The contact owns a 2014 Kia Optima. The contact stated while driving at 30 MPH, the check engine warning light illuminated and the vehicle stalled while driving. The contact manually pushed their vehicle to the side of the road and noticed smoke coming from the engine compartment. The contact opened the hood of the vehicle where more smoke was coming from the engine and fire coming from the passenger side of the engine. The contact ran to a nearby business to get a fire extinguisher to extinguish the fire. The contact was in process of the vehicle being towed to a local dealer. The contact concerned that NHTSA Campaign Number: 21V331000 ( service brakes, hydraulic) was related to the failure. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 80,000.