Universal Air HT400021C HVAC Heater Core - Rear

Rear Heater Core for Toyota Highlander

Universal Air HT400021C is a rear HVAC heater core for the Toyota Highlander. It is listed for 2008-2019 Toyota Highlander rear applications and is built as an aluminum heater core for the rear climate system.

Key Features

• Heater core aluminum construction
• Rear HVAC application
• Direct fit for 2008-2019 Toyota Highlander rear heater core replacement
• Universal Air BrandLine: Heater Core Aluminum
• Part number HT400021C for ordering and cross-checking

Detailed Description

This Universal Air HVAC heater core is intended for rear climate control service on the Toyota Highlander. The aluminum core construction supports heat transfer within the rear HVAC case, making it a practical replacement when the original rear heater core is leaking, restricted, or no longer delivering consistent cabin heat. Fits 2008-2019 Toyota Highlander, rear. The part number HT400021C is also useful when verifying the correct rear heater core for Toyota Highlander HVAC repair work.

Universal Air’s Heater Core Aluminum line identifies the product as an aluminum-core HVAC replacement component rather than a generic universal part. For buyers searching for a rear heater core for 2008-2019 Toyota Highlander, rear, HT400021C provides a clear match for the listed application.

Common Repair Symptoms

• Weak or uneven rear cabin heat
• Coolant odor inside the vehicle
• Moisture or fogging from a leaking heater core
• Restricted coolant flow through the rear HVAC circuit
• Rear climate system not responding as expected

Installation Notes and Tips

Verify the rear HVAC configuration before replacement and compare the old unit to HT400021C for core dimensions, inlet and outlet orientation, and mounting points. Flush the cooling system if contamination or debris is present, and inspect hoses, clamps, and seals during service. On Toyota Highlander rear heater core replacement jobs, access may require removal of interior HVAC components, so confirm the repair procedure before beginning work.

Quality Assurance

Universal Air identifies this part within its Heater Core Aluminum product line. Confirm fitment by year, make, model, and rear position before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.