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2018 Subaru Forester Maintenance Schedule

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

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Recalls3Full scheduleKnown issues7

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.

AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION

Campaign #19V701000 · Mar 10, 2019

Issue: Subaru of America, Inc. (Subaru) is recalling certain 2015-2018 Forester vehicles equipped with heated seats. An electrical connection in the front passenger seat for the Occupant Detection System (ODS) may loosen.

Risk: 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.

Fix: Subaru will notify owners, and dealers will inspect and, as necessary, replace the ODS sensor mat harness, free of charge. The recall began February 11, 2020. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WUM-98.

TIRES

Campaign #18V455000 · Oct 7, 2018

Issue: Subaru of America, Inc. (Subaru) is recalling certain 2018 Subaru Forester vehicles. The Certification Label may indicate the incorrect wheel size, tire size, and air pressure. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."

Risk: Installing incorrect tires or applying incorrect tire air pressure may increase the risk of a crash.

Fix: Subaru will notify owners, and dealers will install a corrected label, free of charge. The recall began July 26, 2018. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WTS-78.

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 Forester.

Reported to NHTSA

AC compressor and condenser failure

UNKNOWN OR OTHER

14 NHTSA complaints · 2022-08 -> 2026-06 (200 most-recent of 487 total)

“The AC compressor needs replaced and I see a lot of complaints on-line about this specific model- 2018 Forester so I am reporting in case it may help with a recall. Cost to repair is $2,000+. Right now it may only be covered under warranty or through a TSB goodwill...”
— Owner report, NHTSA ODI #11710521
“While driving the vehicle I began to hear a loud grinding noise from the engine compartment when the A/C was engaged. I pulled over to look under the hood and it sounded like the noise was coming from the serpentine belt. Upon inspection by a Subaru dealership it...”
— Owner report, NHTSA ODI #11683935

Read all complaints on NHTSA →

Battery parasitic drain and no-start

ELECTRICAL SYSTEM

30 NHTSA complaints · 2021-12 -> 2026-05 (200 most-recent of 487 total)

“My car is a 2018 with only 28100 miles on it. I have now had to replace the battery three times. Subaru tells me I need to drive it every two days in order to keep it from discharging the battery. This is unacceptable. Clearly there is a parasitic drain. My issue...”
— Owner report, NHTSA ODI #11505156
“Battery continues to drain when car is parked/off causing a required jump start and then recharging of the battery. Dealer replaced battery one time in 2019 (with expense to owner) and recommended driving car every couple of days to ensure it does not draw down...”
— Owner report, NHTSA ODI #11456315

Read all complaints on NHTSA →

Windshield cracking without impact

VISIBILITY/WIPER

30 NHTSA complaints · 2021-12 -> 2026-05 (200 most-recent of 487 total)

“Windshield crack developed in July of 2022 on the passenger side of the vehicle. The small crack grew large within a day, covering half the windshield. This crack developed out of nowhere - no items had hit the windshield. In January of 2023, less than a year...”
— Owner report, NHTSA ODI #11505559
“I bought my 2018 Subaru Forester in may of 2020 it is now January of 2022 and I have replaced the entire windshield THREE TIMES. If requested, my vehicle can be inspected. It is clear that this windshield is too fragile and poses a safety risk for myself and...”
— Owner report, NHTSA ODI #11448115

Read all complaints on NHTSA →

Front lower control arm bushing wear

SUSPENSION

12 NHTSA complaints · 2022-01 -> 2025-11 (200 most-recent of 487 total)

“What component or system failed or malfunctioned, and is it available for inspection upon request? Lower control arm bushings are worn out. How was your safety or the safety of others put at risk? The vehicle starts to wobble and vibrate violently when driving...”
— Owner report, NHTSA ODI #11544285
“Lower control arm bushing initial stages of premature failure. Issue is a known common defect. No safety incident yet, but potential for steering and control issues while driving. Bushing crack was discovered during brake inspection at 45k miles.”
— Owner report, NHTSA ODI #11585233

Read all complaints on NHTSA →

Passenger airbag occupant detection deactivation

AIR BAGS

40 NHTSA complaints · 2021-12 -> 2026-06 (200 most-recent of 487 total)

“The passenger airbag light in my 2018 Subaru Forester intermittently turns off and on, even when the seat is occupied. The vehicle has never been in a crash, and the airbags have not deployed. This issue raises serious safety concerns, especially since it may prevent...”
— Owner report, NHTSA ODI #11695780
“Air bag sensor in passenger seat doesn't recognize when someone is in it therefore keeping it from activating in the event of an accident. There was a recall (Subaru # WUM98R, NHTSA campaign # 19V701) for that problem for 2015-2018 model years which mine is and with...”
— Owner report, NHTSA ODI #11487009

Read all complaints on NHTSA →

Unintended acceleration during low-speed maneuvers

VEHICLE SPEED CONTROL

14 NHTSA complaints · 2022-01 -> 2025-06 (200 most-recent of 487 total)

“Unknown system that failed but vehicle equiped with EyeSight and all of Subaru safety features. Air bag did not deploy. Pulling into curbed parking space at city park. Speed <10 mph while in parking lot. Applied brake while pulling in space to park and car...”
— Owner report, NHTSA ODI #11453186
“The contact owns a 2018 Subaru Forester. The contact stated while driving approximately 2 MPH while pulling into a parking spot, the vehicle lurched forward. The contact stated that she heard the engine revving but did not notice any warning lights. The contact...”
— Owner report, NHTSA ODI #11455220

Read all complaints on NHTSA →

Fuel pump stalling and power loss

FUEL/PROPULSION SYSTEM

11 NHTSA complaints · 2021-12 -> 2025-06 (200 most-recent of 487 total)

“Fuel Pump. Stalled in intersection in middle lane at expressway entrance. Car stalled 3 x before I could move out of intersection to safety. Kept pressing gas peddle but car would not move then sputtered going a few feet before stopping again. 3x Cars were going...”
— Owner report, NHTSA ODI #11661980
“The contact owns a 2018 Subaru Forester. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull to the shoulder of the roadway, where the vehicle was able to be restarted. After...”
— Owner report, NHTSA ODI #11651173

Read all complaints on NHTSA →

Note: NHTSA also opened 1 defect investigation(s) on this vehicle that closed without action.

Issues on other model years

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

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 Forester 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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