- You posted a message to get help but did not state mileage.

- If you have > 150K, I'd replace the fuel pump.

Search for Pierburg brand.

PS: Also search forum for the siphon O-ring issue, may be you have no fuel in the fuel pump side.

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT