How to Replace an Audi G28 Engine Speed Sensor Charles the Humble Technician shows how to replace the G28 Engine Speed Sensor. This sensor is located near the transmission's edge just above the flywheel gear. It transmits a signal to the ECU via a grey wire (T55/49) and then to https://g28-car-keys60472.bloguetechno.com/5-qualities-that-people-are-looking-for-in-every-audi-a1-key-65490756