Manufacturer-recommended service intervals for the Service Reminder and open recall alerts for your 2018 Kia Sorento.
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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.
STEERING:ELECTRIC POWER ASSIST SYSTEM
Campaign #18V656000 · Sep 21, 2018
Issue: Kia Motors America (Kia) is recalling certain 2018 Kia Sorento vehicles. The cowl crossbar that connects to the Motor Driven Power Steering (MDPS) steering column may be improperly welded, allowing the steering column to separate.
Risk: If the steering column separates, it can cause a loss of steering ability, increasing the risk of a crash.
Fix: Kia will notify owners, and dealers will replace the cowl crossbar, free of charge. The recall began October 26, 2018. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC167.
AIR BAGS:SIDE/WINDOW
Campaign #17V784000 · Aug 12, 2017
Issue: Kia Motors America (Kia) is recalling certain 2018 Kia Sorento vehicles. The side curtain air bags on these vehicles have a component that may detach during deployment of the inflatable curtain air bag.
Risk: If the component detaches during deployment, it may enter the passenger compartment and be a projectile within the vehicle cabin, increasing the risk of injury.
Fix: Kia will notify owners, and dealers will replace the driver and passenger side curtain air bags, free of charge. The recall began on December 18, 2017. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC159.
TRAILER HITCHES
Campaign #22V703000 · Sep 19, 2022
Issue: Kia America, Inc. (Kia) is recalling certain 2016-2022 Sorento, 2021-2022 Sorento Hybrid (HEV), 2022-2023 Sorento Plug-In Hybrid (PHEV), and 2017-2022 Sportage vehicles equipped with a tow hitch harness installed as original equipment, or purchased as an accessory through a Kia dealership. Debris and moisture accumulation on the tow hitch harness module printed circuit board (PCB) may cause an electrical short, which can result in a fire.
Risk: A fire while parked or driving can increase the risk of injury.
Fix: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will inspect the vehicle, and, as necessary, replace the fuse and/or tow hitch harness module, free of charge. Owner notification letters were mailed August 11, 2023. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC249.
Critical for safety and preventing major damage
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.
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.
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.
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.
Keeps your vehicle running smoothly and efficiently
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.
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.
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.
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.
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.
Extends the life of your vehicle and improves comfort
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.
What drivers and federal regulators have officially reported about the 2018 Kia Sorento.
EXTERIOR LIGHTING
31 NHTSA complaints · 2021-01 → 2025-08 (based on 200 most-recent of 248 total complaints)
“The headlights will randomly turn off while driving, mostly when turning on the right blinker. This has been happening a few times a month since I got the vehicle in 2017. More recently, the bottom brake lights and running lights have been shorting out.”
STEERING
14 NHTSA complaints · 2022-02 → 2026-02 (based on 200 most-recent of 248 total complaints)
“Clunking and sticking steering wheel due to rubber coupling that connects electric steering motor to steering column disintegrates. The dealer acknowledges that there is a mass wide issue with this component failure, but says it is not covered under warranty past 60k miles…”
“As One is driving at 50-60 mph the steering wheel sticks and requires force to correct the direction the vehicle is going. This is very concerning because the abrupt motion is extremely dangerous.”
TRAILER HITCHES
7 NHTSA complaints · 2023-01 → 2024-05 (based on 200 most-recent of 248 total complaints)
“The contact owns a 2018 Kia Sorento. The contact received notification of NHTSA Campaign Number 22V703000 (Trailer Hitches) 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…”
“2018 KIA SORENTO. CONSTITUENT WRITES IN REGARD TO A DEFECTIVE HITCH HARNESS.”
STRUCTURE
6 NHTSA complaints · 2022-12 → 2026-03 (based on 200 most-recent of 248 total complaints)
“2018 Kia Sorento. Snow White Pearl paint started delaminating at about 45,000 miles. Now it has 51,000 miles and I have multiple spots where it is delaminating on the hood, front bumper, and fender…”
“Paint is peeling on the roof of my Kia by the windshield. No incident has happened this is a manufacturer defect.. My car has never been involved in a car accident. No incidents.”
SERVICE BRAKES
5 NHTSA complaints · 2022-02 → 2026-07 (based on 200 most-recent of 248 total complaints)
“The contact owns a 2018 Kia Sorento. The contact stated while coming to a stop, there was a loud grinding sound coming from the brakes while the brake pedal was depressed. There was no warning light illuminated…”
“To Whom It May Concern, I hope this message reaches someone who values the sanctity of human life. Today, while driving home, my husband experienced a terrifying incident: the brakes on our car completely failed…”
ENGINE
93 NHTSA complaints · 2021-02 → 2026-05 (based on 200 most-recent of 248 total complaints)
“Engine is burning oil at a rate of almost one quart per week. The engine can be felt shaking when driving. The engine light came on and states there is a P0303 Cylinder 3 misfired detected.”
“The engine suddenly failed while I was driving on the highway. The vehicle lost power without warning, which created a dangerous situation. I had to pull over and have the vehicle towed.”
“On January 30, 2026, I was driving with my daughter from Kansas City to Platte City when the vehicle experienced a sudden and catastrophic mechanical failure. As we approached our exit, the engine unexpectedly revved and the vehicle rapidly decelerated to approximately 30 mph…”
AIR BAGS
5 NHTSA complaints · 2021-02 → 2026-02 (based on 200 most-recent of 248 total complaints)
“I was in a weather related accident where I hit the guardrail twice head on and none of my airbags deployed. My vehicle is currently at a tow yard and will be towed to the autobody shop 12/8/2021…”
“My passenger occupancy sensor needs to be replaced. I Can not afford the $1170 Kia is charging. My car’s warranty expired in March. The passenger air bag light came on in the ending of July 2023. I tried reaching out to Kia but with no help…”
Note: NHTSA also opened 1 defect investigation(s) on this vehicle that closed without action.
Issues on other model years
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 Kia Sorento 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.