NOVAPARTS Coolant Flow Control Valve for Toyota Prius 2004-2009 1.5L — 3-Port Bracketed Direct-Fit Replacement

NOVAPARTS Coolant Flow Control Valve (heater control water valve) is a direct-fit replacement that regulates coolant flow for 2004–2009 Toyota Prius 1.5L hybrid engines to restore proper engine temperature management.

This aftermarket coolant control valve from NOVAPARTS replaces OEM part numbers 16670-21010, 1667021010, 601-021 and EHV116. Built as a direct replacement assembly with bracket and three-port plumbing (1 input, 2 outputs), it restores the heater and engine coolant routing that can degrade over time. The valve is made for the 2004–2009 Toyota Prius 1.5L four-cylinder hybrid and aims to reduce repair time and cost by fitting without modification.

How will this valve affect my Prius’s temperature control?

Reinstalling a properly functioning coolant flow control valve ensures coolant is routed correctly between engine, heater core, and bypass circuits. That helps the engine reach and maintain its designed operating range and restores cabin heat control when needed.

• Direct-fit for Toyota Prius 2004–2009 1.5L L4 hybrid models.
• Three-port design: one inlet and two outlets for correct coolant routing.
• Replaces OEM numbers 16670-21010 / 1667021010 / 601-021 / EHV116.
• Bracketed assembly for straightforward mounting and alignment.

Will this part be easy to install and save me money?

The NOVAPARTS valve is designed as a direct replacement so professional or competent DIY mechanics can swap it without modifying existing hoses or mounts. Replacing a failing valve can prevent downstream damage and costly repairs from engine overheating or improper cabin heating.

• Direct replacement saves time compared with custom or universal parts.
• Fits the original mounting points and bracket locations.
• Reduces the chance of follow-on repairs by restoring correct coolant routing.

What exact vehicles and part numbers does this unit match?

This coolant control valve is matched to the Toyota Prius model years 2004 through 2009 with the 1.5L hybrid 4-cylinder engine. It cross-references several OEM and aftermarket numbers so you can confirm compatibility before purchase.

• Compatible: Toyota Prius 2004–2009, 1.5L L4 Hybrid.
• Cross-reference: 16670-21010, 1667021010, 601-021, EHV116, 8211366, 74912.
• Assembly includes bracket for correct factory-style installation.

What warranty and service support come with the NOVAPARTS valve?

NOVAPARTS offers customer support and a 365-day service window to request a replacement or refund if the part arrives defective or fails prematurely. This reduces risk when buying an aftermarket solution for an older vehicle.

• 365-day service support for replacement or refund.
• Quality-controlled aftermarket manufacturing to meet fitment expectations.
• Clear cross-reference numbers to verify correct part selection.

Who is this for: This coolant flow control valve is intended for Toyota Prius owners and repair shops working on 2004–2009 Prius 1.5L hybrid vehicles who need a direct replacement for a faulty heater control or coolant routing valve. It suits DIY mechanics seeking a straightforward swap, independent garages that service hybrid vehicles, and owners looking to restore cabin heating and reliable engine temperature control without purchasing an OEM-priced part.