Subaru Legacy transmission failure problems

Filed Mar 10, 2026 · Transmission · MA

2015 Subaru Legacy 2.5i, approximately 48,000 miles. CVT transmission failed suddenly with no prior warning signs. Vehicle was exclusively dealer-serviced for its entire life. While driving, the transmission began shuddering, slipping, and making metallic grinding noises. Vehicle could barely climb a small ramp and was locked in limp mode, making it unsafe to operate in traffic. Diagnostic codes P0841, P0700, and C1431 were stored. Authorized Subaru dealer confirmed the failure. Technician stated the valve body likely failed first — a known defect per Subaru TSB 16-107-17R — which then caused the CVT chain to slip. Dealer quoted $11,000 for a remanufactured CVT replacement. Service representative stated she had never seen a transmission need replacement at such low mileage. No warning lamps or symptoms existed prior to sudden onset. CVT fluid was never changed, consistent with the manufacturer's U.S. maintenance schedule. This vehicle falls under Subaru's CVT Warranty Extension covering 2010-2015 Legacy models due to known defects. Vehicle is well under the 100,000-mile limit but approximately 13 months past the 10-year time limit. I opened a case with Subaru of America Customer Advocacy. My dealer informed me that Subaru Corporate contacted them and communicated a decision regarding my case, but Subaru has never communicated any decision to me directly. Multiple emails, a voicemail, and a request for escalation have gone unanswered over several days. This failure poses a safety risk as the transmission can fail suddenly and without warning while in motion, potentially with passengers including children.

Filed Jul 21, 2025 · Transmission · PA

CVT Transmission Failure. Failure occurred at approximately 66,706 miles on 5/16/25. The Check Engine and AT Temp lights appeared in the instrument cluster. The driving conditions when this happened were a safety concern. First, the vehicle would crawl, shutter, and almost stall with high RPMs when attempting to climb a hill. Second, on a level surface at any given time the vehicle would not respond then lunge forward unexpectedly. The vehicle was inspected by a Subaru Dealership and the diagnosis was "Internal failure of transmission". The transmission needs to be replaced. The same driving conditions and error codes were experienced by an AAMCO Transmission repair facility. The diagnosis was codes P0843 and P0867 present prompting the transmission to be replaced. This repair was completed on 6/4/25. The failed transmission is no longer available.

Filed Sep 8, 2023 · Transmission · PA

There was a recall for my 2016 Subaru Legacy transmission issue (CVT), I got a letter from Subaru on 9/23/2018 which extended warranty for 2016-2017 Legacy/Outback CVT from 5 years/60000 miles to 10 years/100000 miles, started from 9/30/2019. The transmission of my Subaru started making noise half year ago which was still under warranty, at that time I didn't think it was a big deal and totally forgot the letter from Subaru, however, the noise is aloud and unbearable now, the mileages of my car is about 5000 miles exceeding 100000 miles warranty, which I need to pay $8200 to replace transmission per Subaru client service USA. After browsing online, I have noticed that the issue of CVT on Subaru Legacy is common, in this case, Subaru should replace such defective CVT for free, at least for the part.

Filed Aug 21, 2023 · Transmission · 69,738 miles · MO

The contact owns a 2020 Subaru Legacy. The contact stated while driving at an undisclosed speed, the contact stated that several unknown warning lights illuminated, and the gear shifter was inoperable. The contact stated that the transmission failed to shift as needed. The vehicle was towed to the dealer but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 69,738.

Filed Dec 14, 2022 · Transmission · NJ

I had a transmission failure on my 2016 Subaru Legacy and there were no warning signs before this incident occurred. I was on a road trip driving at highway speeds and suddenly without warning I heard a loud bang. Then the "at oil temp" light came on, then the "check engine light", smelled something burning and also felt some slipping in the transmission. I pulled over as soon as I could. I towed it to the nearest dealer and they diagnosed the problem as being a bad valve body based on the code "P0712: Transmission Temperature Sensor Circuit Low" without test driving the vehicle. The valve body was replaced. Since my car's mileage was outside the extended warranty for this issue, Subaru only contributed half the cost of the repair. After the completion of the repair, the dealer told me they heard loud transmission noises and they recommended that my transmission may have to be replaced I test drove the vehicle with the service manager, except for the noise, the car had no warning lights and the car was shifting smoothly and was reassured that the car would not stall. After leaving the dealership, I drove 25 miles before the car started jerking and violently shaking. Then at a stop light on a highway, the car stalled. When I press the accelerator, the engine would rev but the car would not move. The vehicle was towed home, my car still would not move when I pressed the accelerator and the check engine light came on. I towed it to my local dealer, they checked the vehicle and said the transmission had an internal failure and replaced the transmission. The bad transmission was sent back to Subaru per their policy. Subaru did a goodwill warranty repair that covered a significant portion of the cost. This sudden transmission failure was a huge safety risk to myself and others. I could have rear-ended both times my car stalled.

Filed Aug 19, 2022 · Transmission · 145,000 miles · ID

The contact owns a 2012 Subaru Legacy. The contact stated while driving 35 MPH and coming to a stop, the vehicle shuddered and shut off. There was no warning light illuminated. The contact was able to restart the vehicle and continued driving. The contact’s husband, an independent mechanic, replaced the spark plugs, ignition coils, and fuel filter; however, the failure reoccurred several times while driving. Upon investigation, the contact became aware of Subaru Technical Service Bulletin Number: 16-90-13R for transmission failure. An unknown dealer and the manufacturer were notified of the failure and informed the contact that the vehicle was not eligible for the Technical Service Bulletin repair due to the mileage. The vehicle was not diagnosed or repaired. The failure mileage was approximately 145,000.

Filed Jun 28, 2022 · Engine · PA

Transmission failed. Began to make bad noises then failed to accelerate in an intersection. Was almost hit by another car. Dealer indicated that the Subaru transmissions were only lasting 90, 000 to 100,000 miles before requiring replacement. Contracted Subaru who said they had a voluntary fix, but we were not notified and were outside of the short time frame for the fix. We replaced transmission at cost of $10,000. Subaru offered 1000 off a new car but was not concerned about the safety issue and would not fix/replace the transmission for this known issue.

Filed Mar 9, 2021 · Transmission · 140,000 miles · WI

Tl* the contact owns a 2011 subaru legacy. The contact stated that while driving at various speeds, the transmission failed to properly downshift causing the vehicle to stall. During the failure, the power steering and power brakes also become inoperable. The vehicle was taken to an independent mechanic who diagnosed that the power train torque converter was faulty and needed to be replaced. The vehicle was not yet repaired. The local dealer subaru city of milwaukee located at 4640 s 27th st, milwaukee, wi 53221 and the manufacturer were notified of the failure. The failure mileage was 140,000.*dt consumer stated his daughter [xxx] is the owner of the vehicle.

Filed Sep 25, 2019 · Transmission · 100,128 miles · CO

Tl* the contact owns a 2013 subaru legacy. The contact took the vehicle to be serviced at heuberger subaru (1080 motor city dr, colorado springs, co 80905, 719‑475‑1920) for transmission failure. Initially, the dealer would not cover the cost of the repair due to the warranty expiring; however, the manufacturer was notified and ultimately agreed to service the vehicle under warranty. Since then, the vehicle remained in the possession of the dealer for nearly two months. The dealer informed the contact that the ecu unit and gear shifter were defective and needed to be replaced. The dealer stated that the repair would cost $1,900. The contact associated the failure with the federal safety agency campaign number: 19v297000 (electrical system). The manufacturer was contacted and stated that the VIN was not included in the recall. No further assistance was offered. The vehicle was not repaired. The failure mileage was 100,128.

Filed Aug 15, 2019 · Engine, Transmission · 167,000 miles · OH

The car is just shy of 8 years old. The transmission failed causing the car to suddenly stop, shut off and lose power steering while traveling down the road. Currently the engine is leaking exhaust from the engine compartment that can be smelled in the passenger compartment. It is also leaking hot oil from the cylinder head onto the lower exhaust and leaking hot coolant from the radiator. The exhaust and fluid leaks occur when stationary or in motion.