Four Seasons 55691 A/C Refrigerant Suction Hose

Four Seasons 55691 A/C Suction Hose

Four Seasons 55691 is an OE replacement A/C refrigerant suction hose assembly for low-pressure HVAC service. It is built for R134-A systems and is listed for 1990-1992 Lexus LS400 suction line applications at the evaporator end.

The Four Seasons Hose Assembly line focuses on direct-fit HVAC hose and pipe replacements for serviceable air conditioning repairs. This part number, 55691, follows that OE-style approach with the correct end connections, integrated seals, and a switch port provision for the listed application.

Key Features

• OE replacement A/C refrigerant suction hose assembly
• Designed for low-pressure suction line service
• R134-A refrigerant type
• P-nut fitting on one end and captive O-ring connection on the other
• Includes gasket or seal and fittings
• Includes two green O-rings, [24610] / Green O-Ring
• Includes one 1/4 service port provision with switch port
• Bracket not included; muffler not included

Detailed Description

Four Seasons 55691 is an A/C refrigerant suction hose assembly engineered for the low-pressure side of the HVAC system. It is specified as a suction line with a P-nut fitting end and a captive O-ring end, making it a direct OE-style replacement for the listed Lexus LS400 applications. This part number, 55691, is intended for R134-A refrigerant systems and includes the sealing components needed for the connection points.

Compatible With 1990-1992 Lexus LS400, suction line at the evaporator end. This application-specific fitment makes Four Seasons 55691 a practical choice when replacing a worn, leaking, or damaged A/C suction hose on the Lexus LS400. This part cross-references A70431 for the same application.

Common Repair Uses

• Replacing a leaking low-pressure A/C suction hose
• Restoring refrigerant flow in the evaporator-to-compressor circuit
• Repairing damaged hose ends or worn sealing surfaces
• Addressing A/C performance loss caused by suction-side refrigerant leakage
• Servicing an OE-style HVAC hose assembly on a Lexus LS400

Installation Notes

Verify the vehicle’s refrigerant system uses R134-A before installation. Match the end styles, service port provision, and suction-line routing to the original part on the vehicle. Inspect mating surfaces, replace worn seals as needed, and confirm the hose is routed without kinks or contact points after installation. For the listed application, use the fitment details for 1990-1992 Lexus LS400, suction line, evaporator end.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with OE replacement coverage across air conditioning hose and pipe applications. Part number 55691 is built to match the listed vehicle application and connection style for service-ready replacement use.