Four Seasons 4634NK A/C Compressor and Component Kit

Complete A/C Kit for Nissan Sentra

Restore air conditioning performance with the Four Seasons Complete A/C Kit 4634NK. This complete air conditioning kit includes a new compressor, filter drier, expansion valve, oil, and O-rings for a direct repair on select Nissan Sentra models with a DCS171C compressor.

Built for 2007-2012 Nissan Sentra applications, this Four Seasons Complete A/C Kit is a practical solution when the compressor, drier, or expansion valve has failed and the system needs a full service approach. The 4634NK kit is set up for R134a refrigerant and uses a block-type expansion device with insert O-ring inlet and outlet connections.

Key Features

• Four Seasons Complete A/C Kit, part number 4634NK
• Includes a new compressor, filter drier, expansion valve, oil, and O-rings
• Designed for R134a refrigerant systems
• Block-type expansion device with insert O-ring inlet and outlet fittings
• Receiver drier/accumulator uses pad mount inlet and outlet fittings
• Limited lifetime warranty
• Fits 2007-2012 Nissan Sentra with DCS171C compressor

Product Details

The Four Seasons Complete A/C Kit 4634NK is a complete air conditioning kit with a new compressor for select Nissan Sentra vehicles. It combines the major service components needed for an A/C repair into one application-specific package, helping simplify parts selection for the 2007-2012 Nissan Sentra platform. The kit includes compressor oil and sealing components, along with a filter drier and expansion valve matched to the system configuration.

This part cross-references Raybestos Brakes MK1041 for the same application.

Common A/C Problems This Kit Can Address

• Loss of cooling performance from a worn or seized compressor
• Moisture contamination after compressor or system failure
• Restricted refrigerant flow caused by a failing expansion valve
• System contamination that requires replacement of the filter drier
• Leaks at service connections where O-rings and seals need renewal

Installation Notes

Verify the vehicle uses a DCS171C compressor before ordering. Replace the receiver drier and expansion valve during compressor service to help support proper system operation. Follow the vehicle service manual for evacuation, oil balancing, and recharge procedures when servicing R134a air conditioning systems on the Nissan Sentra.

Quality Assurance

Four Seasons backs this kit with a limited lifetime warranty. The 4634NK is built as a complete A/C service solution for the specified Nissan Sentra fitment and includes the core components needed for a full compressor-related repair.