Heater Hose for 2017-2019 Toyota Highlander & More - Gates 12445

Gates 12445 heater hose for the 2017-2019 Toyota Highlander V6 3.5L and other vehicles carries engine coolant from the cooler to the engine. This Gates molded heater hose, also called an HVAC heater hose, is catalogued for the exhaust gas recirculation cooler to tee run and is sold as one hose.

• Factory-molded hose shaped for smaller, tighter engine compartments
• EPDM tube and cover over a synthetic fiber knit reinforcement
• Temperature range of -40°F to 275°F (-40°C to 135°C)
• Meets SAE 20R3 Type EC Class D-1 and D-2 specifications
• Engineered to resist electrochemical degradation, the leading cause of hose failure
• Gates ThermalPro molded heater hose line

Quick facts

• Part: Gates 12445 heater hose
• Also called: HVAC heater hose
• Fits: 2017-2019 Toyota Highlander V6 3.5L and other vehicles
• Position: Cooler to engine, exhaust gas recirculation cooler to tee
• Material: EPDM, plastic
• Condition: New

A worn heater hose can show up as coolant drips or a sweet smell, a cracked, soft or swollen hose, or a falling coolant level. Before replacing it, look over the hose and both ends with the engine off and cool, since a clamp or connector at an end could be where the coolant is escaping.

Fits

It also fits the 2020-2022 Lexus RX450h V6 3.5L and the 2020-2022 Lexus RX450hL V6 3.5L, as a direct-fit replacement for each of them. Only one hose is needed on the cooler-to-engine run.

Specifications

Installation notes

• Replace the hose clamps each time a new coolant hose is installed.
• Do not use this hose for fuel or oil transfer.

Interchange: F10620 · 13445 · 1628331040

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