Emission Control problems of the 2004 Volkswagen Touareg

I was driving on the highway @ 70mpr when all of a sudden without warning the car starts acting sluggish for a min then back to normal, and randomly for the next hour or so does(I had a ways to go) this a few more times. I got to my destination and let her rest for the night. The next morning it was doing fine except now the emission control light came on and stayed on. By this time it was time for the 100,000 mile maintenance to be done and it did great until about 6 months later I was driving @ 35mpr when it started loosing power, tho I only lost a little bit of power steering was forced to come to a stop, which just happen to be a one way bridge, baby in the car and had to push myself the rest of the way across it. Once off the bridge I turned the car off (it stayed on til I did this) let it rest a minute and it started up fine and let me go a few blocks still sluggish and then lost power again. I repeated this process for about 5 miles or so when I was forced to park it cuz I didn't want to risk crossing the highway again. Had it towed to dealership where they did the flange recall, that didnt' fix the problem so had to replace both fuel pumps and that was roughly @ 103,000. 8 months later it happens again this time around 107,000. Dealership took 4 hours to diagnose only to tell me I need the fuel tank replaced because somehow all the wires, connectors, and caps that have to do with the fuel lines/tank/pumps are either missing, cracked, or damaged so I need a wiring harness as well. They are quoting a me $5000 fix!!!.

The contact owns a 2004 Volkswagen Touareg. The contact stated that the oxygen sensor emmissions warning light remained illuminated. The contact stated that the vehicle would not accelerate fast enough due to an rpm malfunction. The vehicle was taken to be diagnosed, but was not repaired. The manufacturer was not made aware of the issue. The failure mileage was 134,447.