Four Seasons 4187NK A/C Compressor and Component Kit

Complete A/C Kit for Mitsubishi Applications

The Four Seasons Complete A/C Kit 4187NK is a complete air conditioning kit with a new compressor for Mitsubishi vehicles using the MSC105CA or MSC105C compressor configuration. It combines the major replacement components needed for an A/C service in one package, including the compressor, filter drier, expansion valve, oil, and O-rings.

Built for R134a systems, this kit is a direct-fit service solution for Mitsubishi Galant, Eclipse, and Endeavor models listed below. The Four Seasons Complete A/C Kit line is organized to simplify compressor replacement by matching the core components required for a proper repair.

Key Features

• Four Seasons part number 4187NK
• Complete air conditioning kit with new compressor
• Includes compressor oil
• Refrigerant type: R134a
• Expansion device type: block type
• Expansion valve inlet and outlet: insert O-ring
• Gaskets and seals included
• Receiver drier/accumulator included with pad mount fittings
• Limited lifetime warranty

Detailed Description

This A/C compressor kit is built around a new compressor and the supporting components needed for a full system repair. The kit includes 78497 new compressor, 83125 filter drier, 39179 expansion valve, 59007 oil, and O-rings. It is intended for Mitsubishi systems that use the MSC105CA compressor, with one listed application using the MSC105C compressor.

Use Four Seasons 4187NK when servicing a Mitsubishi Galant, Mitsubishi Eclipse, or Mitsubishi Endeavor with the matching factory A/C setup. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 2004-2012 Mitsubishi Galant, N/A — w/ MSC105CA Compressor; Includes: 78497 (New Compressor), 83125 (Filter Drier), 39179 (Exp Valve), 59007 (Oil), O-Rings; Complete A/C Kit
• Fits 2006-2009 Mitsubishi Eclipse, N/A — w/ MSC105CA Compressor; Includes: 78497 (New Compressor), 83125 (Filter Drier), 39179 (Exp Valve), 59007 (Oil), O-Rings; Complete A/C Kit
• Fits 2010 Mitsubishi Eclipse, N/A — w/ MSC105C Compressor; Includes: 78497 (New Compressor), 83125 (Filter Drier), 39179 (Exp Valve), 59007 (Oil), O-Rings; Complete A/C Kit
• Fits 2011 Mitsubishi Eclipse, N/A — w/ MSC105CA Compressor; Includes: 78497 (New Compressor), 83125 (Filter Drier), 39179 (Exp Valve), 59007 (Oil), O-Rings; Complete A/C Kit
• Fits 2011 Mitsubishi Endeavor, N/A — w/ MSC105CA Compressor; Includes: 78497 (New Compressor), 83125 (Filter Drier), 39179 (Exp Valve), 59007 (Oil), O-Rings; Complete A/C Kit

Common Repair Uses

• Restores cooling performance after compressor failure
• Addresses low cabin air temperature caused by worn A/C components
• Replaces a contaminated or inefficient compressor assembly
• Supports repair of moisture-related A/C system issues with a new filter drier
• Helps correct expansion valve-related refrigerant flow problems

Installation Notes and Tips

Verify compressor style and system configuration before installation, especially the MSC105CA or MSC105C application callout. Replace the receiver drier and expansion valve during compressor service, and follow proper evacuation, oil balancing, and recharge procedures for R134a systems. Confirm all O-ring and seal interfaces are clean and properly seated before charging the system.

Quality Assurance

Four Seasons 4187NK is backed by a limited lifetime warranty. The kit is assembled for complete A/C service on the listed Mitsubishi applications and includes the core replacement components needed for a proper repair.