hey guys help please i have 2001 a4 1.8t quattro am having brake pulsation right before i come to a compleat stop. So i took it to the dealer they said my rear wheel speed sensors are slow to respond and rear sensor rings need to be replaced as weel. Parts are 980.00 and labor 535.00 i dont want to pay that kind of money. Does anyone know or have any information how to replace the rear sensor rings any help would be appriciated thnx guys....

 

I think the rings are built into the axles which is why the parts are so expensive, but that sounds likea load of horse ****! Just get the two rear abs sensors and install them yourself and see what happens.
I think there is a single allan bolt holding in the sensors, easy repair. If that doesn't fix it then worry about the rings.

 

I'm having the same problem. What makes them so sure that it's the rears? Have you got any CEL's or ABS lights?

 

You can monitor each wheel speed sensor using the VAG or VAS 5052 while drving or raised on a rack.
If the rears start going wacko the tech is gonna assume the problem is in the rear, and to save his own *** he's gonna say its both the sensors and the rings. Reality of the flat rate world they aren't trying to screw you in general they are just trying to get paid and get the next car in thier bay.

 

i dont get any lights or nothing just pulsation the dealer said they tested the sensors and rear ones are slow to respond and thats what is causing the pulsation. thats what they told me anyways...

 

Well that is a pretty awesome thing to know. I suppose I should learn how to use my vag-com enough to be able to do that... so at least I know which effing sensor I need to be playing with. I've already replaced one rear relucter ring (because I knew it was rusted/cracked) but it didn't fix the problem.
Disconnecting the ABS under the hood fixes it, though! haha ...

Seriously though... that vag thing is awesome. Do you know how to do it?