DIY: Spark Plug Change N55 (2011 335i Sedan) Video
Feedback appreciated. Some advice before you start:
1.) PLEASE USE METRIC TOOLS! This is a European car and guess what measuring system their engineers use? I see other DIY's saying to use SAE or English size sockets and such... It MIGHT work, but you run a big risk of rounding off the nuts/bolts! If you do that, you will need special tools to extract.
2.) Be patient and take your time (2-3 hours). Its tempting to do things right before a run or such, but trying to do a repair under time pressure is not ideal. You run a big risk of doing something wrong and then having to redo it.
3.) Try to do this on a level surface as you are removing a strut brace. And for your own safety should parking brake fail, etc...
Here's Part 1 of the video. Takes you all the way through removing the first spark plug.
And here is Part 2. Takes you all the way through starting the engine back up!
I want to add that I always cover the pipe going down to the turbo after you removed the air intake at 3:10. If anything falls down there you are screwed. I use a plastic bag and a tie wrap.