I've google all kinds of combinations and come up with nothing. When I look for "sending unit" it shows a different gasket than what came off. Idk if the last person accidently switched gaskets but the one that came off does NOT fit. I filled up the tank and found it was leaking when I went out the next day so I had to let gas leak into cake pans under the car to get the fuel level down far enough to do anything, then once I got it down I siphoned two more gallons out... 4 gallons total. I still can't tell what the hell that odd looking thing ia. I cant get it up high enough to look at it because I'm afraid I'll break it. Till I find out what this is and get this gasket, I'm parked and stuck. 2004 B5.5 Passat 4 motion 1.8t 5 speed.