Quote:
Originally Posted by matreyia
Yes, you are correct. They are different. If one looks at them without a sharp eye, one would miss the differences, such as the coating on the tip of the center electrode and the rounded edges. I don't know if this does anything, but these things are definitely different from the generic Bosch plugs.
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The inside of the insulator is also different OE Bosch/BMW plugs vs Bosch OEM plugs. IF you were to cut the spark plug vertically, you would see the difference inside the ceramic insulator.
Dackel