Four Seasons 66939 A/C Refrigerant Suction Hose

Four Seasons 66939 A/C Suction Hose

Four Seasons 66939 is an A/C refrigerant suction hose assembly built for the 2019-2020 Acura MDX. It combines aluminum and rubber construction with male P-nut ends, a muffler, and included seals to support a direct replacement for the suction line on the vehicle’s HVAC system.

Four Seasons hose assemblies are part of the brand’s Hose Assembly line, focused on replacement A/C plumbing for mobile air conditioning systems. This 66939 hose assembly is engineered and tested for dependable operation in R134A systems, with OE-style fitment details that matter during service.

Key Features

• Part number 66939 A/C refrigerant suction hose assembly
• Fits 2019-2020 Acura MDX, suction line application
• Aluminum / rubber construction for HVAC routing and flexibility
• Male P-nut end connections on both ends
• Designed for R134A refrigerant systems
• Includes gasket or seal and O-ring A seals (24150 / O-Ring)
• Built with a muffler and without a bracket
• No service port included

Detailed Description

Four Seasons 66939 is a replacement A/C refrigerant suction hose assembly for the Acura MDX, covering 2019 and 2020 model years. It is built with aluminum and rubber sections to match the routing and vibration demands of the HVAC system, while the male P-nut fittings support proper connection at both ends. The integrated muffler and included seals help complete the suction line service with the correct component layout for R134A applications. If you are replacing a leaking or damaged suction hose on a 2019-2020 Acura MDX, part number 66939 provides the correct fitment details for that repair.

This part cross-references Honda/Acura OE-style numbers such as 80311TYRA02 and A83619 for the same application.

Common Problems This Part Can Address

• Refrigerant loss from a cracked or leaking suction hose
• Damaged hose sections from age, heat, or vibration
• Improper A/C line sealing at the hose connections
• Noisy or inefficient suction line operation in the HVAC circuit
• Service replacement for a worn Acura MDX A/C suction line

Installation Notes and Tips

Verify the vehicle uses R134A refrigerant and confirm the suction line routing before installation. Replace the sealing components during service, inspect the mating surfaces for wear or contamination, and make sure the male P-nut connections are tightened to the correct specification for the vehicle. This part does not include a service port or bracket.

Quality Assurance

Four Seasons states that its mobile A/C products are engineered and tested for long service life, backed by more than 50 years of HVAC experience. Part number 66939 is built to support reliable replacement service on the Acura MDX suction line application.