The Lane Check

CarsKia › Optima › 2015

2015 Kia Optima: engine and transmission complaints

VERY HIGH COMPLAINT SIGNAL
69%
667 of 967 relevant owner complaints are about the engine, transmission or fuel system

69% of relevant owner complaints filed with NHTSA on the 2015 Kia Optima are about the engine, transmission or fuel system. Well over half of everything owners reported is the drivetrain. That is a severe model-level pattern; every model year we track at this level has a documented failure behind it.

Worse than 91% of the 1,230 model years we track (2010–2023).

Excludes 40 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 66%).

NHTSA data checked September 13, 2026
Share this car

Looking at a specific Optima?Check its VIN: the full report, quotes about its own engine, and whether its recalls are still open. First report free.

Check a VIN
Drivetrain complaints
667
engine, transmission, fuel
Total complaints
1,007
this model year
Fires reported
74
owner-reported
Recall campaigns
4
31 crashes · 23 injuries

Complaints by component

ENGINE621 · 62%
UNKNOWN OR OTHER139 · 14%
ELECTRICAL SYSTEM135 · 13%
SERVICE BRAKES89 · 9%
STRUCTURE76 · 8%
STEERING69 · 7%

The years either side

2010
63%
36 of 75
2011
59%
287 of 593
2012
55%
471 of 919
2013
56%
721 of 1,381
2014
59%
325 of 583
2015
69%
667 of 1,007
2016
70%
489 of 754
2017
78%
181 of 255
2018
76%
159 of 232
2019
54%
102 of 206
2020
84%
113 of 144
2021
no data
2022
no data
2023
no data

Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.

Cleaner alternatives

Other midsize sedans with no elevated signal in 2015

The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.

What owners reported

ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM12/09/2024CRASH2 INJURED
DURING COVID 19 PANDEMIC GRIEVIANCE DEPRESION HOMELESSNESS RACISM CRITICISM HATE CYBERBULLY ATTACK I LIVE IN MY 2015 KIA OPTIMA I HAD [XXX] I HAD TBONE ACCIDENT IAM NOT FAULT FOR I HAVE ALL STATE INSURANCE I NEVER GET HELPED COMPENSATED THEY CLOSED MY CLAIMS I HAD MULTPLE CITATIONS 13 IN EL CAJON 4 IN SAN DIEGO 4 3 H…
AIR BAGS,ENGINE,FUEL/PROPULSION SYSTEM01/13/2023CRASH2 INJURED
I purchased a kia turbo optima from bob's lamphere's beaverton oregon kia dealership 9 days later I felt the acceleration awkwardly bi wanted to return it or exchange but was told no contract was only within 5 days. I took it to kia dealership for diagnostic 3 times I had it for 9 months the last 6 weeks was the 3rd ti…
SUSPENSION,SERVICE BRAKES,ENGINE11/05/2020CRASH2 INJURED
TRYING TO AVOID ANOTHER VEHICLE APPROACHING ME IN A HEAD ON COLLISION, MY ENGINE BEGAN TO STALL, BRAKES LOCKED UP WHICH CAUSED SUSPENSION ISSUES OF THE VEHICLE. DUE TO THIS, THE VEHICLE WAS COMPLETELY TOTALED AND GLOBAL LENDING SERVICES IS CONSISTENTLY REPORTING IT AS A REPOSSESSION. BOTH VEHICLES WERE IN MOTION AND IT…

Three of 667 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.

Recall campaigns on this model year (4)

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 rec…
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), …
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 H…

This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.

Before you buy a 2015 Kia Optima

Have the VIN?Paste it and get the full report for that car. First report free, then a 30-day pass covers a whole car search.

Check a VIN

Experimental model-level information. This is not a vehicle inspection, vehicle-history report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition of any individual vehicle.