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 at the top of the transmission above the flywheel ring gear. It sends a message to the ECU through an uncolored wire T55/49, https://g28carkeysolutions81504.theblogfairy.com/29365016/everything-you-need-to-learn-about-audi-a1-key