What kind of refrigerant does the Acura MDX use?
The Acura MDX uses R-1234yf refrigerant in most modern models, while older MDX generations relied on R-134a.
As the MDX lineup evolved, Honda/Acura shifted refrigerants in line with environmental regulations. This article explains which refrigerants have been used, how to verify the correct type for your vehicle, and what it means for service and safety.
Refrigerant types by MDX generation
The switch to R-1234yf came as part of broader rules to reduce greenhouse gas emissions. For the MDX, that change occurred in the mid-2010s for most models, meaning current and recent MDXs generally use R-1234yf, while older generations used R-134a.
- Current and recent MDX models (roughly mid-2010s onward) use R-1234yf.
- Older MDX generations built before the switch used R-134a.
Market and model variations can occur. Always verify the refrigerant type for your exact vehicle with its service label or owner’s manual.
How to confirm the refrigerant on your MDX
To confirm the refrigerant type for your vehicle, use these checks:
- Check the under-hood service label near the AC ports for the exact refrigerant specification (R-1234yf or R-134a).
- Consult the owner’s manual or service documentation for your vehicle’s refrigerant requirement.
- Ask a certified Acura/Honda technician or your local dealer, providing the VIN for precise confirmation.
Knowing the correct refrigerant helps ensure proper charging, oil compatibility, and compliance with environmental regulations.
Why the refrigerant choice matters
R-1234yf has a much lower global warming potential than R-134a (GWP around 4 vs 1430). The transition reduces environmental impact when leaks occur or during servicing. However, 1234yf is mildly flammable (A2L), so service must follow appropriate safety guidelines and use equipment designed for that refrigerant.
Maintenance and servicing tips
Key reminders for MDX HVAC maintenance, regardless of the refrigerant:
- Always use the refrigerant specified for your vehicle and have system charging performed with proper recovery and reclamation equipment.
- Do not mix refrigerants; wrong refrigerant can damage components and void warranties.
- Use the correct lubricant oil type if servicing (PAG or POE as specified for the refrigerant).
Following these practices helps maintain cooling performance and minimizes environmental impact.
Summary
The Acura MDX generally uses R-1234yf refrigerant in its modern HVAC systems, while older models used R-134a. Verify the exact type on the vehicle label or in the owner’s manual, especially if you’re dealing with an older MDX or a vehicle from a specific market. Properly servicing with the correct refrigerant supports reliability, safety, and environmental compliance.
