Using the K&N air filter is easy. First, find your vehicle's factory air box. Open it up and take out the old air filter. Then, simply drop the K&N filter into the air box. Make sure it fits snugly. Close the air box, and you're good to go. As for maintenance, you can wash the filter when it gets dirty. Just use a mild cleaner and rinse it gently. Let it dry completely before oiling it with K&N filter oil. Don't over - oil it. Remember to check the filter regularly, especially if you drive in dusty or dirty conditions. This will keep your engine running smoothly and help you get the most out of your filter and your vehicle.