Audi A4 B9 / A5 / A6 C8 / Q7 12V HVAC Blower Motor Fan 4M1820021

Product overview

This 12 V electric blower motor and fan is a replacement for OE-reference number 4M1820021. It is listed for a broad range of later Audi models and some related group vehicles. The blower pushes air across the evaporator and heater core and through the cabin vents, so if you notice weak airflow, a rattle or squeal behind the glovebox, or a fan that only works on some speeds, a new blower is a common fix.

Vehicle compatibility

The listing has provided 200 fitment rows. Examples include Audi A4 B9 and B9 Avant, A5 and A5 Sportback, A6 C8 and Avant, A7 Sportback, Q5, Q7, Q8 and e-tron, along with some A4 B8 and A5 entries from 2008 and several Porsche Cayenne and 911 (992) entries. The listing title also mentions VW Touareg. Because such a wide spread of platforms appears, please verify carefully before ordering.

Key features

• 12 V electric blower motor with fan
• Restores consistent airflow for heating, cooling and demisting
• Matched to OE-reference number 4M1820021
• New condition replacement part

Technical specifications

Installation requirements

We recommend installation by a qualified technician. Disconnect the battery, remove the lower dash or glovebox trim to access the blower housing, and keep the original fixings. Inspect the cabin filter and the blower control electronics while access is available, then test all fan speeds and air distribution settings after fitting. Any stored climate control fault codes should be cleared with a suitable scan tool once the job is complete, and the fan should run quietly without vibration.

Fitment checks before ordering

Audi has used several blower variants across these models, and some listed applications may not share this part. Confirm the OE number on your existing blower or check your VIN with our team before purchasing.

Package inclusions

1 x blower motor fan assembly. Contents as pictured/listed; housing, control module and mounting hardware are not included unless stated.

Shipping information

Shipped from China to customers in Australia and New Zealand. Freight is calculated at checkout based on your delivery address, and actual freight is confirmed at the time of order.

Special Order Item

This product is a special-order item sourced specifically for your vehicle. Please allow an estimated lead time of 3-4 weeks for sourcing and delivery. Lead times are estimates and may vary depending on supplier availability, order processing, and international shipping. We recommend confirming availability before placing your order.