Four Seasons 33433 A/C Receiver Drier

Four Seasons 33433 Filter Drier Overview

Four Seasons 33433 is a steel A/C receiver drier built for HVAC systems that use a male insert O-ring connection style. It is a new filter drier with desiccant, a sight glass, a service port, and a fuse plug, making it a direct replacement choice for select BMW applications.

Compatible with 1982-1989 BMW 524td, 528e, 533i, 535i, 535is, 635CSi, M5, and M6 applications, this Four Seasons filter drier supports proper refrigerant flow management in the air conditioning system. The Four Seasons 33433 is also listed as an OE-style replacement for multiple cross-reference part numbers used in the same application.

Key Features

• Steel filter drier construction for HVAC service use
• Male insert O-ring inlet and outlet fittings
• Desiccant included to help manage moisture in the A/C system
• Sight glass for visual refrigerant condition checks
• Service port and switch port included in the design
• Fuse plug included
• Meets or exceeds OEM requirements
• New part with gasket/seals included

Product Details

The Four Seasons Filter Drier line is built for replacement service in automotive air conditioning systems where moisture control and refrigerant cleanliness matter. Part number 33433 uses a steel body measuring 3.000 inches in diameter and 6.500 inches in length, with 0.375-inch inlet and outlet fittings. The unit uses a non-replaceable desiccant and includes a green O-ring specification for sealing at the connection points.

This part cross-references Monroe Shocks & Struts (e.g., 172547) and UAC (e.g., RD0953C) for the same application. It is listed for BMW 635CSi, BMW 528e, and BMW 535i service applications, along with additional BMW models from the same era.

Common Problems This Part Helps Address

• Moisture contamination in the A/C refrigerant circuit
• Reduced cooling performance caused by restricted or aged filter drier components
• Service issues related to worn sealing surfaces at the receiver drier
• Loss of refrigerant system cleanliness after component replacement
• Need for a direct replacement receiver drier on select BMW HVAC systems

Installation Notes

• Verify the male insert O-ring fitting style and 0.375-inch inlet/outlet dimensions before installation.
• Replace O-rings and seals during service to maintain proper sealing.
• Inspect the A/C system for contamination before installing the new drier.
• Confirm fitment for the specific BMW model and year listed above, including 1982-1989 BMW 528e, 1985-1989 BMW 635CSi, and 1985-1988 BMW 535i applications.
• Follow standard HVAC evacuation and recharge procedures after installation.

Quality Assurance

Four Seasons 33433 is a new replacement filter drier that meets or exceeds OEM requirements. Its steel construction, included desiccant, and OE-style connection design support consistent service replacement for select BMW A/C systems.