Four Seasons 90036 HVAC Heater Core

Four Seasons 90036 Heater Core for Lexus LS400

Four Seasons 90036 is a specific-fit aluminum heater core for select Lexus LS400 applications. It is built to meet or exceed OEM requirements and is sized for direct replacement in the HVAC heater core location.

Key Features

• Specific-fit heater core for confirmed Lexus LS400 applications
• Aluminum core material for efficient heat transfer
• Core dimensions: 10 in. height, 5-7/8 in. width, 1 in. depth
• Tube size: 0.625 in. / 16.256 mm
• Meets or exceeds OEM specifications
• Four Seasons Heater Core line, part number 90036

Product Details

This Four Seasons heater core is designed for HVAC heating performance in the Lexus LS400. The aluminum heater core construction supports consistent coolant-to-air heat exchange, while the specific-fit design helps match the original heater core dimensions and tube sizing. Use Four Seasons 90036 when replacing a leaking, restricted, or inefficient heater core on 1995 Lexus LS400 from 10/94 and 1996-2000 Lexus LS400 models. This part cross-references Spectra Premium 98036 for the same application.

Common Problems This Part Can Address

• Loss of cabin heat from a leaking or clogged heater core
• Sweet coolant odor inside the vehicle from heater core seepage
• Fogging or film on the windshield caused by HVAC coolant leakage
• Uneven or weak heat output from restricted coolant flow
• Coolant loss traced to the HVAC heater core assembly

Installation Notes and Tips

Verify the vehicle build date before ordering, especially for 1995 Lexus LS400 models from 10/94. Compare the original core dimensions, tube diameter, and hose routing before installation. Flush the cooling system and inspect related HVAC components, hoses, and seals during replacement to help prevent repeat contamination or flow issues.

Quality Assurance

Four Seasons 90036 is manufactured as an OEM-level replacement heater core and is listed as meeting or exceeding OEM specifications. The Four Seasons Heater Core line is built for direct-fit HVAC service on confirmed applications, including Lexus LS400 models.