Replace an overheated or corroded blower resistor and its wiring connector in one job with the Dorman blower motor resistor kit, part number 973-577. It installs as a direct replacement for the original equipment resistor on the 2003-2010 Toyota Sienna. See the "Vehicles it fits" section for engine details.
The blower motor resistor controls the speeds of the HVAC blower motor, which is how the fan steps through its settings. Dorman considers the harness pigtail essential for most repairs, so this Dorman blower motor resistor kit supplies a new pigtail along with the resistor.
- Direct replacement: this resistor and harness kit is designed to directly replace the original equipment on the listed applications.
- Resistor plus pigtail: every kit comes with both a resistor and a harness pigtail.
- Performs like the original: made to perform like original equipment, helping bring back normal HVAC blower operation when the resistor is at fault.
- Engineering support: backed by a team of engineers and quality specialists in the USA.
Signs a blower motor resistor may need replacing include a blower that runs on only some speed settings, a fan that works only on high, or no blower operation at all. Diagnose the cause before replacing, since the blower motor, switch or wiring can produce similar symptoms.
Interchange: 4P1643 · RU1390 · 20669 · RU701 · 8713808070 · JA1765
This part cross-references / interchanges with the following part numbers:
4P1643, RU1390, 20669, RU701, 8713808070, JA1765
Frequently Asked Questions
What comes in the Dorman HVAC blower motor resistor kit?
Each kit includes a blower motor resistor and a harness pigtail, so the resistor and its wiring connector can be replaced together.
Will this blower motor resistor fit my 2003-2010 Toyota Sienna?
It is listed as a direct replacement for the 2003-2010 Toyota Sienna. See the "Vehicles it fits" section for the application details.
What does a blower motor resistor do?
It controls the blower motor's fan speeds, which lets the HVAC fan run at its different speed settings.
What are signs of a failing blower motor resistor?
Common signs include a fan that runs on only some speeds, works only on high, or does not run at all. The blower motor, switch or wiring can cause similar symptoms, so diagnose the cause first.
Why does the kit include a harness pigtail?
An original resistor can overheat or corrode. Dorman considers the harness pigtail essential for most repairs, so the kit supplies a new pigtail along with the resistor.
