[vinhvle]

I ordered a set of spark plugs from BMP Design this past January because I've reached the 40000 spark plug maintenance interval as specified in the owner's manual. As I was installing them this morning, I noticed the part numbers on the spark plugs read: ZR5TPP33. After researching the part number, I found it fits the N55 engine and according to the Bridgewater BMW and ECS Tuning websites, the correct number is: ZMR5TPP33 What am I missing here? Most signs point to a shipping failure on BMP Design's part, but I'd like to give them the benefit of the doubt because the invoice from them had the product name as: Bosch High Power Spark Plug (ZMR5TPP33) and I saved "2010 BMW X6M" in the stored cars section of my user profile.