Just a heads up, the one you found wont work. It is the right plug but the sensor end is to long to fit in the housing. At least from holding it on top. I'm gonna see if it threads in tomorrow.
I was wondering if anyone could tell me if the silicone hose kits you see online for a fjz80 4.5l will fit a fj80 4.0. Mostly the heater hoses more then the rad hoses. Thanks for the help.