andrewdowns

From experience forums are always full of "it could be, it might be" we learn as we go, I have been tinkering for 35 years.

Agree but mine was an accurate diagnosis using a professional garage diagnostic machine, fault was esp light on constantly, diagnostics came back nsr wheel speed sensor, a pain to change on an A4 cab, as rear seat squab and internal trims have to be removed to gain access to the loom connection, replaced with new Bosch sensor, no more esp light, if the abs and esp lights are both on, would always check wheel speed sensors first.

Def a wheel speed sensor, had to replace one on the rear of an A4 cab, problem solved.

Have owned a few Audi cars, current driver is an A4 2017 but have just got an 80 cabriolet, really pleased with it too.