I'm stranded at AutoZone
 

Bottom bolt of thermostat housing broke off!
https://cimg6.ibsrv.net/gimg/g35driv...a6e60e1e8f.jpg

Hopefully they helped your extract that bolt 😱

Just grab it with a pair of channel locks and unscrew it. Then use a new bolt, Nissan part number 11916-31U0B.

This is also why you never perform repairs at the parts house unless it's something like changing out the battery. There's usually some other issue that pops up and now you're stuck.