Ok, so I got some new plastic trim attachments and I was doing a lot of detailing and taking pieces off. After I was done I had this extra part. Obviously this means I improved upon nissans design, I would still like to know what it is.

15 Q40.

 

Under the dash or seats

 

Check the back for a part number, if it does have one just a quick google search will have your answer.

 

My guess would be steering column

 

I was gonna say flux capacitor but NealP is probably right

 

Bottom housing of the steering column,

 

Instrument Panel - Page 12