I get lots of inquiries from folks who don’t have the compass / ambient temp gauge in their Toyota Tacomas, and want to install one. Unfortunately, it generally isn’t as easy as buying an accessory meter (Toyota’s terminology for the display)…you must also ensure your truck has the wiring and temperature sending unit, plus the console must be fitted for the display itself.
See this post on Tacomaworld for more info.
If you don’t have the necessary wiring / harnesses installed, see here
In the future, I intend to discuss alternatives to the OEM version, and I may even develop a custom solution that offers more information and flexibility.