Most common 2018 Subaru Legacy problems
Share of the 117 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Subaru Legacy complaints by model year
Best Legacy years: 2023, 2025, 2021. Years to avoid: 2015, 2016, 2011, 2020, 2019. Compare all years →
2018 Subaru Legacy recalls (3)
Fuel system, gasoline › Delivery › Fuel pump
Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2018 Forester, 2018-2020 Impreza, Legacy, Outback, 2018-2019 BRZ, WRX, and Toyota 86 vehicles. The low-pressure fuel pump inside the fuel tank may fail.
Remedy: Dealers will replace the low-pressure fuel pump, free of charge. Owner notification letters were mailed September 24, 2021. Subaru and Toyota owners may call customer service at 1-844-373-6614.
Visibility › Rearview mirrors/devices
Subaru of America, Inc. (Subaru) is recalling certain 2018 Legacy, Outback, and BRZ vehicles. In the affected vehicles, a software issue may cause the audio display system to not initialize, resulting in the camera display remaining blank. If this occurs, the rearview image will not display while backing up the vehicle.
Remedy: Subaru has notified owners, and dealers will reprogram the audio system display software, free of charge. The recall began on February 5, 2019. Owners may contact Subaru customer service at 1-844-373-6614.
Electrical system › Software
Subaru of America, Inc. (Subaru) is recalling certain 2018 Subaru Legacy and Outback vehicles. Due to a software error, the low fuel warning light may not illuminate at the intended remaining fuel level and the miles-to-empty display may incorrectly indicate a positive number despite the tank being empty.
Remedy: Subaru will notify owners, and dealers will reprogram the combination meter software, free of charge. The recall began February 20, 2019. Owners may contact Subaru customer service at 1-844-373-6614.
What 2018 Subaru Legacy owners say
Electrical system all 40 →
The contact owns a 2018 Subaru Legacy. The contact stated that after starting the vehicle, the headlights failed to illuminate, and the rearview camera was intermittently flashing and displaying a blank image. The contact stated that on various occasions when the vehicle was parked, the parking brake failed to activate as needed. No warning lights were illuminated. The vehicle was taken to a local dealer, where it was diagnosed that the head unit software needed to be updated; however, the part for the repair was on backorder. The vehicle was not repaired and occasionally failed to start. The VIN was not included in NHTSA Campaign Number: 18V935000 (Visibility) or Number: 18V626000 (Parking Brake). The manufacturer was made aware of the failure. The failure mileage was 23,191.
The contact owns a 2018 Subaru Legacy. The contact stated that the display touch screen laminated cover had developed bubbles, causing the touch screen to malfunction. The contact stated that while operating the vehicle, the display erroneously turned on or erroneously turned off. During the failure, the touch screen feature was inoperable, and the driver was unable to access certain safety features within the settings on the display. The vehicle was taken to the local dealer who diagnosed that the touch screen display unit was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 30,000.
Windows, wipers & sunroof all 32 →
The contact owns a 2018 Subaru Legacy. The contact stated that while driving at 40 MPH, she heard an abnormal loud popping sound coming from the top of the vehicle. The contact stated that she pulled into the nearest gas station and noticed that the sunroof glass had shattered and fell onto the shade guard. The dealer was notified of the failure and informed the contact that she would be responsible for the cost of the repair. The manufacturer was notified of the failure through an online request. The vehicle was not diagnosed nor repaired. The approximate failure mileage was 72,000.
The contact owns a 2018 Subaru Legacy. The contact stated that while driving at an undisclosed speed, the screen display went blank. The contact related the failure to NHTSA Campaign Number: 18V935000 (Visibility). The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 102,000.
Engine & cooling
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.
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. …
2018 Subaru Legacy engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.5L 4-cyl | CVT | AWD | 25 / 34 / 29 |
| 3.6L 6-cyl | CVT | AWD | 20 / 28 / 23 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2018 Subaru Legacy a good car?
Based on 117 owner complaints filed with NHTSA, the 2018 Legacy rates use caution: 1.6× as many complaints as a typical year of the Legacy at the same age. It is one of the Legacy years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2018 Subaru Legacy?
The electrical system — 40 complaints, 34% of all complaints for this model year, most often about instrument panel › fuel gauge. Next are the windows, wipers & sunroof (32) and engine & cooling (10).
How many recalls does the 2018 Subaru Legacy have?
There are 3 recalls for the 2018 Subaru Legacy, the most recent from July 29, 2021 (fuel pump). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Subaru Legacy?
The best years by complaints, compared at the same age, are 2023, 2025 and 2021. Years to avoid or approach with caution: 2015, 2016, 2011, 2020 and 2019. See the full Subaru Legacy years comparison.
At what mileage do 2018 Subaru Legacy problems happen?
The median mileage reported in complaints is about 21,000 miles; 87% of problems with a recorded mileage started before 50,000 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.