Thread: DIY: 2006 BMW E53 X5 3.0i Brake Line Replacement
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Old 02-23-2022, 04:20 PM
oldskewel oldskewel is offline
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The fuel filter has an integrated fuel pressure regulator. That regulator vents a very small amount of gas vapors. Those vapors are routed all the way up to the intake.

I will guess that this hard plastic line is one of the lines in that path.
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2001 X5 3.0i, 203k miles, AT, owned since 2014
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