Before you buy an AC recharge kit, you need to know which refrigerant your car uses. Using the wrong type can damage your compressor and void your warranty. Here's how to tell them apart.
The Short Answer
- 1994-2021 vehicles: Almost certainly R-134a
- 2022+ vehicles: Likely R-1234yf (required by EPA regulations)
- Pre-1994 vehicles: R-12 (requires professional service)
How to Know for Sure
The easiest way: look under your hood for a sticker near the AC compressor or on the hood latch area. It will say either "R-134a" or "HFO-1234yf". You can also check your owner's manual under "Air Conditioning Specifications."
What's the Difference?
R-134a (HFC-134a)
- Used in most vehicles from 1994-2021
- Available in DIY recharge kits (-)
- Can be purchased and used without certification
- Being phased out due to high global warming potential (GWP: 1,430)
R-1234yf (HFO-1234yf)
- Required in all new US vehicles since 2021
- Much lower environmental impact (GWP: 4)
- Significantly more expensive (-+ per can)
- Requires EPA Section 609 certification to purchase in bulk
- Some DIY kits available but less common
Can You Mix Them?
Never. Mixing R-134a and R-1234yf will contaminate your system and can cause compressor failure. The ports are actually different sizes to prevent accidental mixing - R-1234yf uses a larger port fitting.
What If I Have a 2019-2021 Vehicle?
The transition happened gradually. Some 2019-2021 vehicles still use R-134a while others use R-1234yf. Always check the under-hood sticker - don't assume based on year alone.
Shop R-134a Recharge Kits
If your vehicle uses R-134a, we carry a full selection of recharge kits from top brands including EZChill, A/C PRO, Arctic Freeze, Chemours Freon, and Johnsen's. Fast shipping and competitive prices.
