A remote garage door opener module for after-market assembly into a vehicle for transmitting signals to a garage door opener includes a bezel positionable against a headliner of the vehicle along an interior surface thereof in a position over a hole in the headliner. The module further includes a housing enclosing a power source and electronic circuitry for transmitting the signals. The housing extends away from a first side of the bezel and is positionable at least partially through the hole in the headliner. The module further includes a button exposed at a second side of the bezel and coupled to the electronic circuitry and a mounting element selectively engageable with the headliner adjacent the hole and coupled with one of the housing or the bezel for coupling the module with the headliner.