Four Seasons 20748 HVAC Blower Motor Resistor

HVAC blower motor control module

This Four Seasons HVAC blower motor resistor, part number 20748, is a direct replacement control module for select Mazda and BMW applications. It is built around a 5-terminal blade-style layout with a square female connector for straightforward electrical matching.

Key features

• HVAC blower motor control module for blower speed regulation
• Square female connector with 5 male blade terminals
• Resistor-style design for select climate control systems
• Four Seasons HVAC Module line for replacement-focused coverage
• Part number 20748 for accurate ordering and lookup

Detailed fitment and application

Fits 2018-2021 Mazda 6, N/A; 2020-2021 Mazda CX-3, N/A; 2018-2019 Mazda CX-3, N/A; 2014-2018 Mazda 3, N/A; 2014-2018 Mazda 3 Sport, N/A; 2015-2017 Mazda 6, N/A; 2016-2017 Mazda CX-3, N/A; and 1991 BMW 318is, N/A. This part cross-references 4P1892 and 984591 for the same application. The Four Seasons 20748 is specified as an HVAC blower motor control module, making it a fitment-based replacement for vehicles that use this connector and terminal configuration.

Common issues this part can address

• Blower motor speeds that stop working or only operate on certain settings
• Intermittent cabin airflow caused by a failing resistor module
• Loss of HVAC fan control from heat-damaged internal resistor circuits
• Electrical connection problems related to worn terminals or connector mismatch

Installation notes and quality assurance

Verify connector shape, terminal count, and vehicle-specific HVAC configuration before installation. Fitment notes include applications with and without automatic temperature control, as well as a Mazda 6 application without rear vents in the center console. Four Seasons states that its products are engineered and tested for years of trouble-free operation, backed by more than 50 years of mobile A/C experience. Part number 20748 should be matched to the vehicle listing before installation.