Original BMW HVAC Blower Motor Regulator Final Stage Unit for BMW Z4 (2003–2008)

This Original BMW final stage unit is the HVAC blower motor regulator for the BMW Z4 (2003–2008), the electronic module that sets how fast the cabin blower fan runs. BMW identifies part number 64-11-5-A3F-3B9 as an HVAC blower motor regulator. On any climate system, a final stage unit takes the fan speed request from the heater and air conditioning controls and varies the power sent to the blower motor, so the fan steps up and down as you change settings.

Original BMW Parts carry a 24-month parts warranty.

BMW's parts data ties this regulator to a second part number, 64-11-6-927-600. Treat that number as a cross-reference: if the regulator on your Z4 carries either number, this is the matching Original BMW unit. Check the fitment table below to confirm this regulator matches your Z4.

Technical Details

• Manufacturer: BMW (Original BMW Parts)
• Part number: 64-11-5-A3F-3B9
• Part name: HVAC blower motor regulator, also called the final stage unit
• Related BMW part number: 64-11-6-927-600
• System: heating, ventilation, and air conditioning blower control
• Warranty: 24 months

Common Questions

What does the final stage unit control?
It controls blower motor speed, turning the fan setting on your climate controls into the power level the blower actually runs at.

Is this the same part as 64-11-6-927-600?
BMW's parts data links the two numbers to this regulator, and a VIN check will confirm which one your Z4 calls for.

Fitment & Compatibility

Use the table below to verify the year and submodel for your build. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.