How to Replace an Audi G28 Engine Speed Sensor Charles the Humble Technician shows you how to replace the G28 Engine Speed Sensor. The sensor is located on the outside of the transmission just above the flywheel gear. It sends a message to the ECU via an uncolored wire T55/49, https://g28-car-keys26962.verybigblog.com/29403444/why-audi-advanced-key-you-ll-use-as-your-next-big-obsession