What year did auto makers have to switch from R-12 to R-134 AC systems?

Question

I'm looking to buy the most reliable late model used vehicle with factory R-134 AC system installed.

Answer 1

Dichlorodifluoromethane (R-12), usually sold under the brand name Freon-12, is a chlorofluorocarbon halomethane used as a refrigerant and aerosol spray propellant until its manufacture was discontinued in 1995, due to concerns about damage to the ozone layer. The ozone depletion potential of R-12 is 0.82, which is relatively high.

I know Chevy/GM switched in 1994.

MikeC

Answer 2

It depends on the automaker, and sometimes where they are made. But it was around 1993 and 1994 for most of the automakers.