BMW M3 Blower Motor Resistor Replacement Cost

Know what price you should pay to get your vehicle fixed.

Blower Motor Resistor Replacement
The average cost for a BMW M3 blower motor resistor replacement is between $207 and $245. Labor costs are estimated between $57 and $73 while parts are priced between $150 and $172. Estimate does not include taxes and fees.
Note about price: This service is typically done as part of a bigger, more expensive repair, so the estimate you see above may not represent your total cost. Some of these bigger related repairs are listed in the table below. Talk with a RepairPal Certified shop to learn which repairs may be right for you.
Blower Motor Resistor Replacement

What is a blower motor resistor?

The blower motor is a fan housed in the heating, ventilation and air conditioning (HVAC) ducts, normally located behind the glove box. It uses a resistor to change the speed at which the fan operates.

How does the heater blower motor resistor work?

The air conditioning and heating controls allow you to switch fan speeds — and the blower motor resistor controls that speed once you select it. The resistor is between the power source and the fan, and allows only the desired amount of power to go to the fan. When the fan receives less power, it turns slowly, and when it receives more power, it will speed up. 

What are the symptoms related to a bad heater blower motor resistor?

When the blower motor resistor fails, the air conditioner and heater may still work, but air may blow from the vents at only some of the fan speed settings.

If the resistor isn't replaced for some time after starting to act up, it may fail completely, leaving the entire system useless.

Can I drive with a heater blower motor resistor problem?

Driving with a defective blower motor resistor can be inconvenient, but there's no safety risk. If it has failed completely, you won't be able to use the heat, A/C or even the fan, so that won't be fun during extreme heat or cold.

How often do heater blower motor resistors need to be replaced?

Blower motor resistors aren't a maintenance item — they don't have a set replacement schedule. They can last the life of a vehicle,  and age can be a factor as the plastic can become brittle over time, or heat may cause electronic failure. The amount of use a blower motor receives may also be a factor.

Blower Motor Resistor Replacement Cost Estimates

The average cost for a Blower Motor Resistor Replacement is between $207 and $245 but can vary from car to car.