A3 Quattro problem

Deanis28

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hi can anyone help I have a A3 1.9tdi Quattro sport when am reversing or turning right the back drivers wheel shudders and it’s like it sticky but when I pull haldex fuse 31 car runs fine! The drivers back calliper is sticky pads and discs can do with a change. The haldex was serviced about 2 months ago can anyone help please???????
 
Sounds like the controller is faulty... they do it all the time... replacement (normally secondhand) will be needed

<tuffty/>
 
Sounds like the controller is faulty... they do it all the time... replacement (normally secondhand) will be needed

<tuffty/>
Thanks for the reply What is it called as not a clue about that stuff what is it I have to ask for if buying one ?