Toyota 16670-21010 Coolant Control Valve With Bracket

Description:

The Coolant Control Valve with Bracket (16670-21010) is used in Toyota hybrid cooling systems to regulate engine and heater coolant flow between the engine, heater core, and hybrid thermal management circuit. Commonly installed in Toyota Prius 1.5L hybrid vehicles where precise coolant routing is required for engine warm-up efficiency, cabin heating performance, and hybrid system temperature control. Maintenance technicians and hybrid specialists use this valve assembly for cooling system repair, leak correction, and replacement of failed or sticking coolant control valves affecting engine temperature stability and heater performance.

Applications:

The 16670-21010 coolant control valve is commonly used in Toyota Prius Gen 2 hybrid systems (2004–2009) where electronically controlled coolant routing manages engine warm-up, cabin heat delivery, and hybrid system thermal balance to improve fuel efficiency, emissions performance, and drivability in stop-start hybrid operation.

Technical Specifications:

• Manufacturer: OEM
• Model / Part number: 16670-21010
• Product type: Coolant control valve assembly with bracket
• Vehicle compatibility: Toyota Prius 1.5L hybrid (2004–2009, Gen 2)
• Function: Regulates coolant flow between engine, heater core, and hybrid cooling circuits
• Actuation type: Electric motor / solenoid-controlled valve (application dependent)
• Material: Reinforced plastic valve body with metal bracket
• Coolant type: Engine coolant / antifreeze (Toyota SLLC compatible)
• Mounting: Engine bay bracket-mounted assembly
• Function role: Thermal management for engine and cabin heating efficiency
• Application environment: Automotive hybrid cooling and HVAC system
• Operating conditions: High-temperature coolant circulation system

Common Replacements:

• Toyota OEM 16670-21010 coolant control valve assembly
• Denso hybrid coolant flow control valve (Toyota Prius Gen 2 equivalent)
• Aisin coolant bypass / heater control valve assembly for Prius 1.5L engines