Nissens 707090 HVAC Heater Core

Nissens 707090 HVAC Heater Core

The Nissens 707090 HVAC heater core is built for direct-fit replacement in select Toyota, Scion, and Lexus applications. It uses aluminum for both the core and tanks, with brazed cooling fins for efficient heat transfer and stable cabin heat output.

Compatible with Toyota RAV4, Toyota Prius, Toyota Corolla, Scion iM, and Lexus CT200h applications, this heater core is a practical choice when the original unit is leaking, restricted, or no longer delivering consistent heat. Part number 707090 is engineered to match the listed vehicle fitments and thermal requirements.

Key Features

• Aluminum core material for lightweight thermal performance
• Aluminum tank material for corrosion-resistant construction
• Brazed cooling fins for efficient heat exchange
• Pipe included for a more complete replacement assembly
• OE-style fitment for select Toyota, Scion, and Lexus models
• Cross-reference part numbers: 8710702150, 8710742170

Detailed Description

Nissens develops thermal management components with a focus on consistent manufacturing quality and aftermarket fitment. The 707090 HVAC heater core follows that approach with an aluminum core and aluminum tanks, plus brazed cooling fins to support efficient cabin heat transfer. Its compact dimensions and included pipe make it suitable for replacement work where the original heater core has failed or performance has declined. This part number 707090 is listed for multiple Toyota RAV4, Toyota Prius, and Toyota Corolla applications, along with Scion iM and Lexus CT200h coverage.

What It Helps Address

• Cool air from the vents when the heater should be producing heat
• Coolant seepage from a leaking heater core
• Uneven or weak cabin heat output
• Restricted coolant flow through the heater circuit
• Fogging or moisture issues caused by heater core leakage

Installation Notes and Tips

Verify the vehicle’s year, make, model, and build notes before installation, especially for Toyota Corolla Japan-built vehicles and the 2006 Toyota RAV4 from 11/2005. Confirm the existing heater core dimensions and pipe configuration against the replacement unit before disassembly. After installation, refill and bleed the cooling system according to factory procedure to remove trapped air and restore proper heater performance.

Quality Assurance

Nissens is a recognized manufacturer of thermal and engine efficiency components, and its aftermarket parts are developed and produced to consistent quality standards. The 707090 heater core is built to support reliable replacement service in the listed applications.