It is very easy. You can purchase the rearview mirror with homelink in it from any Toyota dealer. The part number is pt-374-34070 I installed this on 2007 Tundra sr5. You will have to remove the six screws that hold the overhead console in and the wiring for the mirror is already installed under the console. The mirror is a plug and play item and takes about 20 minutes to install. I purchased mine for 225.00 from a toyota dealer. You will have to calibrate the compass on the mirror and set the zone but it comes with instructions.