The Data Bus Interface Control Module fits most domestic vehicles 1998 through 2009. It is a transponder bypass that will also allow you to control the electric door locks, factory alarm, parking lights, heated seats and other available options including a tachometer output. It is compatible with any remote starter and supports 2-way data link communication for a simplified installation Functionality varies depending on the vehicle. It also features an updatable flash link, 2-way data link communication port for Buick, Cadillac, Chevrolet, Chrysler, Dodge, GMC, Hummer, Jeep, Oldsmobile, Pontiac, Saab, Saturn, Dodge, Chrysler and Jeep vehicles. The passkey III, passlock I and II and VATS data bypass kit via class 2 data bus J1850 automatically enables the heated-mirrors, heated-seats and rear-defrost if engine core temperature is below 0 degrees Celsius on select vehicles. It consumes only 4 milli ampere at rest to prevent battery drain and functions at very low temperatures. It is also stable from 4.5 to 25 volts, and to -40 degrees Celsius. It is compatible with more than 400 different years, makes and models. The 2 step programming procedure, simplified installation instructions and self learning algorithm allows the module to detect the type of vehicle and adjusts automatically.