Dorman 973-586 HVAC Blower Motor Resistor Kit

Dorman 973-586 HVAC Blower Motor Resistor Kit

This Dorman HVAC blower motor resistor kit restores blower speed control on select Mercedes-Benz models when the original resistor has overheated or the connector has corroded. It includes the resistor and harness pigtail needed for a direct electrical repair on the HVAC blower circuit.

• HVAC blower motor resistor kit for blower speed control repair
• Includes a replacement resistor and wiring harness pigtail
• Blade-style terminals with male connector and terminal ends
• 6-wire harness with 2 connectors and 2 mounting holes
• Gasket or seal included for the repair interface
• 30 cm wiring harness length for connector replacement work

Application Details

Compatible with Mercedes-Benz E300, E320, E350, E550, E63 AMG, E280, E500, E55 AMG, ML350, ML500, ML320, and ML55 AMG applications across the listed model years. This Dorman 973-586 resistor kit is a practical replacement when the HVAC blower motor only works on certain speeds, stops responding, or shows signs of heat damage at the connector.

This part cross-references Standard Ignition RU-566 for the same application.

What It Helps Fix

• Blower motor stuck on one speed
• Intermittent HVAC fan operation
• No airflow from the cabin vents due to resistor failure
• Heat-damaged or corroded blower resistor connector
• Electrical resistance issues in the HVAC blower circuit

Installation Notes

Inspect the blower resistor connector and surrounding wiring before installation. Replace any heat-damaged terminals or brittle insulation, and confirm the harness pigtail routing matches the original layout. Verify connector fitment and secure the assembly to the original mounting points.

Quality Assurance

Dorman supplies this HVAC blower motor resistor kit as an OE-style electrical repair solution for select Mercedes-Benz E-Class and M-Class vehicles. The included harness pigtail and gasket support a cleaner repair when the original resistor or connector has failed from heat or corrosion.