Directed BP1 Transponder Interface ModuleDirected BP1 Transponder Interface Module The BP1 learns the vehicle as a true authorized key. Using DirectLinkDT and the DKPROG tool, simply follow the flash program steps. During a remote start attempt, the BP1 presents key data to the vehicle exactly like a factory smart key would. General Features: No need for customers to give up a key No alignment or placement issues like with key wraps No IMMO line interrupts or risk to smart key antenna wiring