Will this plug directly into my factory mirror controls?

Yes. This lens connects to the stock heated mirror switch—no wiring or relay work required. Power flows through your existing mirror connector.

Do I need to remove the entire mirror assembly to install this?

You'll need to access the mirror housing to swap the glass lens. The mounting hardware stays in place; only the lens element itself is replaced.

What if the heating element doesn't work after installation?

Test your factory heated mirror switch first—confirm power reaches the mirror. If the switch activates but the lens doesn't warm, the heating circuit may have an issue independent of this lens.