UAC HT 2086C HVAC Heater Core For 01-03 Toyota Highlander by UAC. UAC HT 2086C HVAC Heater Core For 01-03 Toyota Highlander by UAC Ð a trusted leader in automotive air conditioning components. Designed for superior performance and durability, this part ensures optimal cooling efficiency. Perfect for restoring your vehicleÕs A/C system with OEM-quality reliability.