Skip to content
CORTECO-MICRONAIR Cabin Air Filter - 21652713

CORTECO-MICRONAIR Cabin Air Filter - 21652713

MICRONAIR
Availability:
5+ in stock, ready to be shipped

Ships same or next business day

SKU 21652713-CORTECO
$21.30 - $21.30
$21.30
$21.30 - $21.30
$21.30
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

Rewards
EARN REWARD POINTS
Purchasing this product will earn you 105 points to redeem on future purchases. Check your points.

CORTECO-MICRONAIR

Cabin Air Filter

This product also goes by these part numbers: 4B0 819 439 C, 4B0819439C, 21652713

This part also goes by the following cross reference.

Cross Reference Part Number: 4B0819439C

Fits These Vehicles 18 applications
Audi
Make Model Engine Years
Audi A4 1.8L L4 2002–2005
Audi A4 3.0L V6 2002–2005
Audi A4 2.0L L4 2005–2005
Audi A4 2006–2009
Audi A4 Quattro 1.8L L4 2002–2005
Audi A4 Quattro 3.0L V6 2002–2005
Audi A4 Quattro 2005–2009
Audi A4 Quattro 2.0L L4 2005–2005
Audi A4 Quattro 3.2L V6 2005–2005
Audi A6 1999–2004
Audi A6 Quattro 1999–2004
Audi Allroad Quattro 2001–2002
Audi Allroad Quattro 2004–2005
Audi Allroad Quattro 2.7L V6 2003–2003
Audi RS4 2007–2008
Audi RS6 2003–2003
Audi S4 2004–2009
Audi S6 2002–2003

Fitment data last updated: 2026-07-18

Fits 18 vehicle applications Check vehicle fitment before ordering View fitment

About this Cabin Air Filter

The MICRONAIR 21652713-CORTECO cabin air filter cleans the air coming into the car through the heating and A/C system, trapping dust, pollen and, in activated-charcoal versions, odors. A clogged filter reduces airflow and can cause musty smells.

Frequently asked questions

How often should I replace the cabin air filter?

Follow your car's maintenance schedule, and replace it more often if you drive in dusty or high-pollen areas or notice reduced airflow or odors.

What are the signs of a dirty cabin air filter?

Weak airflow from the vents even on high fan speed, windows that are slow to demist, a musty smell when the fan runs, or a filter that looks dark and clogged.

What is the difference between standard and charcoal filters?

Standard filters trap particles such as dust and pollen. Activated-charcoal filters also absorb odors and some exhaust fumes, which helps in heavy traffic.

Can I replace the cabin air filter myself?

On most cars, yes. It is usually behind the glovebox, under the cowl at the base of the windshield, or under the dashboard. Note the airflow arrow on the filter and fit it the right way round.

How do I make sure this cabin air filter fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

Euromotiv is an independent retailer of OEM, Genuine, and aftermarket automotive parts. We are not affiliated with, endorsed by, or authorized by Audi AG, Volkswagen AG, BMW AG, Mercedes-Benz Group AG, Dr. Ing. h.c. F. Porsche AG, MINI, or any other vehicle manufacturer. All trademarks, logos, and brand names are the property of their respective owners and are used solely for identification and compatibility purposes.