Four Seasons 90031 HVAC Heater Core - Rear

Overview of Four Seasons Heater Core 90031

The Four Seasons Heater Core 90031 is designed specifically for select Lexus and Toyota models, including the 4Runner, Land Cruiser, and LX470. This aluminum heater core provides reliable heating performance and meets or exceeds OEM standards for durability and fit.

• Core dimensions: 4-1/2 inches length, width, and height
• Core thickness/depth: 1-1/8 inches (1.125 inches)
• Constructed from durable aluminum material
• Specific fit for Lexus and Toyota 4Runner, Land Cruiser, and LX470
• Tube diameter: 0.75 inches (19.05 mm) for both inlet and outlet
• Meets or exceeds OEM specifications
• Non-adjustable pipe positioning

Four Seasons Heater Core Product Line Details

The Four Seasons Heater Core product line focuses on delivering precise fit and reliable heating components for automotive HVAC systems. The Heater Core line is engineered to match OEM specifications, ensuring compatibility and performance for specific vehicle applications. The 90031 model is part of this line, offering an aluminum core designed for efficient heat transfer and long-lasting operation in Lexus and Toyota vehicles.

Detailed Product Description

This HVAC heater core features an aluminum core measuring 4.5 inches in length, width, and height, with a thickness of 1-1/8 inches. The aluminum construction provides effective heat dissipation and corrosion resistance, essential for maintaining consistent cabin heating. The heater core includes two tubes, each with a diameter of 0.75 inches (19.05 mm), designed for secure coolant flow. The part number 90031 is a specific fit for Lexus 4Runner, Land Cruiser, and LX470 models, ensuring proper installation without the need for modifications.

Common Applications and Issues Addressed

• Restores heating function in Lexus 4Runner, Land Cruiser, and LX470 HVAC systems
• Replaces leaking or clogged heater cores causing coolant loss
• Eliminates insufficient cabin heat due to core blockages or corrosion
• Prevents engine overheating related to heater core failures
• Resolves unpleasant odors from damaged or deteriorated heater cores

Installation Notes and Tips

• Ensure compatibility with Lexus 4Runner, Land Cruiser, or LX470 before installation
• Drain coolant system prior to heater core removal to avoid spills
• Handle aluminum core carefully to prevent damage to fins and tubes
• Check and replace any worn hoses or clamps during installation
• Bleed the cooling system after installation to remove air pockets

Quality Assurance and Warranty

The Four Seasons Heater Core 90031 meets or exceeds OEM quality standards, providing reliable performance and durability. Manufactured with corrosion-resistant aluminum, this heater core is built to last under normal operating conditions. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.