Four Seasons 66746 A/C Refrigerant Discharge Hose

Four Seasons A/C Discharge Hose for Mazda MX-5

The Four Seasons 66746 is an OE replacement A/C refrigerant discharge hose assembly for select Mazda MX-5 and Mazda MX-5 Miata applications. Built with aluminum and rubber construction, it is specified for R134-A systems and includes the required gasket/seal, fittings, and green O-rings for the discharge line connection.

Key Features

• Brand: Four Seasons Hose Assembly
• Part number: 66746
• Type: A/C refrigerant discharge hose / discharge line
• Material: aluminum / rubber
• Refrigerant type: R134-A
• OE replacement design for factory-style fitment
• Gasket or seal included
• Fittings included
• Green O-rings included: [24661] style
• Configured without switch port, service port, bracket, or muffler
• Suction end type: P-nut fitting

Product Details

Four Seasons Hose Assembly 66746 is built as a discharge line for the air conditioning system, carrying refrigerant from the compressor toward the condenser in compatible Mazda MX-5 and Mazda MX-5 Miata vehicles. The aluminum and rubber construction supports the routing and connection requirements of the factory-style HVAC layout, while the included seals and fittings help match the original service configuration. This part cross-references UAC HA112102C for the same application.

Fits 2006-2015 Mazda MX-5, N/A. Fits 2006-2015 Mazda MX-5 Miata, N/A. This part number, 66746, is also referenced in interchange listings for related aftermarket and OE-style applications.

Common Replacement Reasons

• Leaking or cracked A/C discharge hose
• Loss of refrigerant pressure in the discharge line
• Damaged hose fittings or seal surfaces
• Corrosion or wear at the hose assembly connection points
• Restoring proper refrigerant flow in the Mazda MX-5 A/C system

Installation Notes

Verify refrigerant system compatibility with R134-A before installation. Inspect mating surfaces, replace damaged seals as needed, and confirm the hose routing matches the original discharge line layout. Because this assembly is supplied without a switch port, service port, bracket, or muffler, compare the original part configuration before ordering. Proper evacuation, recharge, and leak testing should be performed after installation.

Quality Assurance

Four Seasons supplies OE replacement HVAC components, and this hose assembly is built to match the factory-style discharge line application for select Mazda MX-5 and Mazda MX-5 Miata models. Part number 66746 is specified for direct replacement use in the listed vehicles.