Quote Originally Posted by Dave
Have you identified the oem manufacturer. Surely there's a cheaper Bosch equivalent.

I had exactly the same issue with the M5 and picked the Bosch part up on Amazon for a fraction of the cost here, even relative to micks garage
Micksgarage was of no help (only post cat sensors and they wouldn't confirm if they are interchangeable [doubt it] without a part number) don't know who the oem is, is there a Realoem equivalent for VW to find the part no. on?