Does this come with the mirror backing or just the glass?

Just the glass lens assembly. Your existing mirror backing and motor stay in place—this slides in to replace the damaged or worn glass.

Will the heated element work with my vehicle's existing controls?

Yes. The heating function integrates with your factory rear defrost button and control system—no rewiring needed.

What do I need to remove to install this?

Access varies by trim level. You may need to remove interior panels or the mirror assembly backing plate depending on your Sonic's configuration—check your service manual for your specific year and door panel setup before starting.