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2018 Kia Rio Maintenance Schedule

Manufacturer-recommended service intervals for the Service Reminder and open recall alerts for your 2018 Kia Rio.

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Recalls1Full scheduleKnown issues6

How Kia schedules service: Service Reminder

Kia uses Hyundai Motor Group's powertrains, so service intervals mirror Hyundai's. Kia Promise covers the first 3 years / 36,000 miles of complimentary maintenance. Kia owners with the Theta II 2.0L/2.4L (Optima, Sorento, Sportage 2011-2019) should adhere strictly to oil intervals due to known oil-consumption issues in Kia TSBs.

⚠️

1 Open Recall

Source: NHTSA

LATCHES/LOCKS/LINKAGES:TRUNK LID:LATCH

Campaign #21V622000 · Sep 8, 2021

Issue: Kia Motors America (Kia) is recalling certain 2016-2018 Forte 4-door, Forte Koup 2-door, and 2018-2019 Rio 4-door vehicles. The trunk latch may become damaged, preventing the opening of the trunk from the inside. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 401, "Internal Trunk Release."

Risk: A person inside the trunk compartment may become trapped, increasing their risk of injury.

Fix: Dealers will replace the trunk latch assembly, free of charge. Owner notification letters were mailed on February 10, 2022. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC216.

Recall data refreshed Jul 26, 2026.

Essential maintenance

Critical for safety and preventing major damage

🛢️

Engine Oil & Filter

Every 3,750 mi

Severe service: every 3,750 miles. Normal: 7,500 miles. Theta II 2.0L/2.4L on Optima, Sorento, Sportage (2011-2019): full synthetic only, never extend.

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. Telluride and Sorento AWD owners benefit from rotation every 5,000 miles to prevent uneven wear.

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 and rotors every 7,500 miles. Forte and Soul front pads typically last 40,000-55,000 miles.

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.

🧪

Brake Fluid

Every 30,000 mi

Replace DOT 3 brake fluid every 30,000 miles or 24 months. Required for ABS and ESC pump longevity.

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. Severe or dusty conditions: 15,000 miles.

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.

⚙️

Automatic Transmission Fluid

Every 30,000 mi

Severe service: every 30,000 miles. Normal: 60,000 miles. Use Kia SP-IV — same as Hyundai.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

⚡

Spark Plugs

Every 105,000 mi

Iridium-tipped plugs rated 105,000 miles on most Kia engines. 1.6T (Forte GT, Soul Turbo): 60,000 miles. 3.5L Lambda II V6 (Telluride, Sorento): 105,000 miles.

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.

🌡️

Long-Life Coolant

Every 30,000 mi

Kia Long-Life Coolant (pink, same as Hyundai): first change at 60,000 miles, then every 30,000. Do not mix with green or orange coolant.

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.

🔩

Transfer Case / Rear Diff (AWD)

Every 60,000 mi

Sportage AWD, Sorento AWD, Telluride AWD: replace transfer case fluid and rear diff fluid every 60,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$105–$140

Shop

~$75–$100

DIY

~$15–$40

AWD/4WD vehicles only. Easy drain-and-fill on most platforms.

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. Located behind the glove box on Optima, Forte, and Sportage; behind the dashboard panel on Telluride.

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 Kia Rio.

Reported to NHTSA

Engine oil consumption between oil changes

ENGINE

7 NHTSA complaints · 2022-12 → 2026-05

“My 2018 Kia Rio is burning 2 quarts of oil every 800 miles, confirmed by a Kia dealership through an official oil consumption test. The issue first started around 110,000 miles and has progressively gotten worse…”
— Owner report, NHTSA ODI #11700932
“For the past year and few months I’ve been having to do an oil change every two weeks because of how fast the engine is burning the oil. Several times I arrive to the shop to find the oil pan is completely empty causing issues with my engine beginning to make strange noises…”
— Owner report, NHTSA ODI #11559237
“Excessive engine oil consumption which has caused car to enter limp mode”
— Owner report, NHTSA ODI #11526075

Read all complaints on NHTSA →

Engine failure and stalling while driving

ENGINE

4 NHTSA complaints · 2024-02 → 2025-10

“My 2018 Kia Rio S (VIN [XXX] ) suffered sudden engine failure at approximately 84 000 miles. I pulled over immediately when the oil light came on, but the engine began rattling and was later diagnosed by the dealer as a bearing/seizure failure requiring full engine replacement…”
— Owner report, NHTSA ODI #11691729
“2018 Kia Rio – severe oil consumption leading to low compression (30 PSI on Cylinder 2) and engine failure. Dealership installed incorrect non-OEM spark plugs prior to failure. Kia denies warranty coverage although this matches known engine defects in other Kia models”
— Owner report, NHTSA ODI #11692892
“The contact owns a 2018 Kia Rio. The contact stated that while driving at an undisclosed speed, the vehicle stalled with the check engine warning light illuminated. The vehicle was restarted…”
— Owner report, NHTSA ODI #11646521

Read all complaints on NHTSA →

Engine compartment fire while driving

ENGINE AND ENGINE COOLING

2 NHTSA complaints · 2024-06 → 2025-04

“The contact owned a 2018 Kia Rio. The contact stated that while driving on the highway at 85 MPH, the engine emitted abnormal noise with no warning lights illuminated. The contact proceeded to exit the highway and enter a gas station parking lot, and upon exiting the vehicle…”
— Owner report, NHTSA ODI #11652874
“My 2018 Kia Rio actually lit up on fire as I was driving down the highway on way to work. As I drove down the highway, I noticed that I had trouble using the brakes. It seemed as if they were working one second and then not working the next. At that time, I noticed fire coming…”
— Owner report, NHTSA ODI #11593284

Read all complaints on NHTSA →

Airbag light and passenger OCS mat fault

ELECTRICAL SYSTEM, AIR BAGS

3 NHTSA complaints · 2026-01 → 2026-03

“My car is a 2018 Kia Rio that has a clean history and has never been in an accident. Recently my airbag light came on and I had a diagnostic run that showed a B1448 code indicating an OCS mat defect in the passenger seat…”
— Owner report, NHTSA ODI #11713726
“Took my car in as the airbag light on the dashboard kept turning on and off— with or without a passenger in the seat. The dealership ran a diagnostic inspection and turns out that the passenger side OCS Mat and ECU are faulty and need to be replaced…”
— Owner report, NHTSA ODI #11727369

Read all complaints on NHTSA →

Trunk latch failure and recall part availability

LATCHES/LOCKS/LINKAGES

4 NHTSA complaints · 2021-06 → 2022-07

“The contact owns a 2018 Kia Rio. The contact stated while attempting to open the rear trunk a clicking noise was heard coming from the trunk as the trunk failed to open. The contact attempted multiple times to open the trunk but it would not open…”
— Owner report, NHTSA ODI #11421816
“The contact owns a 2018 Kia Rio. The contact received notification of NHTSA Campaign Number: 21V622000 (Latches/Locks/Linkages) however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not available…”
— Owner report, NHTSA ODI #11442870
“My vehicle was recalled for a "interior trunk release" issue. My trunk will not open at all anymore…”
— Owner report, NHTSA ODI #11454745

Read all complaints on NHTSA →

Vehicle theft and anti-theft alarm function

UNKNOWN OR OTHER

2 NHTSA complaints · 2022-12 → 2023-01

“My vehicle was stolen while parked with a club on the steering wheel then damaged and abandoned. I was without a vehicle for a month during repairs. It has been reported on the news that Kias are easily stolen due to the type of ignition system…”
— Owner report, NHTSA ODI #11498683
“Auto theft alarm listed as standard. There is NO THEFT DETECTION AT ALL. There is only a bogus flashing led that does nothing when parked. This is fraud.”
— Owner report, NHTSA ODI #11501364

Read all complaints on NHTSA →

Issues on other model years

  • 2015 Kia Rio →
  • 2016 Kia Rio →
  • 2017 Kia Rio →
  • 2019 Kia Rio →
  • 2020 Kia Rio →
  • 2021 Kia Rio →

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Jul 29, 2026. Investigation data refreshed Jul 29, 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 Kia Rio reflects Kia's published service intervals and the Service Reminder system. 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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