Wix 42972 Air Filter

WIX 42972 Engine Air Filter Overview

The WIX 42972 engine air filter is a panel-style replacement built for everyday driving and demanding conditions alike. It is a direct-fit air filter for select Audi A4 and Audi A4 Quattro applications, including models with OEM part number 06C 133 843.

With enhanced cellulose media and a polyurethane seal, this filter is built to maintain airflow while helping protect the engine from airborne contaminants in stop-and-go traffic, dirt roads, construction zones, short trips, and highway use.

Key Features

• Panel-style engine air filter for select Audi A4 and Audi A4 Quattro applications
• WIX part number 42972
• Enhanced cellulose media with phenolic resin treatment for added moisture resistance
• 30% more media than OES filters, based on manufacturer design data
• High-tear strength polyurethane seal for hot and cold temperature exposure
• Laboratory-tested to ISO 5011 standards with at least 99.5% efficiency, based on Wix 42389

Detailed Description

WIX 42972 is an engine air filter designed to support clean intake airflow in light-duty passenger vehicles. Its 10.500-inch length, 8.400-inch width, and 2.765-inch height match the panel filter format used in compatible Audi applications. This filter is a practical OE-style replacement for drivers looking for a service part that aligns with normal OEM air filter change intervals.

Fits 2001-2007 Audi A4, N/A. Fits 2001-2007 Audi A4 Quattro, N/A. Fits 2009 Audi A4, N/A. Fits 2009 Audi A4 Quattro, N/A. Fits 2005-2008 Audi A4, N/A. Fits 2005-2008 Audi A4 Quattro, N/A. This part cross-references FRAM CA9409 and NAPA Gold Filters 2972 for the same application.

What It Helps Address

• Restricted airflow caused by a dirty or clogged engine air filter
• Dust and debris entering the intake system during daily driving
• Reduced filtration performance in stop-and-go or short-trip use
• Moisture exposure that can affect standard filter media
• Service replacement needs for Audi A4 and Audi A4 Quattro intake systems

Installation Notes and Tips

Replace the filter at the interval specified by the vehicle manufacturer or sooner if driving conditions are severe. Before installation, confirm the filter dimensions and housing shape match the existing air box. For Audi A4 and Audi A4 Quattro fitments, verify the original equipment part number 06C 133 843 when cross-checking applications.

Quality Assurance

WIX states that this filter is engineered for dependable engine protection and tested to ISO 5011 filtration standards. The media construction and seal materials are selected to support durability in changing temperatures and moisture exposure.