Oh, I forgot to add - if your engine IS the earlier model (still not sure but I think it is...) then the fuel rail pressure sensor will be at the BACK of the rail, where the pressure regulator is on my M57TUD30 (yellow arrow location in photo above). Acessing this WILL require the removal of the intake manifold.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)