

While exiting off highway, the can unexpectedly shut off nearly causing a wreck. Car would not restart. The entertainment screen remained working the entire time. The instrument cluster went black and remained this way. Automatic windows, entertainment screen, radio all worked but car would not start. A similar issue had happened two weeks ago but we were not driving... The car would not start and a master subaru tech looked at car and they said nothing was wrong with it.. Obviously they were wrong. Very disappointed in subaru. This is a very dangerous issue.

Filed Jan 15, 2019 · Electrical, Engine · 15,365 miles · IL

On the dashboard showed that the remain mileage was 70, but it stopped all the sudden due to no gas. I almost caused an accident because the car stopped on a public street with heavy traffic. After many times trying to start the car, it did not work; it was completely dead. I had to leave the car stranded to go and get gas to the nearest gas station.