There are 2 owner-reported speed control & cruise complaints for the 2004 Kia Optimain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
WHILE DRIVING ON A HIGHWAY WITH CRUISE CONTROL ACTIVE, I WAS UNABLE TO TURN OFF THE CRUISE CONTROL WITH THE STEERING WHEEL CONTROL BUTTONS. THE CANCEL AND SET BUTTONS HAD NO EFFECT WHEN PRESSED. THE CAR REMAINED TRAVELING AT THE SET SPEED. TAPPING ON THE BRAKE PEDAL DID CANCEL THE CRUISE CONTROL.
TL*THE CONTACT OWNS A 2004 KIA OPTIMA. THE CONTACT STATED WHILE DRIVING 30 MPH WITH THE BRAKES ENGAGED THE VEHICLE ACCELERATED AND CRASHED INTO SOME TREES. THE VEHICLE WAS DESTROYED. NO ONE WAS INJURED. THE CONTACT DID NOT CALL THE MANUFACTURER. THE CONTACT STATED THAT THE VEHICLE HAD ALWAYS BEEN UNSAFE TO DRIVE. THE FAILURE MILEAGE WAS 40,000.
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.
Data synced from NHTSA on Apr 25, 2026