[A4] Lights mean bad module?

[Guitar/Mcqueen]

   I had the same symtoms on my '98 A4 avant.  VAG-Com indicated it 
was a bad left rear wheel  speed sensor.  Sure enough, a bad wheel 
bearing had allowed the sensor ring to saw through the end of the 
sensor. Salt from NH winter roads can wreak havoc on the wheel 
bearings when it gets past the seals.

              Gordon