Denso 143-3721 Engine Air Filter

Denso FTF Air Filter for Fiat 500

The Denso FTF Air Filter 143-3721 is an engine air filter built for direct-fit service on select Fiat 500 models. It uses a rectangular filter shape with a 379.0 mm side A length, 131.0 mm side B length, and 42.0 mm height to match the specified airbox dimensions for 2012-2015 Fiat 500 applications.

Key Features

• Engine air filter for air and fuel delivery service
• Rectangular filter design for the listed Fiat 500 fitment
• Dimensions: 379.0 mm x 131.0 mm x 42.0 mm
• Built under Denso First Time Fit Air Filter standards
• Part number 143-3721 for catalog and service lookup

Product Details

Denso’s First Time Fit Air Filter line is engineered to meet the brand’s quality standards for filtration performance and fit. As a global OEM leader in engine filtration components, Denso applies OE-focused manufacturing practices to this engine air filter, helping ensure the correct form factor for the air intake system on the Fiat 500. This part number 143-3721 is also cross-referenced to FRAM CA11109 for the same application.

Compatible With 2012-2015 Fiat 500, N/A. The fitment data identifies this air filter for the listed model years and position, making it a direct-reference replacement for routine intake service on the Fiat 500.

What It Helps Address

• Restricted airflow caused by a dirty or loaded engine air filter
• Dust and debris entering the intake tract
• Reduced engine breathing from a worn filter element
• Service replacement needs during scheduled maintenance
• Fitment issues from using the wrong filter dimensions

Installation Notes and Tips

Verify the airbox dimensions and compare the old filter to the new Denso 143-3721 before installation. Confirm the rectangular shape and listed measurements match the vehicle’s filter housing, then seat the filter evenly in the air cleaner assembly to maintain a proper seal. For Fiat 500 service, inspect the airbox for debris before closing the housing.

Quality Assurance

Denso positions the First Time Fit Air Filter line around consistent manufacturing control and OE-level fit standards. The brand states that quality assurance is provided for this product line, giving buyers a service part backed by Denso’s filtration component experience.