Four Seasons 33328 A/C Accumulator

Four Seasons 33328 A/C Accumulator Overview

The Four Seasons Accumulator 33328 is a complete aluminum A/C accumulator built for select Audi and Volkswagen applications. It is an OE-style replacement that meets or exceeds OEM requirements and uses female O-ring inlet and male insert O-ring outlet connections for a direct-fit service solution.

Use this Four Seasons 33328 accumulator when servicing the air conditioning system on compatible Audi A4, Audi A4 Quattro, Audi Cabriolet, Audi 90, Audi 90 Quattro, and Volkswagen Passat models. The accumulator is part of the Four Seasons Accumulator line, which focuses on replacement HVAC components for vehicle-specific A/C repairs.

Key Features

• Part number: 33328
• Four Seasons Accumulator line replacement A/C accumulator
• Aluminum body construction
• Complete unit style
• Female O-ring inlet fitting, 3/4 in. inlet diameter
• Male insert O-ring outlet fitting, 1-1/8 in. outlet diameter
• No service port and no switch port
• Meets or exceeds OEM specifications
• Body diameter: 3.500 in. | Body length: 9.000 in.
• Includes green O-rings, OE reference [24612]

Detailed Description

The Four Seasons 33328 A/C accumulator stores and separates refrigerant oil and moisture from the low-pressure side of the HVAC system, helping maintain proper A/C performance in vehicles that use this configuration. Its aluminum construction, OE-style fitment, and complete-unit design make it a practical replacement for service work on 1993-2001 Audi and Volkswagen platforms. This part cross-references UAC RD4286C for the same application.

Fits 1996-2001 Audi A4, N/A. Fits 1996-2001 Audi A4 Quattro, N/A. Fits 1998-1999 Volkswagen Passat, N/A. Fits 1994-1998 Audi Cabriolet, N/A. Fits 1994-1995 Audi 90, N/A. Fits 1994-1995 Audi 90 Quattro, N/A. Fits 1993 Audi 90, N/A, w/ R134a; Accumulator. Fits 1993 Audi 90 Quattro, N/A, w/ R134a; Accumulator.

What It Helps Address

• Moisture buildup in the A/C system
• Refrigerant oil separation issues
• Loss of cooling performance from a worn accumulator
• Leak concerns at aging O-ring connections
• HVAC service needs after compressor or system repair

Installation Notes and Tips

Verify the inlet and outlet fitting style before installation: female O-ring inlet and male insert O-ring outlet. Confirm the vehicle uses an accumulator configuration without a service port or switch port. Replace O-rings during service and inspect mating surfaces for wear, corrosion, or contamination before reassembly.

Quality Assurance

Four Seasons 33328 is built to meet or exceed OEM requirements for the listed Audi and Volkswagen applications. The part is supplied as an OE-style aluminum accumulator for vehicle-specific HVAC repair.