Used Tesla Model 3/Y HomeLink Garage Door Opener (part # 1114984-00-B) Parting out my Model Y.
Tesla Service will not typically install the part if the box is opened. However, the following thread documents a means of performing do-it-yourself install: DiY HomeLink Install using in car Service Mode - No need for Tesla Service or ToolBox
And FYI an older thread describing an approach where folks installed themselves and then were able to get Tesla Service to enable the config (YMMV): Homelink DiY Install
$150 + shipping
Tesla Service will not typically install the part if the box is opened. However, the following thread documents a means of performing do-it-yourself install: DiY HomeLink Install using in car Service Mode - No need for Tesla Service or ToolBox
And FYI an older thread describing an approach where folks installed themselves and then were able to get Tesla Service to enable the config (YMMV): Homelink DiY Install
$150 + shipping