Brushless Motors

A New Technology

Brushless Direct Current (BLDC) motors are quickly on the rise in the automotive aftermarket. This sophisticated technology first appeared in the mid 1990's and has gained popularity with the O.E. due to higher speed ranges, longer operating life and higher efficiency, just to name a few.

Additional Benefits

  • More speed control with less power demand
  • Quick response to control changes
  • Increased service life
  • Quiet operation
  • Larger operating speed range
Brushless Motor Evo.jpg

Brushless motors are true to their name and utilize electronic sensored or sensorless commutation instead of a brush card. These cards degrade over time causing motor failure. 

Brushless motors fulfill a greater range of applications than brushed motors and are more efficient by design. This efficient design has characteristics such as quieter operation, greater speed control and less weight than the brushed design.

In between the evolution of the brushed design and brushless technology, the PWM controlled motor was developed. PWM (Pulse Width Modulation) is a digital signal generated from the vehicle’s ECM (Engine Control Module) capable of controlling and varying the speed of the electric motor. Brushed motors in conjunction with an attached PWM control
module can be used in some brushless applications, however, a brushed motor cannot be used as a direct replacement in brushless applications. Attempting to do so can result in poor performance, damaged components, or thermal events due to the differences in the electronics controlling the motor and HVAC system. 


Our Brushless Replacement Design

P/N 75850

Four Seasons redesigned motor resolves several issues associated with this O.E. unit for these applications. Issues include insufficient cooling, exposed circuit boards and loosely attached electronics that can fail from common vehicle vibration. Our design features airtight sealed electronics with stall and surge protection, EMI suppression and an integrated cooling tube for extended motor life. 

Infiniti (12-05) Applications 

Nissan (12-03) Applications 


Cadillac / GMC Brushless Motor

P/N 35121

This Four Seasons motor is our improvement over GM’s high failure HVAC brushless motor. Our design is engineered with the reliability of a conventional brush type motor and features new electronics, a more heat resistant housing and a shorter wheel for easy installation.

Applications Include: 

Cadillac Deville (99-94)
Cadillac Eldorado (02-94)
Cadillac Seville (97-94)
Chevrolet S10 (99-97)
GMC Sonoma (99-97)