How to Replace an Audi G28 Engine Speed Sensor Charles the Humble Technician teaches how to replace the G28 Engine Speed Sensor. The sensor is located near the transmission's edge, above the flywheel gear. It sends a message to the ECU via a grey wire T55/49, then to the tachometer https://g28carkeys96202.blogzet.com/audi-advanced-key-strategies-from-the-top-in-the-business-44826589