Heater Coolant Control Valve for 2004-2009 Toyota Prius 1.5L L4 16670-21010 New

Heater Coolant Control Valve for Toyota Prius

This heater coolant control valve regulates coolant flow through the heater core on 2004-2009 Toyota Prius 1.5L L4 models, crossing to OEM part number 16670-21010.

Overview

This heater coolant control valve is a direct-fit replacement for the factory unit on the 2004-2009 Toyota Prius 1.5L L4. The valve controls coolant circulation into the cabin heater core, letting the climate system deliver consistent heat. It is built for Prius owners and independent shops handling cooling system repairs.

Built For Performance

• Direct-fit replacement for OEM part number 16670-21010
• Controls coolant flow to the heater core for consistent cabin heat
• Constructed for reliable sealing against coolant leakage
• Compatible with the 1.5L L4 hybrid cooling system
• Simple bolt-on installation with no modification required

Fits These Machines

• for Toyota Prius 2004 1.5L L4
• for Toyota Prius 2005 1.5L L4
• for Toyota Prius 2006 1.5L L4
• for Toyota Prius 2007 1.5L L4
• for Toyota Prius 2008 1.5L L4
• for Toyota Prius 2009 1.5L L4

On-The-Job Use

• Restoring cabin heat when the original valve fails or sticks
• Cooling system repairs on high-mileage Prius vehicles
• Routine maintenance alongside heater core or thermostat service
• Fixing coolant leaks traced to the heater control valve

Specs At A Glance

Good To Know

Q: Will this valve fit my 2006 Prius? A: It is listed for 2004-2009 Toyota Prius models with the 1.5L L4 engine. Confirm your model year and engine before ordering.

Q: Does the part number matter? A: Yes, this valve crosses to 16670-21010. Matching the number on your original part helps ensure proper fit and function.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.