I just checked out the Homelink website about adding Homelink to a vehicle not equipped from the factory and here is what they say.
Mito website is www.mitocorp.com and Homelink is www.homelink.comMITO brings HomeLink availability to most any vehicle
Want to add HomeLink to a vehicle not on our list? Then check out the MITO Corporation Web site.
MITO offers three different self-dimming mirror options with HomeLink (see list below). Your favorite automotive dealer can order and install the product for you.
After installation and programming, opening your access gate, closing your garage door, or switching on security lighting is as simple as touching your rearview mirror.
Other features are listed below. For more information or to find a dealer near you, contact MITO Corporation at 1-800-433-6486 or visit their Web site.
MITO offers three options of the self-dimming mirror with HomeLink:
Self-dimming mirror for enhanced nighttime safety with HomeLink Wireless Control System for added convenience, efficiency, and security
Self-dimming mirror with HomeLink, PathPoint® auto-calibrating digital electronic compass, and outside temperature display
Self-dimming mirror with HomeLink, PathPoint compass, temperature readout, and map lights