Someone here mentioned that you should not use the paltinum +4 spark plugs. Well, they were absolutely correct. My 5th cylinder was misfiring due to a bad spark plug. BMW told me that I should not use those plugs because this happens all the time. I had those plugs for a week before I lost cylinder 5. Beware DO NOT USE THOSE PLUGS! NOT WORTH IT!
I had a ball joint to replace, needed an alignment, inspection, and 2 thruster arms.. Total bill - $941 + tax after my BMWCCA discount of $110.
I have saved over $300 thanks to BMWCCA. I think I am going to become a lifetime member.