Where is the EGR valve located on a 2000 Volkswagen Passat?

There are two, one on the driver4s side and one on the passengers side. Both are hard to see as they are in the back of the engine compartment buried under a number of hoses and crap. Look behind the engine block, just to the left and right and you will be able to see shiny circular disk.....that is the top of the valves. If that does not help, follow your breather pipe which snakes from the left of the engine in an "L" shape to the back right of the engine....it leads pretty darn close to the driver-side egr valve...also known as the combi-valve.