Does this mirror mount at factory holes?

Yes. This assembly uses the factory mounting points on the door — no drilling required. Bolt straight in using existing hardware locations.

What if the power function fails — can I still use the mirror?

Absolutely. The manual override lets you adjust the mirror by hand if the motor quits or you're parked and don't need power operation.

Will this mirror interfere with the door when it extends?

The extension is designed to clear the door panel without binding. Test the full travel range before committing to regular towing use, especially if your door has non-OEM trim or guards installed.