Diagsheet

Model year 2015

2015 Kia Optima

  • 1,005owner complaints
  • 4recalls
  • 31involved a crash
  • 80,000median miles at failure

Newest report Aug 24, 2026 · checked Sep 9, 2026

miles

When each problem shows up

Each bar covers the middle half of the mileages owners reported for that problem. A quarter saw it earlier, a quarter later. The tick is the median. Most reported: engine failure, knocking or rod bearing, 318 complaints.

0k25k50k75k100k125k150kyou
Steering sticks, feels notchy or jerks21 reports
Airbag warning light or recall26 reports
Burns oil or oil level rises37 reports
Infotainment, screen or backup camera fails11 reports
Engine stalls or loses power while driving256 reports
Battery dies or the car will not start30 reports
Engine failure, knocking or rod bearing318 reports
Power steering cuts out or goes heavy13 reports
Brakes grind, pulse or wear early89 reports
Vehicle fire70 reports
Multiple warning lights come on at once22 reports
Check engine light or misfire108 reports
Paint peels or body rusts56 reports
too few reports state a mileage

middle half of reports, median tick. Darker bars have 75 or more reports.

Behind you

    Around your mileage

      Ahead of you

        How this compares

        2015 Kia Optima1,005
        Median 2015 model here (104 vehicles)274
        Median 2015 sedan here (31)268

        1,005 complaints is 3.7 times the median 2015 model on this site and 3.8 times the median 2015 sedan. Among the 7 Optima model years here it ranks 1st for complaints. Counts follow sales volume as much as reliability, so a truck that sells 700,000 a year draws more reports than a sedan that sells 200,000.

        Complaints filed by year

        1615
        2216
        4117
        6418
        10819
        9920
        8321
        13622
        15923
        11824
        11125
        4826

        159 complaints came in 2023. Owners file in waves when a problem gets press or an investigation, so a spike measures attention as much as failures.

        NHTSA investigations

        AQ23-002opened Nov 17, 2023
        Service Brakes, Hydraulic · model years 2011 to 2015

        Hyundai and kia abs module fires. Open.

        NHTSA summary
        The Office of Defects Investigation (ODI) has received eight Hyundai Motor America (Hyundai) and eight Kia America, Inc. (Kia) Part 573 Recall Reports between 2016 and 2023. The combined 16 safety recalls all involve the antilock braking system (ABS) modules or Hydraulic Electronic Control Units (HECU) manufactured by the equipment supplier Mando. The Part 573 Recall Reports contain varying defect descriptions and differing remedy descriptions for the same or similar equipment supplied by Mando. Safety recalls included in this Audit Query (AQ) review include: Hyundai recalls 20V-520, 20V-543, 21V-161, 21V-160, 21V-303, 22V-056, 22V-810, and 23V-651. Kia recalls 16V-815, 20V-518, 20V-519, 21V-137, 21V-331, 22V-051, 22V-800, and 23V-652 The purpose of this AQ is to evaluate the timeliness and scoping of Hyundai and Kia’s defect decision making and adherence with reporting requirements; and understand the varying defect descriptions and remedies between these recalls.
        DP22-003opened Sep 12, 2022
        Engine · model years 2005 to 2020

        Loss of motive power. Closed dec 12, 2023.

        NHTSA summary
        The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021. The Petitioners cited examples of complaints indicating that the subject vehicles were experiencing rapid loss of engine oil due to oil drain plug back outs, resulting in loss of motive power and/or catastrophic engine damage. Additional complaints were provided which alleged that the oil drain pans lack sufficient structural integrity and are susceptible to cracking. The petition itself can be reviewed at NHTSA.gov under ODI number 11481745. On September 12, 2022, the Office of Defects Investigation (ODI) opened Defect Petition (DP22-003) to evaluate the Petitioners’ request. The Petitioners have provided additional complaints within four supplemental letters dated January 31, 2023, March 21, 2023, May 23, 2023, and August 4, 2023. ODI’s evaluation included the review and analysis of the complaints and supporting information submitted by the Petitioners, as well as additional complaints submitted directly to NHTSA which referenced either the oil drain plug or a crack in the oil pan. After reviewing the available data, ODI has not identified evidence that would support opening a defect investigation into the oil drain pan as
        DP21-003opened Nov 12, 2021
        Speed control · model years 2005 to 2016

        Throttle control system vulnerabilities. Closed jun 20, 2023.

        NHTSA summary
        The Office of Defects Investigation (ODI) of the National Highway Traffic Safety Administration (NHTSA) received a petition letter dated October 10, 2021, requesting an investigation of possible defects in the electronic throttle control (ETC) system on certain Kia vehicles resulting in the opening of DP21-003. Accordingly, Model Year (MY) 2005-2016 Kia Optima/K5, MY 2006-2015 Kia Sorento, MY 2007-2016 Hyundai Elantra, MY 2007-2016 Hyundai Santa Fe, MY 2006-2015 Hyundai Sonatas are all part of the subject population. The petition was originally filed as a Vehicle Owner Questionnaire that can be reviewed at NHTSA.gov under reference (ODI) number 11439675.On November 12, 2021, ODI opened Defect Petition DP21-003 to evaluate the petitioner?s request. ODI performed trend analyses of the VOQs related to vehicle speed control issues for all the subject vehicles and found that none of the 52 Model/Model Year Hyundai/Kia vehicles demonstrated any actionable trend that warranted an investigation.Petitioners submitted 1119 VOQs and non-VOQ cases in which sudden uncommanded acceleration (SUA) or loss of motive power (LOMP) incidents were alleged.For the 1119 reports, 220 were incidents involving crashes, from which 69 subject Hyundai-Kia vehicles were inspected by Hyundai/Kia dealer technicians, Hyundai/Kia engineers, and/or third-party representatives.ODI found the inspections identified no vehicle defects related to the ETC system.Of the 220 crash-involved reports, 13 Event Data Recor
        EA19-001opened Apr 19, 2019
        Airbags · model years 2013 to 2019

        Electrical overstress. Closed sep 19, 2024, led to recall 20V-024.

        NHTSA summary
        The Office of Defects Investigation (ODI) opened this investigation to determine if the failure of airbags to deploy during severe crashes, in certain vehicles, was the result of a safety related defect. During the investigation a complex failure was studied that can result in non-deployment of subject vehicle air bags and other restraint system devices in severe crash events. The subject vehicles may be equipped with an airbag control unit (ACU) for the supplemental restraint system (SRS) Electronic Control Unit (ECU) manufactured by ZF-TRW. The ECU receives signals from crash sensors mounted in the vehicle and deploys the vehicle air bags and seat belt pretensioners in accordance with manufacturer design specifications. The ECU in the subject vehicles contains a model DS84 application-specific integrated circuit (ASIC) which controls the communication of the crash sensor signal, firing commands (i.e., when to deploy the airbag(s) and/or pretensioners), and fault information (e.g., diagnostic trouble codes). In September 2016, FCA announced recall 16V-668 for certain model year (MY) 2010 to 2014 Chrysler, Dodge and Jeep products manufactured with the subject ZF-TRW ACU. In this recall, FCA discussed an EOS condition that resulted in a failure of the subject DS84 ASIC, which caused air bag non-deployment. FCA noted that the defect condition had only been observed in vehicles equipped with sensor harnessing routed across the front of the vehicle. Other FCA vehicles

        Recalls that include the 2015 Kia Optima

        Whether your car is included depends on its VIN. Check yours at nhtsa.gov/recalls.

        23V-652Sep 25, 2023
        Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/Module

        Kia America, Inc. (Kia) is recalling certain 2010-2019 Borrego, 2014-2016 Cadenza, 2010-2013 Forte, Forte Koup, Sportage, 2015-2018 K900, 2011-2015 Optima, 2011-2013 Optima Hybrid, Soul, 2012-2017 Rio, 2011-2014 Sorento, and 2010-2011 Rondo vehicles. The Hydraulic Electronic Control Unit (HECU) may experience an electrical short, which can result in an engine compartment fire while parked or driving.

        Risk and remedy
        Risk: An engine compartment fire while parked or driving can increase the risk of injury.
        Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the HECU fuse, free of charge. Interim notification letters, notifying owners of the safety risk, were mailed November 14, 2023. Owner notification letters were mailed March 29, 2024 through June 18, 2024. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC284.
        21V-331May 10, 2021
        Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/Module

        Kia Motors America (Kia) is recalling certain 2013-2015 Optima and 2014-2015 Sorento vehicles previously recalled under recall 20V-519. Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short.

        Risk and remedy
        Risk: An electrical short in the HECU increases the risk of a fire while parked or driving.
        Remedy: Owners are advised to park outside and away from other vehicles and structures until the recall repair is completed. Dealers will install a new multi-fuse, and inspect the HECU for leaks, replacing the HECU if necessary, free of charge. Owner notification letters were mailed on July 2, 2021. This recall supersedes previous NHTSA recall number 20V-519. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC212.
        20V-519Aug 27, 2020
        Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/Module

        Kia Motors America (Kia) is recalling certain 2013-2015 Optima and 2014-2015 Sorento vehicles. Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short.

        Risk and remedy
        Risk: If the HECU short circuits, there is an increased risk of an engine compartment fire.
        Remedy: Kia will notify owners, and dealers will inspect the HECU for leaking brake fluid and replace the HECU if necessary, free of charge. Owners are advised to park outside and away from other vehicles and structures until the recall repair is completed. The recall began October 20, 2020. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC197.
        18V-907Dec 19, 2018
        Fuel System, Gasoline:Delivery:Hoses, Lines/Piping, And Fittings

        Kia Motors America (Kia) is recalling certain 2011-2017 Optima, 2012-2017 Sorento and 2011-2018 Sportage vehicles that previously received an engine replacement under recall number 17V-224, warranty, or the Knock Sensor Detection System (KSDS) Product Improvement Campaign. The high pressure fuel pipe that connects to the fuel pump outlet may have been damaged, misaligned or improperly torqued during the engine replacement procedure, possibly causing a fuel leak.

        Risk and remedy
        Risk: A fuel leak in the presence of an ignition source can increase the risk of a fire.
        Remedy: Kia has notified owners, and dealers will inspect and replace the fuel pipe, as necessary, free of charge. The recall began January 17, 2019. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC172.

        Other model years

        20145432015100520167542017255201823120192052020143