Spraying potential locations for a vacuum leak is always worth a try but it doesn't always work. In my experience, it is at best a 50-50 chance. A smoke test is a much better way to locate vacuum leaks. There are some Youtube vides detailing how to make your own.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas