Denso 478-2045 A/C Receiver Drier

Denso New Receiver Drier 478-2045

Denso New Receiver Drier 478-2045 is an aluminum A/C receiver drier built for BMW HVAC systems that need stable refrigerant flow and moisture control. It is a direct-fit service part for a wide range of BMW 3 Series, 5 Series, 7 Series, X3, Z4, and M models.

The Denso New Receiver Drier line focuses on factory-style fit and consistent A/C performance. This receiver drier uses a block union design with female inlet and outlet fittings, making it a practical replacement when servicing the air conditioning system on BMW applications such as the 2001-2006 BMW 325Ci, 2004-2010 BMW X3, and 1999-2003 BMW 540i.

Key Features

• Brand: Denso New Receiver Drier
• Part number: 478-2045
• Aluminum body construction
• Block union style
• Female inlet fitting and female outlet fitting
• Body diameter: 63.500 mm
• Body length: 165.100 mm
• Built to manage refrigerant flow and help isolate moisture in the A/C system

Detailed Description

The receiver drier is a critical HVAC component that helps regulate liquid and vapor refrigerant while trapping moisture that can damage internal A/C parts. Denso designs this unit to support smooth, surge-free air conditioning operation and to help protect the system from corrosion-related wear. For BMW owners replacing major A/C components, 478-2045 is a service part that matches factory-style requirements for fit and function.

This part cross-references BMW 64 53 8 377 330 and Four Seasons 83070 for the same application. It is also used across multiple BMW platforms, including Fits 2004-2010 BMW X3, N/A; Fits 2003-2008 BMW Z4, N/A; and Fits 2001-2006 BMW M3, N/A.

What It Helps Address

• Moisture contamination inside the A/C system
• Reduced cooling performance from restricted refrigerant flow
• Corrosion inside HVAC components
• Surging or unstable A/C operation
• Service replacement after major air conditioning repairs

Installation Notes and Tips

• Replace the receiver drier during major A/C service or when the system has been opened for repair.
• Verify the block union layout and female fittings before installation.
• Confirm vehicle-specific fitment by model year, since BMW coverage varies by chassis and production date.
• Use proper A/C service procedures to evacuate and recharge the system after replacement.

Quality Assurance

Denso manufactures this receiver drier to factory-level standards as part of its First Time Fit component line. The design is intended to deliver OE-style performance and efficiency for BMW A/C service applications.