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 situated near the transmission's edge over the flywheel gear. It transmits a signal the ECU via a grey wire (T55/49) and then to the tachometer https://g28carkeysolutions93683.madmouseblog.com/10329982/the-most-powerful-sources-of-inspiration-of-audi-a1-key