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Kia Sorento — what actually breaks, by engine

2015–2025 · 2,300 federal complaints · 7 engines

Reliability ratings usually stop at the model. But two Sorentos with different engines can fail in completely different ways — and the engine is a choice you make at purchase. Here is what owners actually complained about, separated by engine.

Kia Sorento
Photo: Vauxford · CC BY-SA 4.0

Ownership profile

Each axis is this model's percentile within its own segment — comparing a pickup's fuel economy against a compact car's would say nothing. Built from EPA test data.

Fuel economy79Running cost75Low emissions79Cabin spacenot measuredCargo spacenot measuredDisplacement27
24 MPG Fuel economy$2,550/yr Running cost377 g/mi Low emissions2.5 L Displacement

Value for money

92/ 100

$25,750

Capability per relative dollar, ranked against the same segment. It divides this model's average percentile across the axes above by its price relative to the segment median — so 80 means it delivers more per dollar than 80% of its class.

Price source: CarAPI vehicle trim database — base-trim MSRP, median across 2015-2020 model years. Unlike every other figure on this page, the price does not come from a federal record. It is the manufacturer's list price for the cheapest trim — what people actually paid varies with incentives and options, so treat this one axis as indicative, not exact.

What each engine's complaints are about

Share of component mentions. One complaint can name several components, so these describe what an engine's complaints are about — they are not a failure rate.

Transmission & drivetrainEngineBrakesElectricalSteeringBody & structureFuel systemEverything else

LAMBDA-II · 3.3L V6

2016–2020 · Naturally aspirated

811complaints
Engine 22%Electrical 12%
Show the numbers
ComponentShareMentions
Transmission & drivetrain6.0%69
Engine21.5%246
Brakes2.5%29
Electrical12.2%140
Steering6.1%70
Body & structure5.2%59
Fuel system3.1%35
Everything else43.3%495

THETA-II · 2.4L I4

2017–2020 · Naturally aspirated

662complaints
Engine 47%
Show the numbers
ComponentShareMentions
Transmission & drivetrain4.6%40
Engine46.6%404
Brakes1.6%14
Electrical6.3%55
Steering5.9%51
Body & structure2.3%20
Fuel system4.6%40
Everything else28.0%243

LAMBDA II · 3.3L V6

2015–2015 · Naturally aspirated

287complaints
Engine 36%Body & structure 12%
Show the numbers
ComponentShareMentions
Transmission & drivetrain3.4%13
Engine36.1%138
Brakes4.2%16
Electrical5.5%21
Steering2.1%8
Body & structure12.0%46
Fuel system2.9%11
Everything else33.8%129

THETA-III · 2.5L I4 281hp

2021–2025

239complaints
Transmission & drivetrain 21%Engine 15%Electrical 12%
Show the numbers
ComponentShareMentions
Transmission & drivetrain21.3%83
Engine15.2%59
Brakes4.4%17
Electrical12.3%48
Steering3.1%12
Body & structure0.5%2
Fuel system4.4%17
Everything else38.8%151

THETA-III · 2.5L I4 191hp

2021–2025

116complaints
Transmission & drivetrain 11%Engine 20%Electrical 17%
Show the numbers
ComponentShareMentions
Transmission & drivetrain10.6%21
Engine19.6%39
Brakes7.5%15
Electrical16.6%33
Steering3.5%7
Body & structure0.5%1
Fuel system4.5%9
Everything else37.2%74

GAMMA-II · 1.6L I4

2021–2023 · Turbo

110complaints
Transmission & drivetrain 13%Engine 22%Electrical 18%Fuel system 10%
Show the numbers
ComponentShareMentions
Transmission & drivetrain12.9%22
Engine21.6%37
Brakes4.1%7
Electrical18.1%31
Steering1.2%2
Body & structure2.3%4
Fuel system9.9%17
Everything else29.8%51

THETA-II · 2.0L I4

2017–2018 · Turbo

75complaints
Engine 30%
Show the numbers
ComponentShareMentions
Transmission & drivetrain3.9%4
Engine30.4%31
Brakes2.9%3
Electrical6.9%7
Steering5.9%6
Body & structure2.0%2
Fuel system7.8%8
Everything else40.2%41

Diagrams show cylinder layout and displacement from the decoded VIN data. Turbo and supercharger marks come from EPA certification records; where EPA cannot tell two engines of the same size apart, the mark is left off rather than guessed.

How many of those complaints involved a fire, crash or injury

Unlike the totals above, these can be compared between engines. Each figure is a share of that engine's own complaints, so how many were sold cancels out. The vertical mark is the average across every vehicle in this database.

LAMBDA-II · 3.3L V6

811
Fire5.4%+
Crash2.5%
Injury2.6%

THETA-II · 2.4L I4

662
Fire3.0%
Crash3.2%
Injury2.7%

LAMBDA II · 3.3L V6

287
Fire1.4%
Crash2.8%
Injury1.0%

THETA-III · 2.5L I4 281hp

239
Fire0.8%
Crash1.3%
Injury1.7%

THETA-III · 2.5L I4 191hp

116
Fire0.9%
Crash6.0%
Injury4.3%

GAMMA-II · 1.6L I4

110
Fire0.9%
Crash1.8%
Injury0.9%

all vehicles — Fire 1.1% · Crash 4.4% · Injury 2.6%

Still a share of complaints, not of vehicles on the road — it says how severe this engine's reported problems were, not how often it gets into trouble. Engines with fewer than 80 complaints are left out: fire is rare enough that a single extra case would swing the number.

Recalls on this model

Unlike everything above, recalls are issued for the whole model, not per engine — NHTSA publishes them by make, model and year. These are defects the manufacturer confirmed and filed federally, which makes them a useful counterweight to owner-reported complaints.

NHTSA told owners to park outside, away from buildings

The defect can start a fire even with the car parked and switched off.

  • Trailer Hitches — 2016–2022 22V703000
  • Service Brakes, Hydraulic › Antilock/Traction Control/Electronic Limited Slip › Control Unit/Module — 2015–2015 21V331000
  • Service Brakes, Hydraulic › Antilock/Traction Control/Electronic Limited Slip › Control Unit/Module — 2015–2015 20V519000

How this compares with what owners report →

25 recalls · covering 2015–2025

Electrical System 4Engine And Engine Cooling 3Trailer Hitches 2Service Brakes, Hydraulic 2Back Over Prevention 2Power Train 2Fuel System, Gasoline 2Equipment 1
All recalls, with campaign numbers
YearsComponentNHTSA campaign
2016–2022Trailer Hitches22V703000
2015–2015Service Brakes, Hydraulic › Antilock/Traction Control/Electronic Limited Slip › Control Unit/Module21V331000
2015–2015Service Brakes, Hydraulic › Antilock/Traction Control/Electronic Limited Slip › Control Unit/Module20V519000
2025–2025Electrical System › Instrument Cluster/Panel26V046000
2021–2023Electrical System › Wiring › Fuses And Circuit Breakers25V649000
2025–2025Engine And Engine Cooling › Critical Fasteners25V548000
2024–2025Electrical System › Body Control Module › Software25V006000
2024–2024Electrical System › Wiring24V287000
2019–2019Back Over Prevention › Sensing System › Camera23V639000
2022–2023Back Over Prevention › Sensing System › Camera23V610000
2023–2023Equipment › Other › Labels23V579000
2021–2022Power Train › Automatic Transmission22V760000
2016–2016Power Train › Automatic Transmission › Lever And Linkage › Column Shift22V612000
2022–2022Tires › Temporary/Emergency Spare Tire22V509000
2022–2022Engine And Engine Cooling › Engine › Gasoline › Turbo/Supercharger22V202000
2021–2021Fuel System, Gasoline › Delivery › Hoses, Lines/Piping, And Fittings21V519000
2015–2017Fuel System, Gasoline › Delivery › Hoses, Lines/Piping, And Fittings18V907000
2018–2018Steering › Electric Power Assist System18V656000
2018–2018Air Bags › Side/Window17V784000
2017–2017Engine And Engine Cooling › Engine17V586000
2016–2017Trailer Hitches16V862000
2016–2016Seats16V770000
2016–2016Suspension › Rear16V480000
2016–2016Seat Belts › Front › Buckle Assembly15V446000
2016–2016Vehicle Speed Control › Accelerator Pedal15V089000

Recall repairs are free, always — any franchised dealer, regardless of the car's age, mileage, or how many owners it has had. A great many cars are driving around with recalls nobody ever redeemed.

More recalls does not mean a worse car. Recall counts rise with sales volume and model complexity, and a manufacturer that recalls promptly looks worse than one that drags its feet. Read what the recalls were for, not how many there were.

Check a specific car by VIN at NHTSA →

NHTSA crash-test ratings

Official 5-star ratings from standardized federal crash tests. Unlike the complaint figures above, these are directly comparable between models. Where a model year was tested in several versions, the lowest overall rating is shown.

Overall · 2025
★★★★★
Frontal · 2025
★★★★☆
Side · 2025
★★★★★
Rollover · 2025
★★★★☆

15.9% rollover risk

Model yearOverallFrontalSideRollover
2015★★★★★★★★★★★★★★★★★★★☆
2016★★★★★★★★★★★★★★★★★★★☆
2017★★★★★★★★★★★★★★★★★★★☆
2018★★★★★★★★★★★★★★★★★★★☆
2019★★★★★★★★★★★★★★★★★★★☆
2020★★★★★★★★★★★★★★★★★★★☆
2021★★★★☆★★★★☆★★★★★★★★★☆
2022★★★★☆★★★★☆★★★★★★★★★☆
2023★★★★☆★★★★☆★★★★★★★★★☆
2024★★★★★★★★★☆★★★★★★★★★☆
2025★★★★★★★★★☆★★★★★★★★★☆
Stability control: StandardLane-departure warning: Standard

Source: NHTSA New Car Assessment Program.

Method, sources and limitations

How this was built

  1. Source: NHTSA public complaint database (api.nhtsa.gov), retrieved 2026-08-16. Every complaint carries the first 11 characters of the vehicle's VIN.
  2. Those partial VINs were decoded through NHTSA's vPIC service to identify the exact engine — 98.2% resolved successfully. This is how the data gets to engine level; model-level ratings cannot do this.
  3. Percentages are the share of component mentions, not of complaints. One complaint can name several components, so the figures describe what a given engine's complaints are about — they do not sum to a failure rate.

What this does not tell you

  • This is not a reliability ranking. Complaint totals track how many were sold, not how often they fail. Nobody publishes per-engine sales volume, so comparing totals between engines would be misleading. Read each engine's own breakdown; don't race them against each other.
  • Engines with fewer than 50 complaints are omitted — too small to say anything honest about.
  • Complaints are self-reported by owners. They skew toward problems that are alarming or expensive, and toward vehicles under active recall attention.

Compare with

Same segment, side by side — engines, running costs and what breaks.

Or see the whole segment at once: Midsize SUV →

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