Find Kia Optima Purge Valve Replacement Cost & Kia Optima Vapor Canister Purge Solenoids. Explore Kia Optima Evap Canister Vent Solenoid. Maintaining the vapor canister purge solenoid in your Kia Optima is crucial for preventing fuel vapor build-up and protecting the environment. Regular inspections can reveal signs of wear such as rough idling or difficulty starting, indicating a need for replacement. To extend its life, ensure your car?s fuel system is free from contaminants and replace the filter regularly. When shopping online for a new solenoid, select OEM-grade or aftermarket options designed for compatibility with your Optima's specifications. High-quality materials and correct installation are key to ensuring the new solenoid functions effectively, keeping your Optima running smoothly and efficiently.