Approximately 28–30 ounces of R-134a refrigerant, with about 4 ounces of PAG oil typically used during servicing; exact amounts can vary based on the vehicle’s condition and service history.
Refrigerant type and capacity
The 2004 Honda Pilot uses R-134a refrigerant. The nominal factory charge for a typical, undisturbed system is around 28–30 ounces (0.83–0.89 kilograms). If you are servicing the system, you’ll also add a small amount of PAG oil, commonly about 4 ounces (roughly 120 milliliters), though the precise oil quantity can vary by compressor type and how much oil remains in the system.
Quick reference figures
Before relying on a list, note that these figures come from common service data and shop practice for this model year. They are intended as a baseline and can vary with vehicle history and specific options.
- R-134a refrigerant capacity: 28–30 ounces (0.83–0.89 kg) for a typical, factory-equipped 2004 Pilot.
- PAG oil capacity: about 4 ounces (120 mL) during servicing; some procedures cite 3–6 ounces depending on the exact compressor and system condition.
In practice, the exact charge should be verified by weighing the refrigerant or by following Honda’s service data for the VIN and configuration. Evacuation of the system and leak checks are essential steps before adding refrigerant.
Practical considerations for a recharge
Handling refrigerants requires proper equipment and compliance with environmental regulations. Use a recovery/recycling machine, evacuate the system thoroughly, and avoid venting refrigerant to the atmosphere. If you’re not trained or equipped to perform an A/C recharge, it’s prudent to have a certified automotive HVAC technician handle the service to ensure the correct charge and system health.
Summary
For a 2004 Honda Pilot, plan on about 28–30 ounces of R-134a refrigerant and roughly 4 ounces of PAG oil during servicing. Actual amounts can vary, so always verify with the service data for your specific vehicle and use proper recovery and charging procedures. When in doubt, consult a professional to protect the system and the environment.