How do i fit new fuel pump

The first thing is to figure out which pump... there is a transfer pump (in the fuel tank) and a high pressure pump (under the right rear of the car) get under the car and have someone turn the key to "run"... if you HEAR a humming sound coming from the pump that you can SEE, then it is most likely the transfer pump... if you hear NOTHING then remove the boot on the pump and check for voltage on the positive terminal using a light or a meter. If no voltage then check fuse or the fuel pump relay. (hint: you should hear a "clicking" sound with your ear close to the fuse panel when you turn the key...) VW fuel pumps are really reliable as long as you don't have too much dirt or water in the tank. Eliminate the electrical circuit and high pressure pump as suspects before looking at the transfer pump. Hope this helps.. (oh, and have a clamp handy when changing the high pressure pump to avoid a huge fuel spill!)