Newreplacement PCV crank ventilation breather valve for A3 A4 A6 TT 2.0 TFSI with OEM part number 06F129101R printed on your original unit.
Please use the Ebay compatibility as a guide. and confirm your part number matches the number in this listing.
Whilst not an exhaustive list the most common engine codes this will fit are :
AXX. BWA. BHZ. BZC
BWE. BUL. BPJ. BGB
*International shipping quoted for EU zone. please ask if outside