Any part number with X at the end is exchange part from Audi meaning that you need to return old part to them. The correct part number for 32V S8 automatic is 4D0907557N. This should help you with the search or alternatively I do have spare unit if you are unable to find one elsewhere. The replacement unit will need to be paired to immobiliser unit in the car using VAS5054, VCDS or similar tool. It does need to be N at the end but physically all the letters should be the same, just different software for A8/S8 3.7/4.2 and manual/auto boxes.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
Last edited by ainarssems; 25th February 2018 at 03:58 PM.
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