It's a fairly simple system, pump, pipes, rack.
How damaged was it? Was it fine before? Was it damaged from a crash? If so was the engine cut out from the crash or was it kept running? Is it possible that it stayed running but the pas fluid drained out and the pump ran dry? Or was the bottle cracked into small bits and possibly 1 piece is lodged somewhere causing a flow problem?
There's a story here and pictures may help
56 350 2.2 130ps mk7 with 2 side doors
65 290 2.2 125ps custom with 2 side doors
07 350 170ps
Ids v86 licence + v86.04 update + xprog
hereIds map
here