4B0820521 A/C Blower Motor Resistor Control For Audi 98-05 Allroad A6 Quattro

A/C Blower Motor Resistor Control for Audi

This A/C blower motor resistor control regulates fan speed inside the cabin and cross-references OEM part number 4B0820521.

Overview

This blower motor resistor control restores variable fan speeds in the cabin climate system. The resistor control module manages current to the blower motor so each setting delivers the airflow you select. It suits owners maintaining an aging Audi A6, Allroad, or A6 Quattro climate system.

Built For Performance

• Direct-fit replacement for the original resistor control module
• Restores all fan speed settings, from low to high
• Housing matches the factory mounting points
• Plug-in electrical connector for straightforward installation
• Cross-references OEM part number 4B0820521

Fits These Machines

• for Audi A6 Quattro 1998-2005
• for Audi A6 1998-2005
• for Audi Allroad 1998-2005

On-The-Job Use

• Replacing a failed resistor that leaves only one fan speed working
• Restoring cabin heating and cooling airflow
• Routine climate system repair on higher-mileage vehicles

Specs At A Glance

Good To Know

Q: What are the signs of a failed blower motor resistor? A: A common sign is a blower that only works on the highest speed or not at all. Replacing the resistor control restores normal fan speed operation.

Q: Does this resistor control fit both sedan and wagon A6 models? A: It is listed for the A6, A6 Quattro, and Allroad across the 1998-2005 range. Confirm compatibility with your serial number before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.