Will this bolt directly to my existing door panel or does it need modification?

Mounts at the factory mounting points on your window frame. No drilling or frame modification required—unbolt the old unit and bolt this one in place.

Is the motor included or do I need to buy that separately?

Motor is part of this assembly. You get the complete motor-and-regulator unit in one box, ready to install.

What if the window doesn't operate smoothly after installation?

This assembly was tested before shipping. If you encounter issues post-install, verify the electrical connector is fully seated and the regulator tracks are clear of debris. If the motor still doesn't respond, contact support with photos of your setup.