Upgrading the cold air intake system on your 2019 Acura ILX is one of the most effective and popular modifications to enhance engine response, increase horsepower, and improve overall driving performance. The cold air intake replaces the factory airbox and intake tubing with a design that allows your engine to draw in cooler, denser air from outside the engine bay. Cooler air contains more oxygen molecules per volume, which improves combustion efficiency and can lead to better throttle response, increased power output, and even improved fuel economy under certain conditions.

Because the 2019 Acura ILX is equipped with a sophisticated engine management system and a turbocharged 2.4-liter four-cylinder engine, improving airflow through a cold air intake can have a particularly beneficial impact. However, successful installation requires attention to detail and the right parts designed specifically for the ILX to ensure compatibility and optimal performance.

Understanding the Benefits of a Cold Air Intake Upgrade

Before diving into the installation process, it’s important to understand the key benefits that a cold air intake system can provide for your Acura ILX:

  • Improved Throttle Response: By delivering a greater volume of cooler air more efficiently, the engine can respond faster when you press the accelerator. This translates into a more immediate and connected driving experience, especially noticeable during acceleration and passing maneuvers.
  • Increased Horsepower and Torque: Cooler air is denser, meaning more oxygen molecules for combustion. This can result in a modest but meaningful increase in horsepower and torque, enhancing your vehicle’s overall performance without extensive engine modifications.
  • Enhanced Engine Sound: Many cold air intake systems provide a more aggressive and sporty intake sound, adding to the auditory enjoyment of driving your ILX.
  • Potential Fuel Efficiency Gains: Under steady cruising conditions, improved airflow and combustion efficiency may lead to better fuel economy. While this varies depending on driving style and conditions, it’s a welcomed benefit for many drivers.
  • Reusable Air Filters: Most aftermarket cold air intake systems come with washable and reusable air filters, reducing long-term maintenance costs compared to disposable factory filters.

How a Cold Air Intake Works

The factory air intake system on the Acura ILX is designed primarily for noise reduction and emissions compliance, which can sometimes restrict airflow. In contrast, a cold air intake system relocates the air filter to a position where it can draw in cooler air from outside the engine compartment, usually through a heat shield or an extended intake tube. This cooler air is denser, meaning it contains more oxygen molecules, which improves the combustion process inside the engine cylinders.

In addition to drawing cooler air, aftermarket cold air intakes typically feature wider, smoother intake tubes that reduce turbulence and air resistance, allowing air to flow more freely into the engine. This combination of cooler, denser air and improved flow dynamics results in enhanced engine performance.

Preparing for Your Cold Air Intake Upgrade

Before beginning the installation of your cold air intake kit, it’s essential to gather the right tools, parts, and information to ensure a smooth upgrade process.

Required Tools and Materials

  • Cold air intake kit specifically designed for the 2019 Acura ILX
  • Basic hand tools: screwdriver (flathead and Phillips), socket wrench set, pliers
  • Protective gloves and safety glasses
  • Clean rag or microfiber cloth
  • Optional: penetrating oil or lubricant for stubborn bolts

Choosing a high-quality cold air intake kit designed for your specific model year is crucial. Kits from reputable manufacturers typically include all necessary components such as the intake tubing, air filter, clamps, brackets, and heat shield or airbox. Some kits also include couplers and sensor connectors to facilitate a straightforward installation process.

Safety Precautions

Always work on a cool engine to avoid burns or injury. Disconnecting the battery before starting helps prevent accidental electrical shorts when handling sensors or electrical connectors. Make sure your vehicle is parked on a flat surface and the parking brake is engaged.

Step-by-Step Guide to Installing a Cold Air Intake on Your 2019 Acura ILX

Follow these detailed steps to perform a successful cold air intake upgrade. Note that slight variations may occur depending on the specific brand and model of your intake kit, so always reference the manufacturer’s instructions as well.

  1. Preparation and Safety Checks

    Park your Acura ILX on a level surface, turn off the ignition, and allow the engine to cool completely. Disconnect the negative terminal of the battery using a socket wrench to prevent electrical mishaps during installation. Wearing gloves and safety glasses is recommended for protection.

  2. Removing the Factory Air Intake System

    Locate the stock air intake system, which consists of the air filter box and the intake tubing connected to the throttle body. Begin by loosening the clamps securing the intake tube using a flathead screwdriver or socket wrench. Carefully disconnect any sensors attached to the intake tubing, such as the Mass Air Flow (MAF) sensor, by gently unplugging the electrical connectors.

    Remove the air filter housing by unscrewing mounting bolts and carefully lifting it out of the engine bay. Take care not to damage any attached vacuum lines or sensor wires. Once all mounting points are free, remove the entire assembly from the engine compartment.

  3. Preparing the New Cold Air Intake Components

    Unpack your cold air intake kit and confirm that all parts are present as per the included checklist. If the kit includes a reusable air filter, ensure it is properly oiled and seated on the intake tube before installation. Some kits require preliminary assembly of the intake components before fitting them into the vehicle—follow the manufacturer’s guidelines carefully.

  4. Installing the New Intake Tubing and Air Filter

    Begin by positioning the new intake tubing in the engine bay, aligning it with the throttle body opening and the air filter mounting location. Attach the intake tubing to the throttle body using the provided couplers and clamps, tightening them securely but without over-torquing.

    Mount the air filter in its designated spot—typically at the end of the intake tube within the heat shield or airbox provided in the kit. Secure the filter with clamps or brackets as instructed. Ensure the air filter is positioned to draw in cool air from outside the engine bay, away from sources of heat.

  5. Reinstalling Sensors and Electrical Connectors

    If your cold air intake kit requires transferring sensors like the MAF sensor from the old intake to the new tubing, carefully do so using the included hardware. Reconnect all electrical connectors securely, ensuring that wiring is not pinched or stretched. Proper sensor installation is critical for accurate engine management and avoiding check engine lights.

  6. Securing and Inspecting the Installation

    Double-check all clamps, bolts, and mounting points to ensure everything is firmly attached and secure. Verify that the intake tubing does not contact any moving parts or hot engine components that could cause damage. Use zip ties or brackets if necessary to tidy up loose wires or hoses.

  7. Final Checks and Reconnecting the Battery

    Reconnect the negative battery terminal and tighten it securely. Start the engine and listen for any unusual noises such as air leaks or rattling. Watch the dashboard for any warning lights. Let the engine idle for a few minutes to stabilize the new intake system.

  8. Test Drive and Performance Verification

    Take your Acura ILX for a test drive under various conditions including city traffic and highway speeds. Pay attention to throttle response, acceleration smoothness, and engine sound. You should notice a more immediate throttle response and a sportier intake note. If you encounter any issues such as hesitation or warning lights, double-check sensor connections and clamp tightness.

Additional Tips for Maximizing Cold Air Intake Performance

  • Regular Maintenance: Clean or replace your reusable air filter according to the manufacturer’s recommendations to maintain optimal airflow and filtration efficiency.
  • Heat Shield Usage: Installing or retaining a heat shield helps prevent the intake from drawing hot air from the engine bay, preserving the benefit of cooler intake air.
  • Consider ECU Tuning: While many cold air intakes offer plug-and-play installation, some drivers opt to have their engine control unit (ECU) retuned to fully capitalize on the increased airflow and optimize fuel delivery.
  • Check Local Emissions Laws: Verify that your cold air intake upgrade complies with local and state emissions regulations to avoid potential legal issues.

Frequently Asked Questions About Cold Air Intake Upgrades on the Acura ILX

Will a cold air intake void my Acura ILX warranty?

Generally, installing an aftermarket cold air intake does not automatically void your vehicle’s warranty. However, if the intake is directly linked to a warranty claim (such as engine damage caused by improper installation), the manufacturer may deny coverage for that specific issue. It’s advisable to consult your dealer and keep installation records.

How much horsepower gain can I expect?

Typical gains from a cold air intake on the 2019 Acura ILX range from 5 to 10 horsepower, depending on the quality of the intake system and supporting modifications. While not dramatic, this gain contributes to a more responsive and enjoyable driving experience.

Many enthusiasts can install a cold air intake themselves with basic mechanical skills and tools. However, if you are uncomfortable working on your engine or handling sensors, professional installation is recommended to ensure proper fitment and to avoid damage.

Can I install a cold air intake on a turbocharged Acura ILX?

Yes, the 2019 Acura ILX’s 2.4-liter engine is turbocharged, and a cold air intake is compatible. It can help improve turbo spool times and overall engine breathing. Just ensure that the intake kit is specifically designed for the turbocharged variant.

Conclusion

Upgrading to a cold air intake on your 2019 Acura ILX is a cost-effective and rewarding modification that can enhance your vehicle’s engine response, increase horsepower, and improve the overall driving experience. By following the detailed installation steps and maintaining your new intake system properly, you can enjoy the benefits of cooler, denser air feeding your engine for years to come. Whether you’re a casual driver seeking better throttle response or a performance enthusiast aiming to maximize your ILX’s potential, a cold air intake upgrade is a smart investment.

For the best results, always choose a well-reviewed cold air intake kit designed specifically for the 2019 Acura ILX, and don’t hesitate to consult with professionals or experienced enthusiasts if you encounter any challenges during installation.