Your projector needs little maintenance to keep working at its best.
You may need to clean the lens periodically, and clean the air vents to prevent the projector from overheating due to blocked ventilation.
The only parts you should replace are the remote control batteries. If any other part needs replacing, contact Epson or an authorized Epson servicer.
This projector uses a sealed laser light source which does not need servicing and cannot be replaced.