If your blower fan has lost some of its speeds, the Standard Ignition RU-671 Z3 blower motor resistor is designed to bring back variable fan-speed control for your A/C and heater. It is a direct-fit replacement for the 1996-2001 BMW Z3 and the 2000-2003 BMW Z8. See the "Vehicles it fits" section for engine-specific details.
The blower motor resistor regulates the voltage sent to the blower motor, which lets the fan run at the different speeds you select on the climate controls.
Signs this hvac blower motor resistor may need replacing include a blower that runs on only some speed settings, a fan that won't change speed, or no blower operation at all. These symptoms can have other causes, so diagnose the HVAC blower circuit before replacing parts. If a failed resistor is the cause, the RU-671 is designed to restore the blower motor's variable speed control and support normal HVAC performance and passenger comfort.
What does a blower motor resistor do?
It regulates the voltage supplied to the blower motor. That lets the fan run at the different speeds selected on the climate controls.
Which vehicles does the RU-671 fit?
It is listed for the 1996-2001 BMW Z3 and the 2000-2003 BMW Z8. See the "Vehicles it fits" section for engine-specific fitment details.
What are signs my blower motor resistor may be failing?
Common signs are a blower that works only on some speeds, won't change speed, or doesn't run at all. These can have other causes, so diagnose the circuit before replacing parts.
What materials are used in the RU-671?
It uses Kanthal D resistor wire for flexibility, durability and tensile strength in the higher-watt resistor wiring. It also uses premium copper electrical connectors.
Is the RU-671 tested?
Yes. It goes through extensive testing at Standard Ignition's facility to check for correct performance in all conditions.
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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.
