Changed the spark plugs on my 750i, did both the PCV valves too.
Wow, the back two plugs are a real pain, and took some figuring out to get right and make sure I had the correct access. Ended up changing extentions, universal joints and adaptors all the way through to get them done. Thankfully the other 6 were all very simple. Still, what I thought would be a 1 hour job became 3 hours. With 2 of those on the back plugs alone!
Just to reset the message on the computer and it's done
Going back out later after the kids are in bed to do a weeping o-ring on the lower coolant temp sensor. (2 min job) then change the angel eye bulb's, which apparently means taking off the bumper cover