The Freon type you need for a 1990 Toyota AC system is R-12. You can no longer purchase R-12 over the counter in the USA unless you have a license for it. The only place you can get it is by having your AC system repaired at a shop that is licensed to use it... unless you are fortunate enough to have a licensed buddy who sneaks it to you on the sly ;-)
Now.. that is the answer for the USA. A more complete answer would involve knowing what country you live in as you can still buy R-12 over the counter in some countries.. but not many.
R134a
r-134A
R134a freon............
Scions and Toyotas have converted to the new pink/red version of coolant, sold primarily at dealerships. You can find that specific coolant online as well but if you can't- you can always use the yellow colored coolant that is safe for all makes and models sold at auto parts stores (i.e. Auto Zone, Kragen/Checker) I prefer Prestone. Hope this helps!
Scions and Toyotas have converted to the new pink/red version of coolant, sold primarily at dealerships. You can find that specific coolant online as well but if you can't- you can always use the yellow colored coolant that is safe for all makes and models sold at auto parts stores (i.e. Auto Zone, Kragen/Checker) I prefer Prestone. Hope this helps!
The factory coolant is a red, five year, HOAT type coolant.
Just had to fix mine so I know. It uses R12. I had to replace my compressor so I had it modified to134a.
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