64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486

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$25.29
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$25.29
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Enter appliance or equipment model number to verify compatibility with this part

64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486

Key Features

  • Regulates the speed of the interior climate control blower fan
  • Direct replacement for the original equipment manufacturer (OEM) part
  • Restores proper heating and air conditioning fan function
  • Designed for vehicles with automatic or digital climate control systems
  • Also known as a Final Stage Unit (FSU) or Final Stage Resistor

Replaces / Cross-Reference Part Numbers

  • 64116923204
  • 64116929486
  • 64118385549
  • 64116920365

Compatibility & Fitment

  • BMW 3 Series (E46): 1999-2006 (323i, 325i, 325xi, 328i, 330i, 330xi, M3)
  • BMW 5 Series (E39): 1997-2003 (525i, 528i, 530i, 540i, M5)
  • BMW X3 (E83): 2004-2010
  • BMW X5 (E53): 2000-2006

When to Replace

  • Blower fan speed changes erratically or randomly
  • Fan only operates on the highest speed setting
  • Blower fan does not work on any speed
  • Fan continues to run after the ignition is turned off

Installation Tips

  • Typically located in the passenger-side footwell, near the blower motor assembly.
  • Disconnect the vehicle's battery before starting the installation process.
  • Ensure the electrical connector is clean and securely attached to the new unit.
  • No special tools are required for most installations.
64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486 3
  • 64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486 1

    Check your OE part

    Please double-check both the number & picture of your OE Resistor and your vehicle model carefully before purchasing!
  • 64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486 2

    Premium Materials

    Made of robust & durable materials that prevent cracking and failing, ensuring excellent degradation resistance for long-lasting performance
  • 64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486 3

    Saving Solution

    Great feeling when your vehicle's AC system works efficiently - Enjoy worthy savings by replacing the superior yet affordable part yourself!
  • 64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486 4

    Fixing AC Symptoms

    Stuck on one speed | Does not work on specific/all settings | Does not blow air | Inconsistent fan speed | No air coming from vents
4 SIMPLE STEPS

4 SIMPLE STEPS

1. Access to your resistor (usually behind/ under the glove box); 2. Release the 2 screws that secure the resistor to the housing; 3. Unplug the wire harness from the resistor connector by carefully releasing its tab with a flat-head screwdriver; 4. Reinstall with the new resistor. You can put some dielectric grease on in the resistor connector housing to avoid water intrusion.

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

If your climate control fan speed is inconsistent, stuck on one speed, only works on the highest setting, or fails to turn on entirely, the blower motor resistor (also known as the Final Stage Unit or FSR) is the most likely culprit. A failing unit can also cause the fan to continue running even after the ignition is turned off, which can lead to a dead battery.
This unit is compatible with a wide range of BMW models featuring automatic climate control, including the E39 (5 Series), E46 (3 Series), E53 (X5), and E83 (X3). It fits various trims such as the 320i, 323i, 325i, 328i, 330i, 525i, 528i, 530i, 540i, M3, and M5.
This resistor serves as a direct replacement for OEM part number 64116923204. It also cross-references with several other factory part numbers, including 64116929486, 64116920365, 64116929540, 64118385549, 64118364173, 64118377579, 64118383835, 64118380580, and 64116931680.
The installation is generally considered a moderate DIY task. You will primarily need a screwdriver (typically a T20 Torx or a flathead depending on your specific trim) to remove the passenger-side footwell trim and the resistor housing. The process usually takes about 30 to 60 minutes. Because the unit is located in a tight space under the dashboard, having a small flashlight and a flexible driver extension can be very helpful.
These units are electronic components that regulate the voltage sent to the blower motor. Over time, the internal circuitry and the 39-pin heatsink can degrade due to constant thermal cycling and exposure to the airflow within the HVAC housing. Once the internal transistors fail, the unit can no longer accurately modulate the fan speed.