How to know what refrigerant uses my car?

All new cars coming off the assembly line today have R-1234yf refrigerant running through their air conditioning system. However, there are several models that still use R-134a.
How do you tell what’s in there?
 
There’s a sticker under the hood, somewhere right up front, that tells you which refrigerant was used in the factory fill, and it also tells you how much. That sticker is part of SAE Standard J639, which provides safety and design standards for automotive air conditioning refrigerant systems. 
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Starting in January 2011, all new vehicle types must have an air conditioning refrigerant with a global warming potential (GWP) below 150. From 2017 on, this will apply to all new vehicles. This is based on the MAC Directive (2006/40/EG), passed in July 2006. Solstice® yf (R-1234yf) refrigerant can be used in Europe, Japan, Korea, and the U.S. Under the ECE Agreement, Solstice® yf refrigerant is also approved in Germany.
APPROVALS: Solstice® yf refrigerant is registered under the EU chemical regulation REACH, and is included in the U.S. E.P.A.’s SNAP Program (Significant New Alternatives Policy). With this program, the EPA evaluates new and improved substances that replace ozone-depleting substances.
For more information about the refrigerant R-1234yf visit the page on the Honeywell website.

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