R134a vs R1234yf: Which Refrigerant Does My Car Use?

If you’ve booked a car air conditioning re-gas recently, you may have heard the terms R134a and R1234yf. They’re the two refrigerants used in most cars on Australian roads — and using the right one matters.

R134a — the older standard

R134a has been the standard automotive refrigerant for decades and is still found in the majority of cars built before around 2017. It’s well understood, widely available and cost-effective to service.

R1234yf — the modern replacement

R1234yf was introduced to meet stricter environmental regulations — it has a dramatically lower global-warming potential than R134a. Most new vehicles built from roughly 2017 onwards use it. It requires different equipment and handling, and it costs more per kilogram.

Why you can’t mix them

The two refrigerants are not interchangeable. They operate at different pressures, use different oils and require different service fittings (the connectors are deliberately a different size to prevent cross-contamination). Putting the wrong gas in a system can damage it and void warranties.

How to tell which your car uses

• Check the under-bonnet label — most cars have a sticker stating the refrigerant type and charge weight.
• Use the build year as a guide — pre-2017 is usually R134a; later models are increasingly R1234yf.
• Ask a specialist — we identify the correct refrigerant for your exact make, model and build date before any work.

We service both

Our workshop is equipped for both R134a and R1234yf, so whatever you drive, we can re-gas and repair it correctly with the right gas and oil.

Not sure what your car needs? Send us your make and model or call 02 9398 7888.