Excessive oil consumption
2018 Kia Sorento engine problems
moderate 81 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
81
Recalls
0
Avg fix
$3,100
1fire
What stands out
Engine accounts for 33% of every owner complaint on file for this vehicle — the dominant problem area across 11 categories tracked.
Owners have filed 81 engine complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
The failure pattern owners describe
Buyer takeaway: The 2018 Kia Sorento's 2.4-liter GDI engine suffers from a documented defect causing excessive oil consumption, catastrophic internal failure, and sudden loss of power without warning—often at highway speeds. Kia has issued recalls and technical bulletins but denies warranty coverage for out-of-warranty vehicles and enforces strict conditions, leaving owners to bear thousands in replacement costs or face dangerous breakdowns.
Owners consistently report two core engine issues: silent oil loss and sudden catastrophic failure. The first problem starts with the engine burning or losing 1–4 quarts of oil per 400–1,200 miles—so fast that owners find the dipstick bone dry 1,200 miles after an oil change—yet no warning lights alert them. No leaks appear underneath. This silent drain eventually starves rod bearings and pistons of lubrication, leading to the second problem: catastrophic failure that arrives without warning. Owners describe driving at highway speeds when the engine suddenly knocks violently, fills the cabin with white or blue smoke, loses all power, and stalls. Metal debris scatters across the roadway. Steering and brakes become sluggish or inoperable. One owner reported a hole in the engine block; another, a broken valve and severe internal damage. Kia has issued a knock sensor software recalibration (KSDS recall) meant to trigger limp mode before catastrophic failure, but owners report the fix sometimes masks the problem instead of solving it—the knock persists but the sensor no longer reports it, blocking warranty claims. Owners also describe engine oil leaks from cylinder heads and spark plug areas, along with insufficient oil pressure despite adequate oil on the dipstick, suggesting undersized oil delivery ports. Many dealers demand full engine replacement at $6,000–$9,600, refuse to cover it under warranty if the vehicle is out of the original powertrain window or if the owner missed a recall deadline, and require months of waiting for parts and labor.
Same Kia Sorento engine reports on nearby years: 2015 · 2016 · 2017 · 2019 · 2020
Failure modes owners describe
Excessive oil consumption without warning lights
Engine burns or loses oil rapidly (owners report 1-4 quarts per 400-1200 miles) with no check engine light, oil pressure warning, or low-oil indicator illuminating until levels become dangerously low. Owners discover the problem by manually checking the dipstick at service intervals. No external leaks are present. This condition progresses silently and can culminate in engine seizure.
When: Varies widely; reported from under 50,000 miles to over 100,000 miles
Symptoms owners cite: Dipstick shows little to no oil despite recent oil change; No warning lights on dashboard; Owner must manually top off oil every 1-2 weeks; No visible oil leaks underneath vehicle; Engine eventually seizes if not caught
Codes mentioned: P1326 (knock sensor code—some owners report this before recalibration masked it)
Repairs/costs cited: Kia dealerships recommend combustion chamber cleaning ($500+, does not resolve defect per owners); many require full engine replacement ($6,000–$9,600+). Extended warranty may cover if oil consumption test confirms failure.
Recalls/TSBs owners mention: Class action lawsuit acknowledged; KSDS (Knock Sensor Detection System) recall issued for some model years; TSBs exist for oil consumption; owners report Kia refusing coverage if vehicle is out of warranty or if prior owner missed recall deadline; some owners told engine must 'lock' before replacement is approved
Catastrophic internal engine failure (rod bearing/piston/cylinder failure)
Engine experiences sudden, complete internal mechanical failure while driving at highway speeds with no prior warning. Failures include broken rods, failed bearings, piston ring failure, cylinder compression loss, and hole in engine block. Vehicle loses all power, often accompanied by loud knocking, white/blue smoke, and metal debris scattered on roadway. Owners report steering and braking become difficult or impossible.
When: Typically between 50,000 and 140,000 miles; can occur at any speed without warning
Symptoms owners cite: Sudden loud knocking or ticking from engine; White or blue smoke from exhaust; Complete loss of engine power while driving; Vehicle stalls without restart capability; Metal debris ejected from engine onto roadway; Loss of power steering and/or brake assist in some cases; Oil leaks and burning oil smell
Codes mentioned: Check engine light (may illuminate just before failure), Oil pressure warning light (may illuminate just before failure)
Repairs/costs cited: Full engine replacement required; long-block replacement estimated $5,000–$9,600+. Some owners towed their vehicle and dealers declared it total loss. Repair shops confirm internal bearing wear, rod failure, piston ring damage, valve failure, and material shedding.
Recalls/TSBs owners mention: Kia initially denies warranty claims citing 'internal component failure not covered' or claims customer missed recall deadline. Some owners report Kia refusing to pay because oil consumption test was not performed beforehand. Others report Kia requiring vehicle to be towed at owner's expense and then delaying inspection indefinitely.
Engine knock/detonation with recalibrated knock sensor masking defect
Engine develops persistent knocking or tapping noise audible from the engine bay, often accompanied by abnormal vibration during acceleration or at idle. Owner reports noise to dealer within first few thousand miles; Kia initially claims it is 'normal break-in' noise. Dealer performs knock sensor recalibration (software update) that allegedly masks the underlying rod bearing wear by preventing the knock sensor from detecting the problem and entering limp mode. After recalibration, the knocking persists but the knock sensor no longer triggers, preventing diagnostic code P1326 and blocking warranty engine replacement.
When: Typically within first 3,500 miles for initial diagnosis; knock persists after software update; some owners report increasing knock frequency over years of ownership
Symptoms owners cite: Loud tapping or knocking from engine during acceleration; Knocking most noticeable at idle or light throttle; Vibration felt in steering wheel or seat during knock; Knocking increases over time despite maintenance; After knock sensor recalibration, no diagnostic codes appear but knocking continues
Codes mentioned: P1326 (knock sensor code—present before recalibration; recalibration prevents future occurrence of this code)
Repairs/costs cited: Dealers claim aftermarket oil filter or synthetic oil is responsible (unsubstantiated by owners). Kia refuses to provide diagnostic reports or confirm vehicle safety. Owners state recalibration does not address underlying bearing wear and only prevents the warning system from functioning.
Recalls/TSBs owners mention: ECM knock sensor software recalibration issued as part of recall to prevent engine fire by putting vehicle in limp mode; owners report Kia then refuses to replace engine because knock sensor no longer triggers code P1326; manufacturers blame owner-selected aftermarket oil products
Engine stall/loss of power while driving with no warning
Vehicle suddenly loses engine power while driving at highway or city speeds. Engine stalls completely and vehicle coasts to a stop. No warning lights, sounds, or dashboard messages precede the failure. Owner must use emergency braking to reach safety. Vehicle may or may not restart; if it does, it may enter limp mode and be undriveable or severely underpowered.
When: Occurs suddenly during normal driving; reported between 50,000 and 140,000 miles
Symptoms owners cite: Sudden engine shutdown with no warning lights before failure; Loss of power steering and/or brake boost; Vehicle coasts to stop on roadway; No restart capability or very difficult restart; If restart occurs, vehicle enters limp mode and cannot exceed 18-30 mph; Check engine light may illuminate after failure
Codes mentioned: Check engine light (after stall, not before), P1326 or other codes may appear only post-failure
Repairs/costs cited: Dealers diagnose rod bearing failure, compression loss, or internal seizure; full engine replacement required. Kia initially denies warranty if customer has not completed KSDS recall, even if customer was unaware of recall.
Recalls/TSBs owners mention: Kia denies warranty coverage citing customer did not complete KSDS recall beforehand, even though no recall notice was received; Kia states engine replacement covered only under KSDS if recall was completed prior to failure; no alternative remedy offered
Engine oil leaks from cylinder head or oil delivery lines
Oil leaks from the engine in various locations: cylinder head area, spark plug wells, turbo feed line assembly, or oil pressure ports. Leaks result in rapid oil loss and are often discovered when oil pools under the vehicle or when oil soaks spark plugs. One owner reported condensation spraying from a corroded turbo feed line assembly. Leaks are intermittent or become progressively worse.
When: Reported at various mileages from under 100,000 miles onward; some leaks develop after initial ownership period
Symptoms owners cite: Oil pooling under vehicle; Heavy white smoke from exhaust; Oil soaking spark plugs in cylinder #1 or other cylinders; Oil dripping from engine bay; Condensation or fluid spray from underside of vehicle; Burning oil smell
Codes mentioned: Check engine light (may be present)
Repairs/costs cited: Turbo feed line assembly replacement due to corrosion and perforation; gasket replacements; intake manifold replacement in some cases. Costs and repair timelines not fully specified by owners.
Recalls/TSBs owners mention: No specific manufacturer response noted in narratives; leaks discovered during service or independent inspection
Insufficient oil pressure with warning light activation
Oil pressure warning light illuminates while driving, indicating insufficient oil pressure. Occurs despite engine having adequate oil on dipstick. May be related to clogged or undersized oil delivery ports that cannot deliver sufficient volume to rod bearings and other critical engine components.
When: Reported between 50,000 and 140,000 miles
Symptoms owners cite: Oil pressure warning light illuminates on dashboard; Vehicle may lose power steering assist temporarily; Burning oil odor from engine compartment; Oil on dipstick present but pressure still low; Condensation visible under vehicle
Codes mentioned: Oil pressure warning light
Repairs/costs cited: Owners report Kia acknowledges 999,999-mile warranty on oil pressure stick issue but refuses engine replacement until engine fully seizes. No preventive repair offered.
Recalls/TSBs owners mention: Kia states engine warranty covers oil pressure issue but will not authorize replacement until engine seizes; implies owner must reach dangerous limp mode or complete stall before coverage applies
Synthesized from 81 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 6 most recent
The contact owns a 2018 Kia Sorento. The contact stated that upon starting the vehicle, there was heavy white smoke coming from the exhaust pipes. There was no warning light illuminated. Upon taking the vehicle to an independent mechanic for an oil change, the contact was informed that there was an oil leak coming from the engine. The contact had her son inspect the vehicle, and he discovered…
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.
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 contact owns a 2018 Kia Sorento. The contact stated while driving 50 MPH, the vehicle lost automotive power and jerked and decelerated to 25 MPH. The contact stated that several unknown warning lights were illuminated. The vehicle was driven to a nearby parking lot and parked because the contact was concerned about driving the vehicle. The following day the contact’s husband took the vehicle…
Around 90,000 miles, the engine started leaking oil regularly, took it in for warranty. After repairs for gasket, then started burning oil and running of oil every week or two weeks, and I have to constantly refill oil. Took it again and Dealer told me I am out of warranty, then I called KIA USA and reported problems. They told me that they will get back to me and I am still waiting.
Had engine trouble with your 2018 Kia Sorento?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2018 Kia Sorento?
It's a documented issue but not catastrophic. 81 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 21 complaints that reported odometer mileage, most engine failures cluster between 58,500 and 101,300 miles, with the median around 81,136. A quarter of owners report trouble before 58,500; a quarter make it past 101,300. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Kia/Sorento.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.