a4avant99

Bought an 1999 A4 Avant 1.8T Quattro in August with ABS light on. The error code was

00290 - ABS Wheel Speed Sensor: Rear Left (G46)
35-00 - -

A quite reputed VW/AUDI shop in the city told me I need to replace the ABS sensor (Part #: 8d0 927 807 f) for the rear left wheel. I ordered a sensor, put it on the car, and reset the light. The light came one again in two minutes of driving. This sensor has a bolt on it, and I cannot adjust the gap between it and the ABS ring.

I then think it might be a problem of the ABS ring. For having a look at the ring at the rear right wheel, I have damaged the ABS sensor by twisting it too stong. I had to buy an ABS sensor for the rear right wheel that is different from the left one (Part #: 8d0 927 807 c). I learnt two things: (1) the gap between the sensor and the ring is only about 2 mm; (2) my rear left ABS ring was heavily rusted.

I have then bought a new CV-joint with the ABS ring. But this did not fix the problem. I then begin to doubt if it is the gap between the sensor and the ring. I did not think of this because the gap is not adjustable if I use the standard sensor for this wheel that has a bolt for to be fixed. I measured the depth of the sensor hole and compared with the sensor. I found the gap should be over 5 mm.

I then tried to adapt the old sensor by filing away the metal part for fixing the bolt. I arrived to adjust the gap to about 2 mm, and the light is fixed.

Now I realized that the ABS ring was not so rusted as unusable. I could have fix it by cleaning it using BP Blaster with a tooth brush.

It was a problem I could fix without costing a single $. But I have bought two sensors and one CV-joint that costed about $450.00.

Hope to get $100.00 back by selling the new sensor I have bought (Part #: 8d0 927 807 f). I have put it on my car only for a week or two. I ordered it at >$160.00.

I have not yet checked if I can take the ABS ring off the CV-joint. I will check it later.

f3d

the cv boot was torn maybe the abs ring is rusted too badly. the lil metal mesh thing that goes around the abs sensor was rusted a lil maybe i just need to clean that sucker up.