How to Replace an Audi G28 Engine Speed Sensor Charles the Humble Technician teaches how to replace the G28 Engine Speed Sensor. This sensor is located on the edge of the transmission above the flywheel ring gear. It sends a signal to the ECU via an uncolored wire (T55/49), then https://carlocksmiths64375.tinyblogging.com/what-audi-advanced-key-is-your-next-big-obsession-73934373