Denso 478-2100 A/C Receiver Drier

Denso New Receiver Drier for Mazda A/C Service

Denso 478-2100 is a New Receiver Drier built for Mazda A/C systems that need moisture control and stable refrigerant flow. It is a direct-fit HVAC service part for Mazda 2, Mazda 5, and Mazda 3 applications, with aluminum construction and female inlet and outlet fittings.

The Denso New Receiver Drier line focuses on restoring proper A/C system function after major service. This receiver drier uses a desiccant package to help remove moisture from the refrigerant circuit, which supports corrosion prevention inside the system and helps maintain smooth, surge-free operation.

Key Features

• Part number: 478-2100
• Brand: Denso New Receiver Drier
• Category: A/C Receiver Drier for HVAC service
• Aluminum body construction
• Block union design
• Female inlet fitting and female outlet fitting
• Body diameter: 44.450 mm
• Body length: 171.450 mm
• Built to factory-style specifications for Mazda A/C repair

Detailed Description

Denso 478-2100 is an A/C receiver drier designed for Mazda vehicles that require moisture removal and refrigerant flow management during air conditioning service. It is compatible with 2004-2009 Mazda 3, 2006-2010 Mazda 5, and 2011-2014 Mazda 2, making it a direct replacement for common Mazda HVAC repair needs. This part cross-references Four Seasons 83031 for the same application.

As part of Denso’s New Receiver Drier line, this component is intended to support system efficiency after compressor replacement, line repair, or other major A/C work. The desiccant inside the unit helps isolate moisture from the refrigerant circuit, reducing the risk of internal corrosion and helping preserve system performance. For Mazda 3, Mazda 5, and Mazda 2 A/C service, 478-2100 provides a factory-style replacement option with the correct block union layout and female fittings.

Common A/C Problems This Part Helps Address

• Moisture contamination in the A/C system
• Internal corrosion caused by trapped water in the refrigerant circuit
• Reduced cooling performance after major A/C repairs
• Unstable or surge-prone refrigerant flow
• Premature wear of internal A/C components

Installation Notes and Tips

Replace the receiver drier during major A/C service, especially when the system has been opened for compressor, condenser, or line repairs. Verify the block union layout, female inlet and outlet fittings, and body dimensions before installation. Proper evacuation and recharge procedures are important after replacement to help the system operate correctly.

Compatible With: 2004-2009 Mazda 3, 2006-2010 Mazda 5, and 2011-2014 Mazda 2. Use Denso 478-2100 when servicing these Mazda A/C systems that require a New Receiver Drier.

Quality Assurance

Denso manufactures this receiver drier to stringent factory standards as part of its First Time Fit component line, with an emphasis on OE-style fit and consistent A/C system performance.