hi just thought I would like to inform all users of A4 b9 2021, that my ecu got cooked due to a harness from bonnet side to cab had been stretched/chafed from the factory. resulting in 2 wires loosing voltage and spiked ecu. garage got a new ecu sent from Germany to Uk . what the spike to ecu done as well is the high pressure diesel sensor on front of rail and the erg sensor.