Vvt servo motor replacement

Japie E9X

New member
Hallo Guys a quick question please ;
I have a 2008 e90 320i manual and had 2 scans done first guy said battery is the most likely cause as voltage was low so got it replaced and my problem was still present so i took it for a second scan at another place and they reckoned my VVT Motor is shot so i bought a new one and a new tappet cover gasket , so my question is can i change the motor myself and is it realy necasarry to calibrate it afterwards or is there a prcedure with the key i can do myself?
This question probably gets asked a lot on here but i couldnt find anything regarding it, any advise would be appreciated
 
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