2013 A6 Avant Wheel Speed Sensor Issue

[Johnny1983]

I'm having a spot of bother...

It started in November when the dash lit up with various warnings about ABS, Auto Handbrake, TPMS etc. I scanned the car with Delphi and it showed three errors relating to the front left wheel speed sensor, bought one off Amazon, fitted it and had no problems till last week when the same lights came on the dash, scanned again and it showed the same three errors but relating to the front right whell speed sensor, i thought it a bit odd but i ordered one from the same seller on Amazon, fitted it but the lights remained on, drove through town to fill up, then upon restarting the car the lights were off and the car was back to normal, happy days. However, next day after i went away to work my wife told they came back on again. Told her to take it to a mate in Kwik Fit, he swapped the sensor again, no change, suggested it was the Wheel Bearing, swapped it, no change, he thinks it may be a wiring fault? Anyone had anything like this before?

[KevTrem]

A couple of years ago my 2012 C7 went in to Audi for rear pads, they stripped the front down too as they where low. They told me my wiring loom in each front corner had water ingress and needed replacement. I was told it was a common problem and there was a repair loom available. I declined and didn't have any issues. So it may be that your having that issue, could also be plausible that the sensor on your passenger side was fine and just had a bad connection.

[bluezie]

last year I got this fault code on my 2014 C7-

0352 - Front Left Wheel Speed Sensor
C101A 07 [137] - Mechanical Failure

I cleared the code, and it went away until last winter when the car was driven in snow when it came back several times in 2 days, then went away and has been fine for months. I was assuming it to be a faulty sensor or wheel bearing encoder ring. Does anyone know exactly where the wiring loom gets the water in?

[Crasher]

Normally it is the magnetic ring.