HomeHVAC > Motors, Core, Case and Related ComponentsFour Seasons 90078 HVAC Heater Core - Rear
Part #: 90078

Four Seasons 90078 HVAC Heater Core - Rear

Heater Core, Rear
⚙️ 16 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Heater Core, Rear
🚗Fitment: Mitsubishi, Montero Sport
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Four Seasons Heater Core 90078 for Mitsubishi Montero Sport

The Four Seasons Heater Core 90078 is designed specifically for the Mitsubishi Montero Sport, providing reliable heating performance. This aluminum heater core meets or exceeds OEM standards, ensuring compatibility and durability for your vehicle's HVAC system.

Key Features of Four Seasons Heater Core 90078

  • Core dimensions: 4-3/4 inches length, 4-3/8 inches width, and 1-1/8 inches thickness
  • Constructed from durable aluminum for efficient heat transfer
  • Tube diameter: 0.5 inches (12.7 mm) for both inlet and outlet
  • Non-adjustable pipe positioning for direct OEM replacement
  • Meets or exceeds original equipment manufacturer specifications
  • Designed specifically for Mitsubishi Montero Sport models

Detailed Description of the Heater Core 90078

This Four Seasons Heater Core 90078 is an aluminum core designed to replace the factory heater core in Mitsubishi Montero Sport vehicles. The core measures 4.75 inches in height, 4.375 inches in width, and 1.125 inches in depth, providing a precise fit for the HVAC system. The aluminum construction allows for efficient heat exchange, helping to maintain cabin comfort during colder months. Both inlet and outlet tubes have a diameter of 0.5 inches (12.7 mm), matching OEM specifications for seamless installation. The pipe positioning is fixed, ensuring a direct replacement without the need for adjustments.

About the Four Seasons Heater Core Product Line

The Four Seasons Heater Core line focuses on delivering reliable HVAC components that meet or exceed OEM standards. This product line emphasizes quality materials and precise fitment to ensure proper heating performance and durability. The Heater Core 90078 is part of this line, engineered to provide consistent heat transfer and long service life for Mitsubishi Montero Sport vehicles.

Common Issues Addressed by This Heater Core

  • Loss of cabin heat due to clogged or leaking heater core
  • Coolant leaks inside the vehicle causing foggy windows or damp carpets
  • Overheating engine symptoms related to heater core failure
  • Unpleasant odors from a damaged or corroded heater core
  • Reduced HVAC system efficiency impacting passenger comfort

Installation Notes and Tips

  • Ensure the vehicle is fully cooled before beginning installation to avoid burns
  • Drain the cooling system prior to removing the old heater core
  • Verify tube diameters and pipe positioning match the replacement part
  • Inspect and replace any worn hoses or clamps during installation
  • Refill and bleed the cooling system properly to prevent air pockets

Quality Assurance and Warranty

The Four Seasons Heater Core 90078 is manufactured to meet or exceed OEM specifications, ensuring reliable performance and fitment. This part undergoes quality control testing to maintain durability and function. Warranty coverage details should be confirmed with the product provider or manufacturer.

BrandFour Seasons
Part Number90078
PositionHeater Core, Rear
Adjustable Pipe PositioningNo
Core Depth IN1.125
Core Height IN4.750
Core MaterialAluminum
Core Width IN4.375
DescriptionHeater Cores
Length4-3/4
Meets / Exceeds OEM?Yes
StyleAluminum Heater Core
Thickness1-1/8
Tube 1 IN0.500
Tube 1 MM12.700
Tube 2 IN0.500
Tube 2 MM12.700
TypeHeater Core /Aluminum
Width4-3/8

This part fits 16 vehicles. Search below:

YearMakeModelPositionNotes
2012MitsubishiMontero SportRearHeater Core
2011MitsubishiMontero SportRearHeater Core
2010MitsubishiMontero SportRearHeater Core
2009MitsubishiMontero SportRearHeater Core
2008MitsubishiMontero SportRearHeater Core
2007MitsubishiMontero SportRearHeater Core
2006MitsubishiMontero SportRearHeater Core
2005MitsubishiMontero SportRearHeater Core
2004MitsubishiMontero SportRearHeater Core
2003MitsubishiMontero SportRearHeater Core
2002MitsubishiMontero SportRearHeater Core
2001MitsubishiMontero SportRearHeater Core
2000MitsubishiMontero SportRearHeater Core
1999MitsubishiMontero SportRearHeater Core
1998MitsubishiMontero SportRearHeater Core
1997MitsubishiMontero SportRearHeater Core

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

11193078181246120972127972139937155307882314239007890104239307898078HT2176CMR315387MR360705

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.