Kia K4 Engine Problems
10 owner complaints filed with NHTSA across 1 model years.
Complaints by Year
Worst year: 2025. Best year: 2025.
Owner Reports
A representative sample of complaints filed with NHTSA.
Location: Intersection of [XXX] and [XXX] Lakeville, MN Date/Time: [XXX], at approximately [XXX] Vehicle: 2025 Kia K4 (911 call placed at 10:08 am) On [XXX], while traveling toward the roundabout at [XXX] and [XXX], my vehicle experien...
The contact owns a 2025 Kia K4. The contact stated while driving at 40 MPH on several occasions, the vehicle stalled. The vehicle was able to restart but would immediately stall again, requiring the driver to wait approximately 10 minute...
The car completely cut off while driving on the highway going 65 mph. This isn’t the first time it has turned off while driving. I had to pull over and put the car in park before it would turn back on. The error says Accessory Mode. I ...
The contact owns a 2025 Kia K4. The contact stated that while driving at 75 MPH, the vehicle downshifted upon depression of the accelerator pedal, with heavy white smoke coming out of the exhaust pipe. The contact stated that the low oil...
As I entered onto i4 reaching the speed of 60 miles an hour my vehicle began to make a high pitched whining noise that got louder as I pressed on the gas pedal, noise dissipated when I let off the gas pedal. Vehicle began to slow down on...
Engine Failure, Engine cooling and lost power
Transmission failure 4 times since purchasing it new in December 2024 I was almost killed multiple times on the highway because car won’t accelerate. Car is jumping when driving and choking Air conditioning shuts off while driving...
“The engine undercover (belly pan) detached and is dragging/scraping on the ground on a 2025 Kia K4 with approximately one year of normal use. The radiator support is also affected. Dealer (Selma Kia, Selma CA) denied warranty coverage...
Sluggish acceleration, after I got an oil change a few weeks ago. No warning lights whatsoever, I’m thinking it’s the transmission , taking awhile to speed up especially on highway
Bought my Kia k4 2025 in February at DTLA Kia and the experience has been [XXX]. The first day driving I went up near dodgers stadium , immediately had a burnt smell. I disregarded it thinking maybe its fresh paint burning , WRONG. Till ...