There are 2 stored owner reports matching the driver assist & adas leading-label group for the 2017 Kia Optima 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)Twice while driving in rain my front end collision warning has taken control from me and slammed on the brakes bringing my car to a full stop. There was no vehicle or object in front of me either time. The second time I narrowly missed being rear ended.
Cruise control does not maintain a steady speed and constantly fluctuates 10+- miles an hour! The dealer refuses to fix and says they cannot reproduce the symptom. I used a tracker and saw the dealer drive it around the block, never attempting to put it on the freeway.
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.