Four Seasons 50018SK A/C Compressor Replacement Service Kit

Four Seasons A/C Service Kit for Armada and QX56

The Four Seasons 50018SK A/C Compressor Replacement Service Kit is built for Nissan Armada and INFINITI QX56 applications that need a complete air conditioning service solution. It includes the key components needed to address compressor replacement service work while supporting R134a and R1234yf refrigerant systems.

Four Seasons A/C Installer Kits are part of a product line focused on mobile A/C service coverage, with components engineered and tested for dependable operation. The 50018SK kit is assembled for technicians and DIY repairers who want the right service parts for a proper A/C repair on select Armada and QX56 models.

Key Features

• Includes compressor oil, filter drier, expansion valve, rear expansion valve, necessary O-rings and gaskets, and cap and valve kit
• PAG 46 compressor oil included; compatible with R1234yf and R134a systems
• Block-type expansion device
• Expansion valve inlet uses O-ring connection; outlet uses insert O-ring connection
• Receiver drier/accumulator dimensions: 1.563 in. diameter and 18.11 in. length
• Pad-mount outlet fitting size: .482 in.
• Limited lifetime warranty

Detailed Description

Four Seasons 50018SK is an A/C Compressor Replacement Service Kit for 2005-2015 Nissan Armada and 2005-2010 INFINITI QX56 models. It is built around the service parts commonly needed when replacing or restoring A/C compressor-related components, including the filter drier, expansion valves, compressor oil, seals, and valve service items. This part cross-references UAC AK2043 for the same application.

Use this kit when servicing an Armada or QX56 A/C system that requires a matched set of replacement service components. The included PAG 46 oil is specified for use with R1234yf and R134a refrigerants, making the kit suitable for modern retrofit and repair work where refrigerant compatibility matters. Part number 50018SK is also listed under Four Seasons and interchange references for the same vehicle coverage.

What It Helps Address

• Compressor replacement service on Nissan Armada and INFINITI QX56 A/C systems
• Leaking or worn expansion valve connections
• Contaminated or depleted compressor oil during A/C repair
• Seal and gasket replacement needs at service points
• Receiver drier service during compressor-related maintenance

Installation Notes and Tips

Verify refrigerant type before service and confirm the vehicle application against the listed fitment. Replace the receiver drier and related sealing components during compressor service, and follow the vehicle manufacturer’s evacuation, vacuum, and recharge procedures. Confirm all O-ring and gasket sealing surfaces are clean before assembly. Fits 2005-2015 Nissan Armada, N/A. Fits 2005-2010 INFINITI QX56, N/A.

Quality Assurance

Four Seasons states that its products are engineered and tested for long service life and backed by more than 50 years of mobile A/C experience. Part number 50018SK includes a limited lifetime warranty.