Four Seasons 33378 A/C Receiver Drier

Four Seasons 33378 A/C Receiver Drier

The Four Seasons 33378 is an aluminum A/C receiver drier built for HVAC service on select Volkswagen applications. It uses a female O-ring inlet and outlet, includes desiccant, and is supplied as a new filter drier with a service port.

For Volkswagen Cabrio, Golf, and Jetta A/C repair, this receiver drier supports moisture control in the refrigerant circuit and meets or exceeds OEM requirements. The Four Seasons Filter Drier line focuses on direct-fit HVAC service parts, and part number 33378 follows that approach with OE-style connections and dimensions.

Key Features

• Aluminum A/C receiver drier with desiccant
• Female O-ring inlet and outlet fittings
• 3/8 in. inlet and 1/2 in. outlet sizing
• Body diameter: 3.000 in.; body length: 6.750 in.
• Service port included; switch port not included
• Moisture indicator window: no
• Pad mount: w/o pad mount; bracket not included
• New part that meets or exceeds OEM specifications
• Green O-rings included for sealing

Detailed Description

Four Seasons 33378 is an A/C receiver drier for HVAC systems that use a female O-ring connection style. Its aluminum construction, fixed desiccant, and OE-style dimensions make it a direct replacement choice for service work on 1993-1998 Volkswagen Golf, 1993-1998 Volkswagen Jetta, and 1995-2002 Volkswagen Cabrio. This part number 33378 is also referenced across multiple aftermarket catalogs for the same application.

This part cross-references UAC RD10002C and Wix 49114 for the same application.

What It Helps Fix

• Moisture contamination in the A/C system
• Reduced cooling performance caused by a saturated drier
• Refrigerant flow issues related to an aging receiver drier
• Service concerns on Volkswagen Cabrio, Golf, and Jetta HVAC repairs
• Seal leakage at the inlet or outlet O-ring connections

Installation Notes and Tips

• Verify inlet and outlet sizes before installation: 3/8 in. inlet and 1/2 in. outlet.
• Replace O-rings and lubricate them with the correct refrigerant oil during assembly.
• Confirm the system is evacuated and leak-checked after installation.
• Match the female O-ring connection style and the w/o pad mount configuration to the original part.
• Use the service port as required by the vehicle’s A/C service procedure.

Quality Assurance

Four Seasons 33378 is a new replacement part that meets or exceeds OEM specifications. Its OE-style construction and application coverage support accurate service on Volkswagen Cabrio, Golf, and Jetta A/C systems.