Genuine BMW X3 Blower Motor Resistor

BMW X3 Blower Motor Resistor helps make the SUV's climate system controllable by stepping down voltage to allow the fan to spin at a number of speeds for rapid heating or cooling. Inside every BMW is the Blower Motor Resistor, which sits between the controls on the dash and the fan and increases and decreases the resistance, allowing airflow to roar on hot days or slow down after the cabin cools. Early versions of the X3 applied a rather basic ceramic Blower Motor Resistor pack that included separate resistive coils, each corresponding to one of the four or five preset fan levels. Later versions of BMW X3 cars have an integral electronic unit, nicknamed the final stage, with a board of transistors replacing coils, which allows smoother speed changes and longer life. Both designs aim alike; however, the coil styles burn out as a result of heat, while circuit boards fail when electronics or wiring overheat or corrode. If a Blower Motor Resistor dies, the fan may fix on one speed, lose steps, or quit, quickly reminding any BMW passenger of how vital clear glass and comfort are. Full command of the X3 climate controls is restored once the parts are replaced in a hurry, and the proper choice of Blower Motor Resistor for your model year ensures that every twist of that dial is doing its job.

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