Using your K&N air filter is a breeze. First, make sure your engine is off. Then, simply remove the old air filter from your factory air box and drop in the new K&N filter. It's designed to fit perfectly. As for maintenance, you don't need to replace it often. Just wash it when it gets dirty. You can use a K&N cleaning kit for the best results. After washing, let it dry completely and re - oil it according to the kit's instructions. Remember to check your vehicle's manual for any specific instructions related to your car model. Also, avoid using harsh chemicals on the filter as it can damage the media. With proper care, this filter will serve you well for the life of your vehicle.