The Lemon Index

All cars · Kia Optima · 2024

2024 Kia Optima. Advanced data.

The raw numbers: engines, recall campaign numbers, failure mileage and manufacturer communications.

Lemon Index68100 = average car
Complaints31NHTSA, first 3 years
Sold46,311U.S. model year
Per 100K sold67complaints

Engines and drivetrains 3

EngineTransmissionDriveCity / hwy / combinedFuelFuel cost/yr
1.6L 4-cyl turboAuto (S8)FWD27 / 37 / 31Regular$2,000
1.6L 4-cyl turboAuto (S8)AWD25 / 33 / 28Regular$2,200
2.5L 4-cyl turboAuto (AM-S8)FWD24 / 32 / 27Regular$2,300

EPA test versions for this model year. Fuel cost is the EPA's current estimate, not the price in that year.

Failure mileage by system

Half of owners who gave a mileage reported the problem between 6,900 and 29,000 miles. Median 12,800, from 5 complaints with a mileage.

Mileage owners typed into their NHTSA complaint, all complaints for this model year. People report some problems late, so read it as a range.

Complaints by system

SystemShare of complaints
Engine29%
Body structure23%
Electrical19%
Automatic emergency braking13%
Transmission & drivetrain10%

One complaint can name more than one system, so shares can add to more than 100%.

Severity, all complaints

TotalCrashesFiresInjuriesDeathsTows
3110101

As reported by owners to NHTSA. Not verified.

Recall campaigns 2

  • 25V794000 Nov 2025 Fuel System, Gasoline

    Defect. Kia America, Inc. (Kia) is recalling certain 2021-2024 K5 vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exhaust components, melting the tank.

    Risk. A melted fuel tank can leak, increasing the risk of a fire.

    Remedy. Dealers will replace the check valve. The fuel tank will be inspected for damage and replaced as necessary. All repairs will be performed free of charge. Owner notification letters were mailed January 16, 2026. Owners may contact Kia customer service at 800-333-4542. Kia's number for this recall is SC356. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov

  • 25V493000 Jul 2025 Structure / Body / Roof And Pillars

    Defect. Kia America, Inc. (Kia) is recalling certain 2023-2025 K5 vehicles. The left and right rear window trim pieces may loosen and detach.

    Risk. Detached trim pieces can create a road hazard for other vehicles, increasing the risk of a crash.

    Remedy. Dealers will inspect and replace the C-pillar trim assemblies, as necessary, free of charge. Owner notification letters were mailed November 19, 2025. Owners may contact Kia customer service at 800-333-4542. Kia's number for this recall is SC346.

Manufacturer communications 44

Kia filed 44 service communications for this car with NHTSA.

  • TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been…
  • Technical service bulletin: itm replacement and ecm logic improvement (ca2511) - this bulletin…
  • Voluntary emissions service campaign: fuel tank and/or pcsv check valve inspection/replacement…

Crash ratings by version

VersionOverallFrontSideRollover
Kia K5 4 DR AWD★★★★★★★★★☆★★★★★★★★★☆
Kia K5 4 DR FWD★★★★★★★★★☆★★★★★★★★★☆

Safety equipment

Electronic stabilityForward collision warningLane departure warning
StandardStandard & OptionalStandard

Nearby model years

YearLemon IndexComplaintsSoldTop system
2021928292,342Electrical
202211210066,298Fuel or ev drive system
202313510864,772Fuel or ev drive system
2024683146,311Engine
20251205372,751Tires

Sources: NHTSA complaints, recalls, investigations and manufacturer communications; EPA fuel economy data; YouTube video titles. Complaints are owner reports, not proof of a defect.

Updated

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