P0303 on Kia vehicles
33 owner complaints filed with NHTSA about Kia vehicles mention P0303 (Cylinder 3 Misfire Detected) - across 6 models. Below is where it shows up, by model and year.
Can you drive with it? Short careful trips only, and only while the check engine light is steady. A FLASHING light means stop - raw fuel is overheating the catalytic converter, and a glowing converter is a fire risk.
Symptoms, likely causes in order and realistic repair costs are on the main P0303 page - they do not differ much by brand. This page shows what is specific to Kia: which models and years actually report it.
Kia models reporting P0303
The number next to each year is how many NHTSA complaints for that car mention P0303. Owners rarely quote trouble codes when complaining, so real occurrence is many times higher - use these numbers to compare years, not as totals.
P0303 on other makes
Makes with enough NHTSA reports of P0303 for their own page.
Counts are NHTSA owner complaints whose text mentions P0303 - owner-reported and unverified. Always confirm with a diagnosis of your specific vehicle.