Do these mount using the factory bolt points?

Yes. These assemblies use OEM mounting locations in the door frame. No drilling or custom brackets needed.

Do I need to remove the door panel to install this?

Door panel removal is required to access the mounting hardware and disconnect the electrical connector from the old unit. Plan for basic hand tools and a panel removal tool to avoid cracking trim.

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

Check that the regulator tracks align properly with the glass channel and that all mounting bolts are tight. Glass binding usually means the door frame is slightly bent or the assembly wasn't seated fully—test-fit before final tightening.