Four Seasons 66754 A/C Refrigerant Discharge / Suction Hose Assembly

OE A/C Hose Assembly for Buick Regal and LaCrosse

Four Seasons 66754 is an OE replacement A/C refrigerant discharge and suction hose assembly built for R134a systems. It combines aluminum and rubber construction with the correct P-nut fittings, manifold connection, muffler, and included seals for service on select Buick applications.

Compatible with 2012-2017 Buick Regal without eAssist and 2011 Buick LaCrosse, this hose assembly is built for high-pressure and low-pressure HVAC routing in the air conditioning system. Four Seasons 66754 is a direct-fit service part for restoring refrigerant flow where the original hose has leaked, cracked, or lost sealing integrity.

Key Features

• Part number 66754 from Four Seasons Hose Assembly line
• Discharge and suction line assembly for HVAC refrigerant routing
• Aluminum / rubber construction for OE-style fit and flexibility
• Designed for R134a refrigerant systems
• Includes gasket or seal and fittings
• Manifold style suction end with muffler
• OE replacement design for select Buick Regal and Buick LaCrosse applications

Detailed Description

Four Seasons 66754 is engineered as an OE replacement A/C refrigerant discharge / suction hose assembly for vehicles using R134a. The assembly uses aluminum and rubber sections to match factory routing requirements while supporting both high-pressure and low-pressure sections of the HVAC system. It includes the necessary manifold connection, P-nut discharge and suction ends, and integrated muffler details for the specified application.

This part cross-references UAC HA111967C for the same application. It is a direct match for 2012-2017 Buick Regal without eAssist and 2011 Buick LaCrosse, making it a practical choice when replacing a leaking or damaged A/C hose assembly on these models. Four Seasons 66754 is also referenced by part number 66754 in aftermarket catalogs.

What This Part Helps Fix

• Refrigerant leaks at the hose assembly or sealing surfaces
• Cracked, hardened, or damaged A/C hose sections
• Poor refrigerant transfer between compressor and HVAC components
• Loss of system pressure caused by worn hose connections
• Noise or vibration concerns related to a deteriorated hose assembly

Installation Notes and Tips

Verify the vehicle uses R134a refrigerant and confirm the hose routing, end styles, and manifold configuration before installation. This assembly is supplied without a switch port and without a service port, so reuse or verify related system components as needed. Replace the sealing surfaces carefully and evacuate and recharge the system according to factory service procedures after installation.

Fitment language: Fits 2012-2017 Buick Regal, N/A, w/o eAssist; Hose Assembly. Fits 2011 Buick LaCrosse, N/A, Hose Assembly.

Quality Assurance

Four Seasons 66754 is built as an OE replacement HVAC hose assembly for the listed Buick applications, with included seals and fittings to support proper system service. The part is cataloged for direct replacement use in the specified fitment range.