Four Seasons 91460 HVAC Heater Core

Four Seasons 91460 Heater Core Overview

The Four Seasons 91460 heater core is a copper/brass HVAC replacement built for direct-fit service in select Dodge and Mitsubishi applications. It is sized to match the original unit and meets or exceeds OEM requirements for the listed vehicles.

Compatible with 1987-1995 Dodge Colt, 1992-1995 Mitsubishi Expo, 1992-1994 Mitsubishi Expo LRV, and 1989-1992 Mitsubishi Mirage, this heater core is designed for vehicles that need dependable cabin heat and stable coolant-to-air transfer. Four Seasons heater core 91460 is a practical OE-style replacement for repair work on these compact platforms.

Key Features

• Four Seasons heater core, part number 91460
• Copper core material with copper/brass heater core construction
• Core dimensions: 7-3/4 in. length, 6-3/8 in. width, 1-1/4 in. thickness
• Core height: 7.750 in.; core width: 6.375 in.; core depth: 1.250 in.
• Tube size: 0.625 in. on both connections
• Meets or exceeds OEM specifications
• Direct replacement style for listed Dodge Colt and Mitsubishi models

Product Details

This heater core transfers heat from engine coolant into the HVAC system so the cabin can receive warm air through the dash vents. The copper/brass design supports efficient heat exchange and is matched to the listed fitments for proper case integration. If you are replacing a leaking or restricted heater core in a Mitsubishi Mirage, Mitsubishi Expo, Mitsubishi Expo LRV, or Dodge Colt, Four Seasons 91460 provides the correct size and connection layout for the application.

This part cross-references APDI 9010238 and Carlson H5136 for the same application.

Common Problems This Part Can Help Solve

• No heat or weak cabin heat output
• Coolant odor inside the vehicle
• Fogging or film on the windshield from heater core leakage
• Coolant loss traced to the HVAC case
• Restricted coolant flow through the heater circuit

Installation Notes and Tips

Verify the original heater core dimensions and tube orientation before installation. Inspect heater hoses, clamps, and the HVAC case for wear or contamination while the system is open. Flush the cooling system if debris or corrosion is present, and refill with the correct coolant mixture after installation. Because adjustable pipe positioning is not included, confirm the tube alignment matches the vehicle before final assembly.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM requirements for the specified applications. The copper/brass construction and application-specific sizing support a direct replacement approach for service on the listed Dodge and Mitsubishi vehicles.