I have had my 335 for less than a year and have had this noise the entire time (You can hear it: http://www.e90post.com/forums/showpo...36&postcount=1
). I didn't think much of it until I had the car checked by my mechanic yesterday and he said it is the actuator motor going bad. The light isn't on yet and the system works properly but it sounds like it will eventually fail and the mottor will have to be replaced. I am running almost stock, only DCI and Alpina B3 TCU flash.
I see there are few of you guys who had that problem and had to replace the motor. Is there an after market re-inforced version of it or I will have to just replace it with the stock unit when it goes bad?