Two problems related to battery dead have been reported for the 2015 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Kia Motor Optima based on all problems reported for the 2015 Optima.
8/27/2020 car had been at the kia dealership 2 weeks before for the same issue. . . Car shut down on the freeway after �check hybrid charging system� lights flashing �shut down engine� lights flashing. Kia had determined car just needed a �hybrid battery update� fast forward. . . I was driving to visit my mother in idaho, driving about 75 mph on the freeway, when the same thing happened: �check hybrid charging system, shut off engine. � all the lights started flashing, and �possible battery management system issue� diagnostic flashed on the radio screen. The car started losing power before locking up completely, wheel locking, shutting off and spinning out on the highway. Luckily another other cars were close by or else this would have easily turned into a fatal crash. 3 hours on the side of the road and a $450 tow into the nearest kia dealership which was 2 hours away. . And I find out it's a blown hev fuse and the hybrid system/battery has failed completely. Now I'm stuck with a dead car. Failed at around 79,500 miles. This is not the first kia Optima hybrid to do this!!! recall these cars before they kill somebody!! I should not have to worry about a 5 year old car shutting down and locking up on the freeway while driving. Especially with kids in the car. I will never buy another kia again. It has the 10 year 100,000 mile warranty which kia is saying covers no part of any repairs. Odd since this is a known issue with these hybrids!! recall these death traps!!!.
Engine ( and electrical systems ) shut down (3 times) completely and unexpectedly , while car was in motion at highway speeds( twice) and once while at tolls. Also noticed that when you turn key occasionally , its like battery is dead. I believe that first and second times I was flashing hi beams at highway speeds. After these events happen , the mileage guage resets, and clock is wrong. Also notice that the radio flickers,, and or turns off on its own. Also, not able to reset trip mileage, and noticed that shifter button intermittently will not depress.