Automotive Parts [Lifetime Warranty] 64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486
Blower motor resistor with metal cooling fins for automotive HVAC systems.
Blower motor resistor 64116923204 shown with AC troubleshooting guide and truck background.
Blower motor resistor replacement for BMW with silver cooling fins and black plastic housing.
Blower motor resistor 64116923204 shown with car dashboard background to illustrate climate control function.
Blower motor resistor 64116923204 featuring heat-resistant aluminum cooling fins and a 5-pin electrical connector.
Hands holding AC manifold gauges to demonstrate 20-minute installation for BlueStars Blower Motor Resistor.
BlueStars promotional image featuring a family in a car to represent car air conditioning and blower motor repair.
Blower motor resistor with metal cooling fins for automotive HVAC systems.
Blower motor resistor 64116923204 shown with AC troubleshooting guide and truck background.
Blower motor resistor replacement for BMW with silver cooling fins and black plastic housing.
Blower motor resistor 64116923204 shown with car dashboard background to illustrate climate control function.
Blower motor resistor 64116923204 featuring heat-resistant aluminum cooling fins and a 5-pin electrical connector.
Hands holding AC manifold gauges to demonstrate 20-minute installation for BlueStars Blower Motor Resistor.
BlueStars promotional image featuring a family in a car to represent car air conditioning and blower motor repair.
Lifetime Warranty

[Lifetime Warranty] 64116923204 Blower Motor Resistor - Replaces 64116923204 64116929486

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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.
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  • Check your OE part

    Check your OE part

    Please double-check both the number & picture of your OE Resistor and your vehicle model carefully before purchasing!
  • Premium Materials

    Premium Materials

    Made of robust & durable materials that prevent cracking and failing, ensuring excellent degradation resistance for long-lasting performance
  • Saving Solution

    Saving Solution

    Great feeling when your vehicle's AC system works efficiently - Enjoy worthy savings by replacing the superior yet affordable part yourself!
  • Fixing AC Symptoms

    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.
Brand Model Number
BMW 3 Series: 1999 2000 323i / 328i 2001 2002 2003 325i / 325xi / 330i / 330xi 2001 2002 2003 2004 2005 325Ci / 330Ci 2000 2001 2002 2003 2004 2005 2006 M3
BMW 5 Series: 1997 1998 1999 2000 528i 1997 1998 1999 2000 2001 2002 2003 540i 2001 2002 2003 525i / 530i 2000 2001 2002 2003 M5
BMW X Series: 2000 2001 2002 2003 2004 2005 2006 X5 2004 X3

FAQ

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.