I have 2012 X5 5.0, upon acceleration I am experiencing “hesitation or miss” from engine, and a “Engine Malfunction”. I believe it’s a coil, had same issue on a Jaguar and Aviator (bought pack of 8 for $250 and paid $100 labor - probably not that lucky on X5). What will I pay to replace coils? What is cost to do spark plugs at the same time?