You should be able to hear the pump ticking when you run the test in VCDS. One of mine broke and it is replaceable with a cheap Chinese pump off ebay, but it is a real pain to get to as the supply fuel pipe to it is really short; I extended my pipe on replacement to make it easier to change in the future. It is hidden above the rear left level sensor area.
Pros: replaceable with cheap pump
Cons: difficult to access, short fuel pipe
