Using your K&N air filter is a breeze. First, make sure your vehicle's engine is turned off. Open the factory air box and carefully remove the old air filter. Then, place the K&N replacement filter in the same spot as the old one. Close the air box, and you're good to go. As for maintenance, check the filter regularly. If it looks dirty, it's time to clean it. Use a K&N filter cleaning kit to wash the filter gently. Rinse it thoroughly and let it dry completely before applying the K&N filter oil. Make sure to follow the instructions on the cleaning kit. Also, always double - check that the filter is properly installed to avoid any air leaks. And remember, this filter is designed to last a long time, but following these steps will keep it performing at its best.