Four Seasons 90752 HVAC Heater Core

Four Seasons 90752 Heater Core Overview

The Four Seasons 90752 heater core is an OEM-specific aluminum replacement for select Mazda B-Series trucks. Built for the 1986-1993 Mazda B2000, B2200, and B2600, it is sized for direct-fit HVAC service and consistent cabin heat output.

Four Seasons Heater Core 90752 is part of the brand’s heater core line, focused on replacement components that match application-specific dimensions and material requirements for repair work.

Key Features

• Aluminum heater core construction
• OEM-specific fitment for direct replacement service
• Core dimensions: 7 in. width, 5.75 in. height, 1.25 in. depth
• Tube size: 0.44 in. (17 mm) inlet and outlet
• Designed for Mazda B2000, B2200, and B2600 HVAC repair
• Four Seasons part number 90752 for catalog matching and ordering

Detailed Description

This heater core is engineered for the HVAC system in select Mazda B-Series applications, including the Mazda B2000, Mazda B2200, and Mazda B2600. The aluminum design supports efficient heat transfer and application-specific fitment, making it a practical replacement when servicing the vehicle’s cabin heating system. If you are replacing a leaking or restricted heater core on a 1986-1993 Mazda B-Series truck, Four Seasons 90752 provides the correct dimensions and OEM-specific style for the job. This part cross-references APDI 9010230 for the same application.

What It Helps Fix

• Loss of cabin heat in the Mazda B2000, B2200, or B2600
• Coolant odor or moisture inside the passenger compartment
• Restricted coolant flow through the heater core
• Uneven or weak defrost performance caused by poor heater output
• Leak-related HVAC service on the heater circuit

Installation Notes and Tips

Verify the core dimensions and tube size against the removed unit before installation. Confirm hose routing, inlet and outlet alignment, and HVAC case fitment on the vehicle before reassembly. For best results, inspect the cooling system for contamination or debris that could affect the new heater core after installation.

Quality Assurance

Four Seasons states that its HVAC replacement products are engineered and tested for dependable operation, drawing on more than 50 years of mobile air conditioning experience. The 90752 heater core is built to support long-term service in the specified Mazda B-Series applications.