The Motronic family evolved from simple fuel injection controllers into complex systems that manage ignition timing, knock detection, emissions, and variable valve timing. Because the hardware changed significantly over the decades, the pinout for a 1985 BMW (Motronic 1.1) is vastly different from a 2005 Volkswagen (Motronic ME7). Early Motronic Systems (1.1, 1.3, and 1.7)