I just finished replacing the oil filter housing gasket. This DIY was right on. MY only real issue was the bolt behind the intake. I had to use a not ratcheting 8mm to break loose the bolt as the ratcheting version did not have enough room to grab. It was tricky because there is very little room and if the bolt is not positioned right to start off you can't get the wrench on it.
I did take out the air filter box so I had room to move the housing around to clean. I wasn't able to get the coolant hose off the housing or it would have been much easier to clean everything.
I'm surprised the Bentley manual did not have this as a DIY.
06 BMW 330i