Hey guys i'm new to the whole v/w audi scene so hello! I have just recently acquired a 2006 audi A3 TDI Quattro and the ESP light was coverd on the dash, once removed and diagnosed I got a code reading of 01324 (no communication to control module) instead of messing around i checked the ovbious (wires/condition) and all seemed ok so I took it to a specialist who diagnosed it and advised me to buy a second hand unit. I then purchased one on ebay complete with diff and pump and had the whole lot fitted, I had the phone call today to tell me that its bad news and this unit is bad also. I really don't know where to go next I have two complete rear diffs and both dont work. the error code is the same however now with the second unit when I clear the codes it stay off for maybe a minute max. any help really really would be appreciated!