There are 1 owner-reported lighting complaints for the 2001 Kia Optimain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
WHILE DRIVING AT NIGHT, THE HEADLIGHTS WOULD DIM WHENEVER THE A/C OR THE HEATER WAS TURNED ON. THE DEALER/MANUFACTURER BOTH AGREED THAT WAS THE NORMAL CHARACTERISTIC OF THAT VEHICLE. FEEL FREE TO PROVIDE ANY FURTHER INFORMATION. *JB
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