Originally Posted by E90TT721
Question for you did you at any point in time mention that you found information for this issue from a BMW forum site or searching the web? I am getting a rattle when on start up only and thinking of going in to have them look at it, but not exactly sure what to say to them.
Thanks for your informative write up on your issue.
That rattling on start up MAY actually be the valve opening of the exhaust. Search and perform "golf-tee mod" if you have not already, and see if that is your solution.