josephanthony

Can someone please post a picture of the location of the front O2 sensors?

silverd2

Tough thing to photograph, but driver's side is easy to spot (flashlight), directly down under the heater hose bleeder valves on top of the downpipe, right after exhaust manifold connection...and the easiest one to change. At the correct angle you can just get a hand on it from above, unless you've got thick arms.

The passengers side is the same location on that side's downpipe, but a bit tougher to get to...gotta move a few things, but doable. There's a few different methods...Bentley says remove the entire down pipe (NOT necessary), but here's the way I did it >>>

http://forums.quattroworld.com/a8/msgs/49929.phtml

#6 >>>

josephanthony

Thanks so much for both the drawing and step by step install! Very helpful.

Cheers!