Using your K&N air filter is easy. First, locate your vehicle's factory air box. Open it up, remove the old air filter, and then simply drop in the new K&N filter. Make sure it fits snugly in place and then close the air box. When it comes to maintenance, the K&N filter is washable and reusable. Every so often, check the filter for dirt and debris. If it looks dirty, you can wash it using a K&N filter cleaning kit. Just follow the instructions on the kit. After washing, let it dry completely and then re - oil it according to the kit's guidelines. As for precautions, always make sure the engine is off before you remove or install the filter. Also, keep the filter away from sharp objects that could damage it. With proper use and maintenance, your K&N air filter will serve you well for a long time.