Standard Motor Products RU520 HVAC Blower Motor Resistor 4-Terminal

The Standard Motor Products RU520 is a direct-fit replacement HVAC blower motor resistor featuring a 4-terminal connector. The blower motor resistor regulates the electrical current flowing from the fan speed switch to the blower motor, enabling multiple fan speed settings for your vehicle's heating, ventilation, and air conditioning system.

Manufactured in Standard's IATF 16949-certified North American facility, the RU520 is engineered to match the fit, form, and function of the original equipment part. Standard Motor Products is a trusted name in the automotive aftermarket with over 40,000 products spanning engine management and electrical components.

Key Features:

• 4-terminal connector design for direct OE-style fitment
• Controls blower motor fan speed by regulating electrical current
• Manufactured to meet or exceed OEM specifications
• Produced in an IATF 16949-certified facility for consistent quality
• Restores proper multi-speed HVAC blower motor operation
• Drop-in replacement — no modifications required

A failed blower motor resistor commonly results in the blower fan operating only at a single speed or not at all. Replacing the resistor with a quality part like the RU520 restores full fan speed functionality and proper climate control operation.