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 sends a message to the ECU through an uncolored wire T55/49, then to the tachometer https://carlocksmiths85397.bloggip.com/29881315/the-audi-a1-key-mistake-that-every-beginner-makes