2004 Audi A4 Avant 6 cyl. Quatro L.H. drive

Started leaking fluid last week (spot on garage floor). My guess is valve cover gasket at the rear of the driver's side bank or maybe rear cam seal. V.C. gaskets have been replaced twice so far in 115k miles. The amount of fluid is about a cap full per day. It looks like someone took a cap full of new oil and dumped it on the floor. The only thing that makes me think it's not a valve cover gasket is the oil has 6k miles on it and this fluid looks brand new - slight honey color - feels like oil.



Picture is of the driver's side front corner of the transmission (auto). Arrow points to oil dripping off of cable. Hub is to the left. Further to the left (out of picture) is the inner C.V. joint/boot. Above this is a semi circular splash guard(?) There is oil dripping from one edge of the guard, indicating it is coming from above that but I can't really see anything up in there. The C.V. boot feels like it's in good shape, dry and the inside of the guard is dry. The Plastic undertray for the engine is also dry.

Whaddya think?

Also where the heck are the rear O2 sensors? I couldn't find them.

Thanks.