Replace Nissan Altima Evap. Purchase Nissan Altima Evap Emission System Leak & Nissan Altima Evap Emission System. Explore Nissan Altima Evap System Components. Maintaining the Evap system in your Nissan Altima is crucial for preventing fuel vapor leaks and ensuring optimal performance. Regularly check for cracked hoses and replace the gas cap if it shows signs of wear, as these are common indicators that your Evap might need attention. When choosing a replacement, consider OEM-quality canisters for their seamless compatibility and enhanced durability. The right Evap system not only curbs emissions but can also improve fuel economy. For installation, ensure all connections are secure and use high-grade materials to extend the lifespan of your system, making your purchase a valuable investment in your Nissan's health. Shop with us for reliable Evap solutions and drive with confidence.