Denso 143-3746 Engine Air Filter

Denso FTF Air Filter for Land Rover

The Denso FTF Air Filter, part number 143-3746, is an engine air filter built to match the dimensions and fitment requirements of select Land Rover applications. With a rectangular shape and precise sizing, it supports proper air intake sealing for Discovery, Range Rover, Range Rover Sport, and LR4 models.

Key Features

• Engine air filter from Denso’s First Time Fit line
• Rectangular design with 345.0 mm side A length and 162.0 mm side B length
• 50.0 mm height for OE-style fitment
• Built for select Land Rover Discovery, Range Rover, Range Rover Sport, and LR4 applications
• Part number 143-3746 for easy identification

First Time Fit Product Line

Denso’s FTF Air Filter line is engineered to meet the brand’s quality standards for filtration components. As an OE-focused manufacturer, Denso applies the same attention to fit and performance across its First Time Fit air filters, helping ensure the filter matches the vehicle’s intake housing requirements.

Detailed Description

This Denso engine air filter is designed for direct replacement use in select Land Rover vehicles, including the Discovery, Range Rover, Range Rover Sport, and LR4. The rectangular profile and listed dimensions help support a secure fit in the air box, which is important for maintaining consistent airflow through the engine intake system. If you are replacing a worn Land Rover Discovery air filter or servicing a Range Rover air filter application, 143-3746 provides a straightforward OE-style option.

This part cross-references FRAM CA11062 and Wix 49593 for the same application.

What It Helps Address

• Restricted airflow caused by a dirty or clogged engine air filter
• Dust and debris buildup in the intake system
• Fitment issues from an incorrect Land Rover air filter size
• Reduced filtration performance from a worn replacement filter
• Routine maintenance needs for Discovery, Range Rover, Range Rover Sport, and LR4 models

Installation Notes and Tips

• Verify the air filter housing dimensions before installation.
• Confirm your vehicle year and model against the fitment list for the correct application.
• Inspect the air box and sealing surfaces before installing the new filter.
• Replace the filter at regular service intervals based on driving conditions and maintenance schedule.

Quality Assurance

Denso states that quality assurance is built into its First Time Fit air filters. The brand’s background as a global OEM supplier in engine filtration components supports consistent manufacturing standards for this part.