HomeHVAC > Motors, Core, Case and Related ComponentsFour Seasons 90749 HVAC Heater Core
Part #: 90749

Four Seasons 90749 HVAC Heater Core

Heater Core
⚙️ 12 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$75.16Free Shipping
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Heater Core
🚗Fitment: Acura and Honda, Civic, CRX, and Integra
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Heater Core Replacement for Acura and Honda Vehicles

The Four Seasons Heater Core 90749 is designed to restore efficient heating performance in select Acura and Honda models. Engineered with durable aluminum construction, this heater core ensures consistent heat transfer and long-lasting operation for your Civic, CRX, or Integra.

  • Core dimensions: 7-7/8 inches length, 5 inches width, 2 inches thickness
  • Constructed from corrosion-resistant aluminum material
  • Tube diameter: 0.625 inches (15.875 mm) for both inlet and outlet
  • Meets or exceeds OEM specifications for reliable fit and function
  • Non-adjustable pipe positioning for straightforward installation

About the Four Seasons Heater Core Product Line

The Four Seasons Heater Core line focuses on delivering quality HVAC components that meet or exceed original equipment manufacturer standards. This aluminum heater core model 90749 is part of that line, offering a balance of durability and performance tailored for specific Acura and Honda vehicles. The use of aluminum enhances heat dissipation while resisting corrosion, contributing to the longevity of the heating system.

Detailed Product Description

This HVAC heater core features a compact design with a core height of 7.875 inches and a core depth of 2 inches, making it compatible with the heating systems of Acura Civic, Honda CRX, and Integra models. The aluminum core material provides efficient heat transfer and resistance to rust, which is critical for maintaining cabin comfort during colder months. Both inlet and outlet tubes measure 0.625 inches in diameter, ensuring proper coolant flow through the core. The heater core 90749 is engineered to meet or exceed OEM standards, providing a direct replacement that maintains factory performance.

Common Applications and Issues Addressed

  • Restores heating function in Acura Civic, Honda CRX, and Integra vehicles
  • Resolves coolant leaks within the heater core assembly
  • Eliminates reduced cabin heat output caused by clogged or damaged cores
  • Prevents overheating issues related to faulty heater cores
  • Addresses corrosion and deterioration in aging HVAC systems

Installation Notes and Tips

When replacing the heater core 90749, ensure the cooling system is properly drained before removal. Due to the non-adjustable pipe positioning, verify alignment with existing HVAC hoses for a secure fit. Inspect surrounding components for wear or damage during installation to avoid future leaks. Properly bleed the cooling system after installation to prevent air pockets and ensure optimal heater performance.

Quality Assurance and Warranty

The Four Seasons Heater Core 90749 is manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. This part undergoes rigorous quality control to maintain consistent standards. Please refer to Four Seasons' warranty policy for specific coverage details related to this heater core.

BrandFour Seasons
Part Number90749
PositionHeater Core
Length7-7/8
Thickness2
Width5
Core MaterialAluminum
Adjustable Pipe PositioningNo
Core Depth IN2
Core Height IN7.875
Core Width IN5
DescriptionHeater cores
Meets / Exceeds OEM?Yes
StyleAluminum heater core
Tube 1 IN0.625
Tube 1 MM15.875
Tube 2 IN0.625
Tube 2 MM15.875
TypeHeater core /aluminum

This part fits 12 vehicles. Search below:

YearMakeModelPositionNotes
1993AcuraIntegraN/AHVAC Heater Core with Aluminum Design; Heater Core
1992AcuraIntegraN/AHVAC Heater Core with Aluminum Design; Heater Core
1991AcuraIntegraN/AHVAC Heater Core with Aluminum Design; Heater Core
1991HondaCivicN/AAluminum Design; Heater Core
1991HondaCRXN/AAluminum Design; Heater Core
1990AcuraIntegraN/AHVAC Heater Core with Aluminum Design; Heater Core
1990HondaCivicN/AAluminum Design; Heater Core
1990HondaCRXN/AAluminum Design; Heater Core
1989HondaCivicN/AAluminum Design; Heater Core
1989HondaCRXN/AAluminum Design; Heater Core
1988HondaCivicN/AAluminum Design; Heater Core
1988HondaCRXN/AAluminum Design; 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:

39832679110SH3A0079110SH3A0179110SK7A019010266907499474998749HT398326

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