Supposedly OEM? Pictures of cranksensor
 

I'm leaning towards OEM but, i've never seen a decorated "Nissan Group" box, usually they are bags or plan brown cardboard with the plain dark grey/gray "Nissan". It does look like some kind of fiber reinforced plastic and it does have a witness mark. It also has an injection molding burr(s) and tinge of glue "slop". the metal looks to have some sort of plating, simple. If it is OEM this should serve as helpful information with all the counterfeit and aftermarket sensors.

https://imgur.com/TebqVnX

https://imgur.com/6oXPhT3

https://imgur.com/Ra6XxU0

https://imgur.com/6oXPhT3

https://imgur.com/ypb7qeK

https://imgur.com/yQ0uU3P

https://imgur.com/MbFFV6Q

https://imgur.com/QeiaU6b