Four Seasons 90071 HVAC Heater Core - Front

Four Seasons 90071 Heater Core for Land Cruiser and LX470

The Four Seasons 90071 heater core is an aluminum HVAC replacement built for front heater applications in select Toyota and Lexus SUVs. It is engineered to meet or exceed OEM requirements and matches the compact core dimensions needed for proper cabin heat transfer.

Compatible with 1998-2007 Toyota Land Cruiser, front heater core applications and 1998-2003 Lexus LX470, front heater core applications, this Four Seasons heater core supports direct-fit service for vehicles with the listed configurations.

Key Features

• Brand: Four Seasons Heater Core
• Part number: 90071
• Aluminum heater core construction
• Core dimensions: 8-3/4 in. length, 5-3/4 in. width, 1 in. thickness
• Core height: 8.750 in.; core width: 5.750 in.; core depth: 1.000 in.
• Tube size: 0.625 in. on both connections
• Meets or exceeds OEM specifications
• Front position fitment

Product Details

The Four Seasons Heater Core line focuses on HVAC replacement components for heating system service. This 90071 heater core uses aluminum core material and a standard tube layout with fixed pipe positioning, making it a practical replacement for restoring heat output in the cabin. The compact size and OE-level specification support proper fitment in the HVAC case for the listed Toyota Land Cruiser and Lexus LX470 applications. Cross-reference part numbers include UAC HT2088C and OSC 98071 for the same application.

Common Problems This Part Can Address

• Weak or uneven cabin heat
• Coolant seepage inside the HVAC housing
• Restricted heater core flow from age or corrosion
• Fogging or sweet odor caused by heater core leakage
• Loss of heat performance in front HVAC operation

Installation Notes and Tips

Verify the vehicle year, model, and front heater core configuration before installation. Compare the existing core dimensions, tube diameter, and pipe orientation to the specifications listed for part number 90071. Proper cooling system draining, flushing, and air bleeding should be completed during heater core replacement to help protect the new component and restore normal heater performance.

Quality Assurance

This Four Seasons heater core is built to meet or exceed OEM requirements for the listed applications. It is intended for direct replacement service in compatible Toyota Land Cruiser and Lexus LX470 HVAC systems.