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2018 Subaru Legacy Maintenance Schedule

Manufacturer-recommended service intervals and open recall alerts for your 2018 Subaru Legacy.

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Recalls3Full scheduleKnown issues8

How Subaru schedules service

Subaru's symmetrical AWD system places unusually high demands on differential fluid and transfer case service — skipping these is the most common cause of premature drivetrain wear. Older Subarus with the EJ25 engine (pre-2011) require timing belt replacement; FB and FA engines (2011+) use a maintenance-free chain. Subaru's published intervals below align with the owner's manual Schedule II (severe) which most US drivers qualify for.

⚠️

3 Open Recalls

Source: NHTSA

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Campaign #21V587000 · Jul 29, 2021

Issue: 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.

Risk: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

Fix: 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. Subaru's number for this recall is WRG-21.

VISIBILITY:REARVIEW MIRRORS/DEVICES

Campaign #18V935000 · Dec 31, 2018

Issue: 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. As a result, the vehicles fail to comply with requirements of Federal Motor Vehicle Safety (FMVSS) number 111, "Rearview Mirrors."

Risk: Failure to display the rearview image while backing up increases the risk of crash.

Fix: 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. Subaru's number for this recall is WTZ-85.

ELECTRICAL SYSTEM:SOFTWARE

Campaign #18V773000 · Jan 11, 2018

Issue: 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.

Risk: The inaccurate fuel display may cause a driver to unexpectedly run out of fuel and the vehicle to stall, increasing the risk of a crash.

Fix: 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. Subaru's number for this recall is WTW-82.

Recall data refreshed Jul 26, 2026.

Essential maintenance

Critical for safety and preventing major damage

🛢️

Engine Oil & Filter

Every 6,000 mi

Replace 0W-20 full-synthetic oil and filter every 6,000 miles. WRX/STI 2.0L/2.5L turbo: 3,750 miles. Non-turbo FB engines: 6,000 miles severe / 10,000 normal.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

🔄

Tire Rotation

Every 7,500 mi

Rotate tires every 7,500 miles. Critical on Subaru AWD — uneven tread depth across all 4 tires (>2/32") forces the center differential to bind, damaging the AWD coupling.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Often free at the shop where you bought the tires — worth asking before paying.

🛑

Brake Inspection

Every 7,500 mi

Inspect brake pads, rotors, calipers, and parking brake every 7,500 miles. Outback and Forester pads commonly last 35,000-50,000 miles depending on terrain.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.

🔧

Front Differential / Manual Transmission Fluid

Every 30,000 mi

Replace front differential and manual transmission fluid every 30,000 miles. CVT models use proprietary Subaru CVT fluid — a separate item.

Estimated cost — typical U.S. ranges

Dealer

~$150–$195

Shop

~$105–$135

DIY

~$20–$50

🔩

Rear Differential Fluid

Every 30,000 mi

Replace rear differential fluid every 30,000 miles. Use Subaru 75W-90 GL-5 — substitutes can cause whining noises within months.

Estimated cost — typical U.S. ranges

Dealer

~$150–$195

Shop

~$105–$135

DIY

~$20–$50

⚙️

CVT Fluid (Lineartronic)

Every 30,000 mi

Subaru CVT models (Outback, Legacy, Forester, Crosstrek, Impreza, Ascent): replace Lineartronic CVT fluid every 30,000 miles severe / 60,000 normal. Subaru High-Torque CVT-II fluid only — incorrect fluid destroys the chain-and-pulley system.

Estimated cost — typical U.S. ranges

Dealer

~$360–$500

Shop

~$255–$355

DIY

~$80–$180

CVT fluid is manufacturer-specific and pricey — do NOT substitute conventional ATF.

⏱️

Timing Belt (EJ25 engines, pre-2011)

Every 105,000 mi

Older Subarus with the EJ25 boxer engine (Forester, Outback, Legacy 1996-2010): replace timing belt every 105,000 miles. FB and FA boxer engines (2011+) use a chain — no scheduled replacement.

Estimated cost — typical U.S. ranges

Dealer

~$935–$1175

Shop

~$655–$825

DIY

Pro only

On interference engines, a snapped belt destroys valves. Worth doing on schedule. Bundle water pump + tensioner — labor is already there.

🧪

Brake Fluid

Every 30,000 mi

Replace DOT 3 brake fluid every 30,000 miles or 30 months. Subaru's brake hold and EyeSight automatic emergency braking depend on uncontaminated fluid.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Important maintenance

Keeps your vehicle running smoothly and efficiently

💨

Engine Air Filter

Every 30,000 mi

Replace engine air filter every 30,000 miles. WRX/STI: inspect every oil change due to the higher airflow demand of the turbo intake.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

⚡

Spark Plugs

Every 60,000 mi

Iridium plugs every 60,000 miles on FB engines. WRX/STI 2.5L turbo: 30,000 miles due to higher cylinder pressures and EGT.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

🌡️

Super Coolant

Every 30,000 mi

Subaru Super Coolant (blue): first change at 137,500 miles or 11 years, then every 30,000 miles. Do not substitute green or orange — head gasket sealing chemistry depends on the formula.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

Recommended maintenance

Extends the life of your vehicle and improves comfort

🌬️

Cabin Air Filter

Every 15,000 mi

Replace cabin air filter every 15,000 miles. Behind the glove box on most Subaru models.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.

Known issues for this vehicle

What drivers and federal regulators have officially reported about the 2018 Subaru Legacy.

Reported to NHTSA

Infotainment touchscreen delamination and phantom inputs

ELECTRICAL SYSTEM

27 NHTSA complaints · 2019-01 → 2026-07

“The factory Harman Kardon Starlink touchscreen infotainment system in my 2018 Subaru Legacy has experienced severe touchscreen delamination. The display has developed widespread bubbling beneath the glass and now generates repeated "ghost touches" without any driver input…”
— Owner report, NHTSA ODI #11745323
“The navigation/radio screen stopped responding to touch but continues to randomly press buttons. While driving the car the touch screen is randomly calling people, changing radio stations, and messing with the lights and navigation…”
— Owner report, NHTSA ODI #11660490
“The entire radio screen is delaminating. The dealer said it needed updated. They said they updated it. And a new screen would be about $3,000.00. As you can see in the picture the screen is very bubbled. It is almost completely inoperable…”
— Owner report, NHTSA ODI #11530845

Read all complaints on NHTSA →

Windshield cracking without impact

VISIBILITY/WIPER

28 NHTSA complaints · 2019-04 → 2025-08

“ON A COLDER 20 DEGREE MORNING, I STARTED MY 2018 SUBARU LEGACY TO WARM UP. WITHIN A FEW MINUTES AND BEFORE DRIVING AWAY, MY WINDSHIELD SPONTANEOUSLY CRACKED AT THE BOTTOM NEAR THE WIPER BLADE / DEFROST VENTS…”
— Owner report, NHTSA ODI #11386329
“TL* THE CONTACT OWNS A 2018 SUBARU LEGACY. THE CONTACT STATED THAT WHILE INSPECTING THE VEHICLE, THE CONTACT BECAME AWARE OF A CRACK IN THE WINDSHIELD AT THE LOWER CORNER OF THE DRIVER'S SIDE WINDSHIELD. THE CONTACT STATED THAT THE WINDSHIELD WAS CRACKED WITHOUT IMPACT…”
— Owner report, NHTSA ODI #11330023

Read all complaints on NHTSA →

Premature battery failure and drain

ELECTRICAL SYSTEM

7 NHTSA complaints · 2020-07 → 2023-05

“Subaru battery drainage defect. CAN electrical system causing battery to drain when car isn't running. Car may unknowingly not start at any time battery could be dead. Just put new battery in 1 year ago this did not fix the issue…”
— Owner report, NHTSA ODI #11498349
“This vehicle currently has about 55,000 miles on it. I recently had to replace the battery which seems premature for a vehicle just over three years old (at 48865 miles)…”
— Owner report, NHTSA ODI #11419661

Read all complaints on NHTSA →

Fuel gauge inaccurate level readings

FUEL/PROPULSION SYSTEM

8 NHTSA complaints · 2018-12 → 2019-06

“RAN OUT OF GAS ON A FLAT HIGHWAY, WHEN THE INDICATOR SAID THERE WERE 30 MILES LEFT. GAGUE WENT FROM 1/4 TO 0 IN LESS THAN 20 MILES.”
— Owner report, NHTSA ODI #11163378
“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…”
— Owner report, NHTSA ODI #11170153

Read all complaints on NHTSA →

Sunroof glass shattering

UNKNOWN OR OTHER

4 NHTSA complaints · 2018-12 → 2023-09

“Sunroof spontaneously failed. Tempered glass shattered and sprayed into cabin”
— Owner report, NHTSA ODI #11510830
“SUNROOF GLASS EXPLODED AND SHATTERED WHILE DRIVING. THERE WAS NO CAR IN FRONT FOR POTENTIAL ROCK DAMAGE.SUNROOF WAS COVERED SO MOST OF THE GLASS WAS CONTAINED ON THE COVER…”
— Owner report, NHTSA ODI #11161977

Read all complaints on NHTSA →

Steering pull at highway speed

STEERING

3 NHTSA complaints · 2018-09 → 2019-05

“AT SPEEDS ABOVE APPROXIMATELY 50 MPH, THE STEERING HAS SUDDENLY, ERRATICALLY AND WITHOUT WARNING PULLED THE CAR TO THE LEFT OR RIGHT AS IF HIT BY A LARGE GUST OF WIND (WHEN THERE IS NO WIND OR PASSING TRUCK)…”
— Owner report, NHTSA ODI #11124669
“THE CAR VEERS RIGHT OR LEFT IRRADICALLY AS IF A GUST OF WIND PUSHED THE CAR OR LARGE TRUCK PASSED BY. THIS IS VERY TROUBLING SINCE IT HAPPENS SPORADICALLY AND HAS CAUSED THE CAR TO DRIFT OFF THE ROAD.”
— Owner report, NHTSA ODI #11161255

Read all complaints on NHTSA →

Backup camera freezing or blackout

BACK OVER PREVENTION

3 NHTSA complaints · 2025-05 → 2025-08

“Back up camera freezes or doesn't work when backing up- almost caused a accident!”
— Owner report, NHTSA ODI #11658197
“Aug 2025: 2018 Subaru Legacy, 55,500 miles. ISSUE: Rearview camera froze with high-pitch sound for about 10-seconds, then shut off, while in Reverse. I was not aware immediately of this. Did not hit the cars behind me but definitely could have…”
— Owner report, NHTSA ODI #11680112

Read all complaints on NHTSA →

Unintended acceleration from a stop

ENGINE, FUEL/PROPULSION SYSTEM

5 NHTSA complaints · 2019-06 → 2025-11

“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…”
— Owner report, NHTSA ODI #11533427
“I experienced an incident of spontaneous acceleration of my vehicle on November 21, 2025. I was driving slowly with my foot on the brake as I was about to make a turn and the engine suddenly accelerated. I slammed down on the brake and the car stopped, but this was extremely…”
— Owner report, NHTSA ODI #11700941

Read all complaints on NHTSA →

Issues on other model years

  • 2015 Subaru Legacy →
  • 2016 Subaru Legacy →
  • 2017 Subaru Legacy →
  • 2019 Subaru Legacy →
  • 2020 Subaru Legacy →
  • 2021 Subaru Legacy →

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Jul 27, 2026. Investigation data refreshed Jul 27, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2018 Subaru Legacy reflects Subaru's published service intervals. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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