There are 4 stored owner reports matching the brakes leading-label group for the 2021 Kia K5 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 4 of 4 matching reports.
Open the full vehicle complaint log (all categories)Please review Kia Costumer Care case number [XXX] date 2/20/2025 @ 4pm New York time. Brake pads worn out ,easily broken and rusty. ??? Kia Company material defect or car dealership scam. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I purchased the vehicle on 01/08/2024, less than 14 days later, the brake booster needs repair; it’s currently making a hissing now as the air is leaking out and as a result, my brakes are not working properly.
In this car, when braking or using the adaptive cruise control, the car shakes a lot, making yo lose control of the vehicle.
My vehicle is a 2021 Kia K5 GT (2.5L-T), mechanically identical to Hyundai Sonata N-Line (2.5L-T). My car has 24000 miles on it and I have replaced the rotors on my car five times now due to premature warping. KIA OEM rotors, R1 Concepts, Brakenetic Rotors, all have warped. This issue is discussed amongst GT and N-Line owners heavily in the forums stating how the OEM Brake system has some sort of issue that causes premature rotor warp. Some have even resorted to changing their brake system to a old model Cadillac CTS-V system because of how crap these brakes are. Again after less than 2 months with new rotors, they have warped yet again.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.