common rail pump

[onlydiesels]

iv`e got a 1.9 dci (2003) which sounds like it`s got a noisy fuel pump,and i`ve got a brand new one which apparently is to fit a 2004/5 1.9 dci,but which has a slightly different part no. 0445 010 087 (mine is 0445 010 075).what i want to know is,is anybody on here able to tell me if this is interchangable with mine,or can anybody confirm the application for the 087 pump (could it be that mine is superseded by this?) or could anybody direct me to any thing on the net where i can check??
the part no.s are bosch no.s
i`ve tried renault,they were as helpful as a castor on a crutch,also checked bosch website but you can`t check/compare part no.s.