HomeHVAC > Motors, Core, Case and Related ComponentsFour Seasons 91523 HVAC Heater Core
Part #: 91523

Four Seasons 91523 HVAC Heater Core

Heater Core
⚙️ 13 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
🚗Fitment: Dodge, Charger, Magnum, and Monaco
🔄Easy Returns — Return within 60 days for a full refund
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Reliable Heater Core Replacement for Dodge Vehicles

The Four Seasons Heater Core 91523 is designed to restore efficient heating performance in your Dodge Charger, Magnum, or Monaco. Engineered with durable copper and brass materials, this heater core ensures consistent heat transfer and long-lasting operation.

  • Core dimensions: 8 inches length, 6-3/4 inches width, 2 inches thickness
  • Constructed from copper/brass for enhanced thermal conductivity
  • Core depth and height both measure 2 inches and 8 inches respectively
  • Tube sizes: 0.5 inch (12.7 mm) and 0.625 inch (15.875 mm)
  • Meets or exceeds OEM specifications for reliable fit and function

About the Four Seasons Heater Core Product Line

The Four Seasons Heater Core line focuses on providing high-quality HVAC heater cores that meet or exceed original equipment manufacturer standards. This product line emphasizes durability and precise fitment, making it suitable for specific vehicle applications such as the Dodge Charger, Magnum, and Monaco. The 91523 part number represents a copper/brass heater core designed for effective heat transfer and corrosion resistance.

Product Details and Specifications

This HVAC heater core features a copper core material that offers superior heat conduction compared to aluminum alternatives. The core measures 8 inches in length and height, with a width of 6-3/4 inches and a thickness of 2 inches, providing a compact yet efficient design. The two inlet/outlet tubes measure 0.5 inch and 0.625 inch in diameter, ensuring compatibility with the vehicle's existing HVAC plumbing. The fixed pipe positioning means the tubes are not adjustable, so proper fitment is critical for installation.

Common Applications and Issues Addressed

  • Restores heating performance in Dodge Charger, Magnum, and Monaco models
  • Replaces leaking or clogged heater cores causing coolant loss
  • Eliminates insufficient cabin heat due to core blockages
  • Prevents engine overheating related to heater core failures
  • Resolves unpleasant odors from coolant leaks inside the vehicle

Installation Notes and Tips

Ensure compatibility with your specific Dodge model before installation. The heater core's fixed pipe positioning requires careful alignment with existing HVAC hoses. It is recommended to flush the cooling system prior to installation to prevent contamination. Professional installation is advised to avoid damage to the core or HVAC system components.

Quality Assurance and Warranty

The Four Seasons Heater Core 91523 meets or exceeds OEM standards, providing reliable performance and durability. Manufactured with corrosion-resistant copper and brass materials, this heater core is built to last. Please refer to Four Seasons' warranty policy for specific coverage details.

BrandFour Seasons
Part Number91523
PositionHeater Core
Length8
Thickness2
Width6-3/4
Core MaterialCopper
Adjustable Pipe PositioningNo
Core Depth IN2.000
Core Height IN8.000
Core Width IN6.750
DescriptionHeater cores
Meets / Exceeds OEM?Yes
StyleCopper/brass heater core
Tube 1 IN0.500
Tube 1 MM12.700
Tube 2 IN0.625
Tube 2 MM15.875
TypeHeater core /copper brass

This part fits 13 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1978DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater Core
1978DodgeMagnumN/Aw/o AC; Heater Core
1978DodgeMonaco3.7LL6N/ACompatible with models that do not have air conditioning.; Heater Core
1977DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater Core
1977DodgeMonaco3.7LL6N/ACompatible with models that do not have air conditioning.; Heater Core
1976DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater Core
1976DodgeMonacoN/Aw/o AC; Heater Core
1975DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater Core
1975DodgeMonacoN/Aw/o AC; Heater Core
1974DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater Core
1973DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater Core
1972DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater Core
1971DodgeChargerN/ACompatible with models that do not have air conditioning.; Heater 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:

1812133218325015327923630901435037163579171383809939415255452366031047021839010117901119111915239452398523CR9111H2227ZH153

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