Don't test then pump outside the tank, can be dangerous! The pump will run with the filter completely plugged so that's not a problem. The Bosch pump is the one to get if you want to replace just the pump. If you want the whole unit it might be best to pay the price for the OE. Looks like no difference for facelift or not with the fuel pump??

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)