The intake air system provides clean air to the engine, optimizes airflow, and reduces unwanted induction noise. The intake air system consists of an air cleaner assembly, resonator assemblies and hoses. The main component of the intake air system is the air cleaner assembly. The air cleaner assembly houses the air cleaner element that removes potential engine contaminants, particularly abrasives. The mass airflow (MAF) sensor is attached externally to the air cleaner assembly and measures the quantity of air delivered to the engine. The MAF sensor can be replaced as an individual component. The intake air system also contains a intake air temperature (IAT) sensor, which is integrated with the MAF sensor. For additional information, refer to ENGINE CONTROL COMPONENTS . The intake air resonator is a part of the intake air housing. The function of a resonator is to reduce intake air noise. The intake air system components are connected to each other and to the electronic throttle body assembly with hoses.

The overall quantity of air metered to the engine is controlled by the torque based electronic throttle control (ETC) system.

For additional information, refer to ELECTRONIC THROTTLE CONTROL (ETC) SYSTEM .

For illustrations of intake air system components, refer to the Intake Air Distribution and Filtering article.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Intake Air System: Overview

Use the Manual With the Right Hardware

When to See a Mechanic