Does anyone knows what is the Thermostat temperature for the OEM Tacoma 3.4 v6?

I'm trying to adopt an electric fan and need to know what sensor should I get based on thermostat temperature.

 

Edit: It opens between 176º and 183º F and is fully open at 203ºF.

 

^^^^ that's correct for the 180°F thermostat and it's fully open at 203°F.

 

Just make sure your jiggle valve is at the 6 o'clock position when you install it.

 

What temperature is actually written on the thermostat? Is it opening or fully opened temperature?
I found one on the web, but it has 90C stamped on it.

 

82°C is stamped on the stock 180°F Kuzeh brand t-stat that came in the engine originally which is part number 90916-03075. 90°C is a 195°F stat and is a non-stock part for this engine.

Per FSM (Factory Service Manual):
"Valve opening temperature: 80-84°C (176-183°F)
Valve lift: At 95°C (203°F): 8 mm (0.31 in) or more

If the valve opening temperature and valve lift are not within specification, replace the thermostat."