The Kia Optima Engine Recall affects hundreds of thousands of vehicles due to a manufacturing defect that can cause engine failure or fire. Owners should first verify their VIN at nhtsa.gov, then watch for warning signs like knocking noises or oil pressure alerts. If affected, schedule a free repair at an authorized Kia dealership and request a loaner vehicle if needed. Keep all documentation — receipts, service records, and communications — in case further action is required. If the dealer is unresponsive, file a complaint with the NHTSA. Acting quickly protects both your safety and your rights as a vehicle owner.