Using this Injen cold air intake is straightforward. First, make sure your engine is off and cool. Locate the existing air intake system in your 2004 - 2006 Toyota Matrix XRS and carefully remove it. Then, install the new Injen intake following the included instructions. Once installed, start your engine and enjoy the improved performance. As for maintenance, regularly check the SuperNano - Web dry air filter. If it looks dirty, it can be serviced. You can gently clean it according to the filter's cleaning guidelines. Also, keep an eye on the intake tube for any signs of damage or loose connections. If you notice any issues, it's best to address them right away to keep your intake working at its best. And remember, this intake comes with a limited lifetime warranty, so if you have any major problems, reach out to Injen Technology.