Thanks everyone for your input and help.
I'm looking at fcp euro site for the disa valves and I found some made by rein (see below link)
Are these any good? They're half the price of bmw oe ones but if they're not worth it or will give me problems I'll go with bmw. Does anyone have any experience with them?
https://www.fcpeuro.com/products/bmw...in-11617544805
Pleased to hear and thanks for your help
Makis