How to Replace an Audi G28 Engine Speed Sensor Charles the Humble Technician shows you how to replace the G28 Engine Speed Sensor. This sensor is located on the outside of the transmission, above the flywheel gear. It transmits a signal to the ECU via the grey wire (T55/49), then https://g2851229.total-blog.com/5-lessons-you-can-learn-from-audi-a1-key-55103659