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NHTSA-Verified · Common Problems

2016 Kia Optima
Common Problems

Ranked from 297 federal NHTSA complaints and 1 recalls. Every problem links to the complaint IDs behind it.

2
Safety
5
High severity
9
Medium
5
Low
2 problems on this vehicle involve a crash, fire, or injury risk. If you are experiencing one, stop driving and have it inspected.

21 Common Problems

Ordered by how often owners reported each one to NHTSA. The bar shows how common a problem is relative to the most-reported on this vehicle. Expand any problem to see the federal complaint IDs.

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  1. 1

    Check Engine Light and Warning Lights

    218complaints
    Safety riskEngine

    The check engine light and various warning lights illuminate, indicating potential engine or electrical system issues.

    $100–$250est. professional diagnosis · 1–2 hrs labor
    Get local quotes
  2. 2

    Engine Burning Excessive Oil

    38complaints
    High severityEngine

    The engine burns excessive amounts of oil, leading to frequent oil changes and potential engine damage.

  3. 3

    Excessive Oil Consumption

    16complaints
    High severityEngine

    The engine consumes an excessive amount of oil, requiring frequent refills.

    $400–$4,500est. oil-consumption repair (rings/pcv) · 3–14 hrs labor
    Get local quotes
  4. 4

    Power Window Malfunction

    12complaints
    Low severityOther

    Power windows fail to operate properly, often dropping on their own or not moving up or down.

    $250–$600est. window regulator replacement · 1–2.5 hrs labor
    Get local quotes
  5. 5

    Window Malfunction

    10complaints
    Low severityElectrical

    Windows fail to operate properly, often due to electrical system failures or regulator malfunctions.

  6. 6

    Fuel System Issues Leading to Poor Performance

    8complaints
    Medium severityFuel system

    The fuel system causes poor performance, including stalling and random loss of power.

    Related recall: 18V907000

  7. 7

    Engine Misfire Due to Knock Sensor Issues

    6complaints
    High severityEngine

    The engine misfires and enters limp mode due to faulty knock sensors.

    $200–$900est. ignition service (coils/plugs) · 1–4 hrs labor
    Get local quotes
  8. 8

    Engine Knocking and Vibration

    5complaints
    Medium severityEngine

    The engine produces a knocking sound and exhibits significant vibrations during operation.

  9. 9

    Engine Misfire and Random Stalling

    5complaints
    Medium severityEngine

    The engine misfires and stalls randomly, often without warning, affecting vehicle reliability.

    $200–$900est. ignition service (coils/plugs) · 1–4 hrs labor
    Get local quotes
  10. 10

    Window Regulator Failure

    5complaints
    Medium severityElectrical

    Multiple window regulators fail, causing windows to become inoperable and posing a safety risk.

    $250–$600est. window regulator replacement · 1–2.5 hrs labor
    Get local quotes
  11. 11

    Engine Misfire and Power Loss

    4complaints
    High severityEngine

    The engine misfires and experiences power loss, often without warning lights, leading to dangerous situations.

    $200–$900est. ignition service (coils/plugs) · 1–4 hrs labor
    Get local quotes
  12. 12

    Window Regulator Failures

    4complaints
    Low severityOther

    Multiple instances of window regulators failing, causing windows to not function properly.

    $250–$600est. window regulator replacement · 1–2.5 hrs labor
    Get local quotes
  13. 13

    Abnormal Engine Knocking and Vibrations

    3complaints
    Medium severityEngine

    The engine produces abnormal knocking sounds and vibrations, indicating potential internal engine issues.

  14. 14

    Dashboard and Airbag Issues

    3complaints
    Low severityOther

    Dash cracks and airbag issues appear to be cosmetic and non-functional, though they may indicate underlying problems.

  15. 15

    Engine Knocking and Seizure

    3complaints
    High severityEngine

    The engine produces a knocking sound and eventually seizes, requiring immediate repair or replacement.

  16. 16

    Engine Knocking Noise and Power Loss

    3complaints
    Medium severityEngine

    The engine produces a knocking noise and experiences a loss of power, often without warning lights.

    $150–$1,200est. stalling / shutdown diagnosis + repair · 1–5 hrs labor
    Get local quotes
  17. 17

    Engine Stalling and Check Engine Light

    3complaints
    Medium severityEngine

    The engine frequently stalls and the check engine light illuminates, often requiring engine replacement.

    $150–$1,200est. stalling / shutdown diagnosis + repair · 1–5 hrs labor
    Get local quotes
  18. 18

    Steering Malfunction

    3complaints
    Medium severitySteering

    The power steering system malfunctions, causing the steering to lock up and making the vehicle difficult to control.

  19. 19

    Engine Failure and Limp Mode

    2complaints
    Safety riskEngine

    The engine fails and enters limp mode, causing the vehicle to lose power and stall, posing a safety risk.

    $4,000–$8,000est. engine replacement · 12–20 hrs labor
    Get local quotes
  20. 20

    High Oil Consumption and Misfires

    2complaints
    Medium severityEngine

    The engine consumes excessive oil and experiences misfires, leading to a check engine light and reduced performance.

    $400–$4,500est. oil-consumption repair (rings/pcv) · 3–14 hrs labor
    Get local quotes
  21. 21

    Trunk Latch Failure

    2complaints
    Low severityOther

    The trunk latch fails, causing the trunk to open unexpectedly while driving.

Other years & sources

2010 Kia Optima2017 Kia Optima2018 Kia Optima2019 Kia Optima2020 Kia OptimaAll NHTSA complaints for this vehicle →

Data source: U.S. National Highway Traffic Safety Administration (NHTSA) owner complaints and recalls. Problems are clustered and ranked from the complaint record; occurrence counts reflect corroborating complaints, not total incidence. Vehicle image is illustrative. Repair-cost figures are typical U.S. independent-shop ranges (parts + labor) for the class of repair shown — actual quotes vary by region, engine, and diagnosis; always confirm with a local shop.