Dorman 973-577 HVAC Blower Motor Resistor Kit

Dorman 973-577 HVAC Blower Motor Resistor Kit

This Dorman HVAC blower motor resistor kit restores blower speed control on select Toyota Sienna models. It includes a replacement resistor and harness pigtail for vehicles with an overheated or corroded original connector, helping address common HVAC electrical failures.

• Direct replacement blower motor resistor kit for select Toyota Sienna applications
• Includes a replacement wire harness pigtail for damaged or heat-affected connectors
• Blade-style terminals with a 4-wire harness layout
• Male connector and male terminal design for the specified application
• Includes a gasket or seal for the installation interface
• Part number 973-577 for easy identification and ordering

Detailed Product Overview

Dorman 973-577 is built for HVAC blower motor resistor replacement where the original resistor has failed from heat damage, corrosion, or connector wear. The kit is intended for 2003-2010 Toyota Sienna blower motor resistor service and addresses the electrical connection at the resistor with a matching harness pigtail. If you are searching for a Toyota Sienna blower motor resistor kit, Dorman 973-577 provides the resistor and connector repair components needed for a proper service replacement.

This part cross-references 4P1643 and 8713808070 for the same application. The Dorman 973-577 part number is also commonly searched as a replacement blower resistor kit for Toyota Sienna HVAC repair.

What It Helps Fix

• Blower motor speeds that stop working or work intermittently
• Heat-damaged resistor connectors
• Corroded HVAC electrical terminals
• Loss of one or more fan speed settings
• Electrical resistance issues at the blower motor resistor circuit

Installation Notes and Tips

Verify the connector style, terminal count, and harness layout before installation. This kit uses a 15.7-inch wiring harness, blade terminals, 4 wires, and 2 mounting holes. Mounting hardware is not included. For best results, inspect the blower motor connector and surrounding wiring for heat damage before installing the new resistor and pigtail.

Quality Assurance

Dorman supplies replacement electrical and HVAC service parts engineered to match the original application requirements for the listed Toyota Sienna model years. Confirm fitment by year, make, and model before ordering Dorman 973-577.