Yes, all vehicles made after 1994 are R134a freon
A 1999 Jeep uses R134a.
You don't add Freon as it has R134a not Freon. You add it to the low pressure side which is the larger hose.
Your 1999 Nissan Ultima air conditioning system needs to be charged with Freon, from time to time. A Freon recharge kit can be purchased at most auto-parts stores.
jack altimas
1lb 3/4 of r134a
Nissan Altimas have a port on top the engine that allows a driver to pour oil into the engine. The port will have an oil cap on it that will have either "oil" labeled on it or show the picture have an oil pitcher.
My guess is the system is low on freon being 11 years old.
How do you add freon to a 1999 Honda Passport
The first thing that you will need to do is have the a/c freon pressures check and if they are okay then check the pressure switches..............
freon for 1999 ford explorer =========================== r134a ( Helpfull )
R134A
have system evacuated prior to charging - may have air causing excessive pressure