I notice that the last digit of the part number is different in the one I got from the scrappy and the one on the car. The one on the car is:
Nissan 42537M
22100-99B04
The one from the scrappy is:
Nissan 42537N
22100-99B04
So I am guessing that the last letter is a check digit for the year of manufacture? Would that be right?