Bmw e46 m54 m52tu DISA valve check. Easy DIY

How to check if disa valve is working. I obly show how to activate the disa valve to see if it is opening en closing. Please also check of the valve itself is in good shape and if the pin (of the flap) is still in place. Only need a connector fro. Scrapyard a 9 volt battery and a push button. And a running engine. Otherwise it will nog operate due to lack of vacuum