Denso 143-3789 Engine Air Filter

Denso FTF Air Filter for Mazda Applications

The Denso First Time Fit Air Filter is an engine air filter built to meet Denso quality standards for dependable filtration and consistent airflow. This Denso 143-3789 is a direct-fit replacement for select Mazda models, including Mazda CX-5, Mazda CX-9, and Mazda 6 applications.

Key Features

• Engine air filter for select Mazda vehicles
• First Time Fit product line focused on OE-style fit and performance
• Built to Denso quality standards for filtration consistency
• Direct replacement for part number 143-3789
• Cross-references Purolator A31399 and Wix WA9790 for the same application

Detailed Description

Denso’s FTF Air Filter line is engineered as a straightforward replacement for the factory engine air filter, helping maintain clean intake airflow in everyday driving conditions. This part number 143-3789 is listed for 2021-2024 Mazda CX-5, 2021-2023 Mazda CX-9, 2021 Mazda 6, 2018-2020 Mazda 6, 2019-2020 Mazda CX-5, and 2016-2020 Mazda CX-9. If you are searching for a Mazda CX-5 engine air filter or a Mazda CX-9 air filter replacement, this Denso filter matches the confirmed applications shown here.

What It Helps Address

• Restricted airflow caused by a dirty engine air filter
• Dust and debris entering the intake system
• Reduced filtration performance from a worn filter element
• Routine maintenance needs on Mazda CX-5, CX-9, and Mazda 6 models

Installation Notes and Tips

Verify the vehicle year, make, and model before ordering. Replace the engine air filter during scheduled maintenance or sooner if the existing filter is visibly dirty. Confirm the air box is clean before installing the new filter, and make sure the filter seats properly in the housing to maintain a secure seal.

Quality Assurance

Denso develops filtration components as a global OEM supplier, and the First Time Fit line is built to Denso’s stated quality standards for consistent fit and performance. Quality assurance is stated by the manufacturer for this product line.