Take back control of your fan speeds with the Standard Ignition HVAC Blower Motor Resistor (RU-818), designed specifically for BMW applications. This resistor sets the voltage to the blower motor so you can select variable A/C and heater fan speeds, and it drops in for a long list of BMW cars including the 2014-2016 228I, 2012-2018 320I, 2012-2016 328I, 2016-2018 330E, 2015-2018 M3 and 2015-2020 M4 — see the Buyer's Guide tab for the full list of 58 applications.
- Premium copper connectors: deliver more precise resistance values for improved performance and longer part life.
- Kanthal D resistor wire: adds flexibility, durability and tensile strength to the wiring on higher-watt resistors.
- Restores variable speed control: helps return proper A/C and heater blower motor speed control to support HVAC performance and passenger comfort.
- BMW-specific engineering: researched and designed for seamless integration with the vehicle's HVAC system.
Every unit undergoes extensive testing to confirm correct performance. If a failed resistor is the cause of missing or stuck blower speeds, this replaces it.
Interchange: 64119231742 · 64119270254 · 64119276112 · RU1507 · JA1967 · BR718
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this blower motor resistor do?
It sets the voltage sent to the blower motor so you can select the different A/C and heater fan speeds in your BMW's HVAC system.
Which vehicles does the RU-818 fit?
It fits many BMW models, including the 2014-2016 228I, 2012-2018 320I, 2012-2016 328I, 2015-2018 M3 and 2015-2020 M4. See the Buyer's Guide tab for all 58 applications.
What are signs this resistor may need replacing?
Common signs include losing one or more blower fan speeds, the fan only working on high, or no blower operation. Diagnose the cause before replacing.
Is this a direct-fit replacement?
Yes, it is a direct-fit replacement designed specifically for the listed BMW applications and engineered to integrate with the vehicle's HVAC system.
What numbers does this part interchange with?
It interchanges with 64119231742, 64119270254, 64119276112, RU1507, JA1967 and BR718.
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