There are 2 stored owner reports matching the brakes leading-label group for the 2021 Hyundai Kona 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 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)I have already replaced the transmission out of pocket 7k its began to do the same thing immediately was flushed a 2nd time and told it could be the motor. Also my battery i have bought 2 new batteries in 2 yrs now to find out its a false warning.
The braking system malfunctioned. Son was driving it, brake light came on, brakes started sinking randomly. Vehicle is very slow to get vehicle to stop and had to hit brake pedal hard to even get vehicle to slow down. Opened the hood to verify if there was brake fluid, it was low. Put brake fluid in and tested brakes, a pinhole was spraying brake fluid. Took to get a diagnostic of the vehicle. In addition to the pinhole leak, diagnostics showed that where the brake lines attach there is a leak at two of the components/areas, and told the vehicle would need new brake lines. We did not repair it at the place that performed the diagnostic. We are towing it to a Hyundai Dealership for inspection this week 3/21/2024. We have spoken to Corporate and were given a case number. No other inspections have taken place. Brake warning light came on last week. Malfunctioning brakes are a safety risk for everyone.
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.