Purchase Subaru Forester Purge Valve Replacement Cost & Subaru Forester Vapor Canister Purge Solenoid. Browse Subaru Forester Vapor Canister Purge Solenoids. Maintaining your Subaru Forester's vapor canister purge solenoid is crucial for optimal performance, ensuring harmful vapors are properly filtered from the fuel system. To extend its lifespan, regularly check for signs of wear, such as difficulty starting the engine or a decrease in fuel efficiency, which may indicate a replacement is needed. When selecting a new solenoid, opt for OEM-grade materials for longevity and seamless integration. Installation is straightforward, but always adhere to the manufacturer's guidelines to ensure proper function. With a range of solenoids available, choose one that matches your Forester's specifications to maintain its eco-friendly operation.