Four Seasons 65978 A/C Refrigerant Suction Hose

Four Seasons A/C Suction Hose Assembly

Four Seasons 65978 is an A/C refrigerant suction hose assembly built with aluminum and rubber construction for the HVAC system. It is made for R134A and R1234YF refrigerant applications and includes the gasket or seal needed for the connection point.

Compatible with Lexus RX450h and Lexus RX450hL applications, this suction line hose assembly is a direct-fit service part for the air conditioning system. Four Seasons 65978 is engineered and tested for dependable operation, drawing on more than 50 years of mobile A/C experience.

Key Features

• Aluminum / rubber hose assembly for HVAC refrigerant routing
• Designed for A/C suction line service
• Works with R134A and R1234YF refrigerant systems
• Gasket or seal included
• No service port included
• No switch service port, bracket, or muffler
• Four Seasons 65978 replacement part number

Detailed Description

This Four Seasons hose assembly is built for the suction side of the vehicle air conditioning system, where refrigerant returns to the compressor. The aluminum and rubber design supports proper routing and connection in the HVAC system while the included seal helps complete the installation at the mating joint. Four Seasons 65978 is a practical replacement for worn, leaking, or damaged suction lines on Lexus RX450h and Lexus RX450hL models.

This part cross-references OE-style applications such as 212385 and A66288 for the same application. For shoppers searching Lexus RX450h A/C suction hose replacement or Lexus RX450hL refrigerant suction line hose assembly, Four Seasons 65978 is the matching service part to verify against the vehicle’s original configuration.

What It Helps Fix

• Refrigerant loss from a cracked or leaking suction hose
• Damaged A/C line connections at the suction side of the system
• Reduced cooling performance caused by hose deterioration
• Noise or vibration related to a worn HVAC hose assembly
• Service issues when replacing the original suction line on Lexus RX450h or RX450hL

Installation Notes

Verify refrigerant type, line routing, and connection style before installation. This hose assembly does not include a service port, switch service port, bracket, or muffler. Replace the seal at the connection point as part of standard A/C service practices, and evacuate and recharge the system according to the vehicle service procedure after installation.

Quality Assurance

Four Seasons backs this hose assembly with product engineering and testing focused on long-term, trouble-free operation. The brand’s mobile A/C experience is reflected in the design and application coverage of part number 65978.