Chasing a long crank before start issue that was getting worse and now happening all the time.

Had a check valve installed at the fuel pump outlet. Still starting hard.

Just put in a new fuel filter. Rubber vacuum hose to fuel pressure regulator on filter was disintegrated and put in a new rubber hose along with the new fuel filter.

Looks to have fixed it! Just not sure if it was just the hose, the filter/regulator, or both, that did the trick

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04 X5 3.0i auto
03 X5 4.6is