Disclosed is a remote starter system for remotely starting an engine of a vehicle. The remote starter system may comprise an integrated universal bypass module that allows the remote starter system to be utilized with vehicles equipped with a passive anti-theft system such as a transponder-based vehicle security system or a resistance-based vehicle security system. Alternatively, the remote starter system may comprise a kit comprising a remote starter system for remotely starting an engine of a vehicle and a universal bypass module that allows the remote starter system to be utilized with vehicles equipped with an anti-theft system such as a transponder-based vehicle security system or a resistance-based vehicle security system.