Denso 143-3818 Engine Air Filter

Denso FTF Air Filter for Ram 1500

The Denso First Time Fit Air Filter is built for direct replacement service on select Ram trucks. Engineered to meet Denso quality standards, this engine air filter helps maintain clean airflow for dependable engine operation in daily driving and work use.

Key Features

• Engine air filter for select Ram 1500 and Ram 1500 Classic applications
• Part number 143-3818 for accurate ordering and catalog matching
• First Time Fit product line focused on OE-style replacement fit and function
• Built to Denso quality standards for filtration performance
• Cross-references FRAM CA9401 and Wix 42725 for the same application

Product Details

Denso 143-3818 is an engine air filter from the FTF Air Filter line, developed for drivers who want a direct-fit replacement for factory-style service intervals. It is listed for 2021-2024 Ram 1500, 2021-2023 Ram 1500 Classic, and 2019-2020 Ram 1500 applications. If you are searching for a Ram 1500 engine air filter or a Ram 1500 Classic air filter by part number, 143-3818 is the reference to use.

The First Time Fit line is Denso’s OE-focused replacement program, aimed at consistent fitment and filtration performance across supported vehicles. This filter is intended for routine engine air intake service where maintaining clean incoming air is important for drivability and engine protection.

Common Issues This Part Helps Address

• Restricted airflow from a dirty or clogged engine air filter
• Dust and debris entering the intake system through a worn filter
• Reduced engine responsiveness caused by neglected filtration service
• Maintenance replacement needs on Ram 1500 and Ram 1500 Classic models
• Incorrect filter selection when matching by OE or cross-reference number

Installation Notes and Tips

Verify the vehicle year, model, and engine air filter application before ordering. Confirm fitment against the existing filter housing and compare the part number 143-3818 with the removed filter or catalog reference. Install according to the vehicle service procedure and inspect the air box sealing surfaces before closing the housing.

Quality Assurance

Denso states that First Time Fit Air Filters are engineered to meet its quality standards, with quality assurance provided for the product line. Denso’s background as a global OEM supplier in engine filtration supports the design approach behind this replacement filter.