I'd say the URO valve is junk. Googled the issue and there are a bunch of results pointing to the vent valve...
https://www.bimmerfest.com/forums/sh.../topics/170883
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02 Imola on Black Dinan S2 4.6iS
00 RoyalRot on Sand/Black 740i Short Sport
Last edited by Purplecty; 06-18-2020 at 08:52 AM.
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