Denso 143-3623 Air Filter

Denso FTF Air Filter for Audi A4

The Denso First Time Fit Air Filter is built for drivers who want a direct engine air filter replacement with consistent filtration performance. This Denso air filter, part number 143-3623, is shaped as a rectangular panel measuring 266.0 mm by 213.0 mm with a 67.0 mm height for the specified applications.

Compatible with 2002-2009 Audi A4 and 2002-2009 Audi A4 Quattro, this engine air filter supports clean airflow into the intake system. The Denso FTF Air Filter line is engineered to meet Denso quality standards for fit and performance in OE-style service applications.

Key Features

• Engine air filter for air and fuel delivery service
• Rectangular design for the listed Audi applications
• Dimensions: 266.0 mm side A, 213.0 mm side B, 67.0 mm height
• Direct replacement reference: Denso 143-3623
• Cross-reference part numbers include FRAM CA9409 and Wix 42972

Detailed Description

Denso 143-3623 is a First Time Fit engine air filter designed for 2002-2009 Audi A4 and 2002-2009 Audi A4 Quattro models. As part of the Denso FTF Air Filter line, it reflects Denso’s focus on OE-level filtration components and application-specific fitment. The rectangular filter format and listed dimensions help match the factory airbox requirements for these Audi models.

For Audi A4 air filter replacement and Audi A4 Quattro engine air filter service, this part number 143-3623 provides a straightforward OE-style option. It also cross-references Purolator A45457 and Volkswagen 06C 133 843 for the same application.

What It Helps Address

• Restricted airflow from a dirty or clogged engine air filter
• Routine Audi A4 and Audi A4 Quattro air filter maintenance
• Dust and debris entering the intake system
• Loss of intake efficiency caused by a worn filter element
• Replacement needs for OE-style filter service intervals

Installation Notes and Tips

Verify the airbox shape and dimensions before installation. This filter is listed for 2002-2009 Audi A4 and 2002-2009 Audi A4 Quattro applications, so confirm the vehicle year and engine air filter housing match the catalog listing. Inspect the airbox for dirt or debris before installing the new filter, and seat the filter evenly in the housing to maintain a proper seal.

Quality Assurance

Denso positions the First Time Fit Air Filter line as an OE-focused filtration solution built to meet its internal quality standards. The brand’s background as a global OEM supplier in engine filtration components supports the application-specific design and fit expectations for this part.