Help get your heater and A/C fan working at every speed setting again with the Standard Blower Motor Resistor RU-504, a Mazda 3 blower motor resistor for the 2004 model year that is also a direct-fit replacement for the 2006-2010 and 2012-2015 Mazda 5. This front HVAC blower motor resistor is designed to restore variable fan-speed control on the listed applications.
A blower motor resistor lowers the current reaching the blower motor, which lets the heater and A/C fan run at its lower speed settings.
Signs this part may need replacing include a blower that runs on only some speeds, runs only on its highest setting, or does not run at all. A switch, connector or wiring fault can cause the same symptoms, so diagnose the cause before replacing the resistor. See the Buyer's Guide tab for full fitment details.
Interchange: RU1197 · JA1671 · BR407 · BP4K61B15
This part cross-references / interchanges with the following part numbers:
What does a blower motor resistor do?
It lowers the current reaching the blower motor so the heater and A/C fan can run at lower speed settings. The RU-504 is designed to restore that variable speed control on the listed applications.
Is this the right Mazda 5 blower motor resistor for my car?
The RU-504 is listed for the 2006-2010 and 2012-2015 Mazda 5, and for the 2004 Mazda 3. Check the Buyer's Guide tab to confirm your exact vehicle.
What signs suggest the blower motor resistor may need replacing?
A failed resistor may cause a blower that works on only some speeds, only on high, or not at all. Switch or wiring faults cause similar symptoms, so diagnose the cause first.
What sets this Standard resistor apart?
It uses premium copper electrical connectors intended for more precise resistance values and a longer part life. It also undergoes extensive testing at the manufacturer's facility.
How is the RU-504 installed?
It is a direct-fit replacement for the front blower motor resistor on the listed applications. Follow your vehicle's service information for access, connector handling and installation steps.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
