Reasons to change your air filter
It is important to change the cabin air filter of your 2018 Subaru WRX STI for several reasons:
- Protecting the engine: A dirty or clogged air filter can restrict the airflow to the engine, which can damage the engine over time.
- Enhancing the air quality inside the car: The cabin air filter helps to remove pollutants, dust, and other allergens from the air inside the car, which improves the air quality for the passengers.
- Prolonging the life of the HVAC system: The cabin air filter also helps to keep the heating and air conditioning system running smoothly, which helps prolong the life of the system.
- Improving the air quality outside the car: A clean air filter can also help improve the air quality outside the car by reducing the emissions of pollutants.
- Improved engine performance: A clean air filter allows for a greater amount of air to reach the engine, which enhances overall performance and fuel efficiency.
By changing the air filter on a regular basis, you can ensure that your Subaru WRX STI engine and HVAC system are running efficiently, and that the air inside and outside the car is clean and healthy.
The correct cabin air filter on a 2018 Subaru WRX STI
For any 2018 Subaru WRX STI, you can use ACDELCO CF3304 cabin air filters. These will be an exact fit and will match the required specifications of your WRX STI. We always try to recommend the highest quality air filters for your money, and these air filters are either a factory recommendation or an equivalent replacement available in today’s market at a reasonable price.
How often should I change my cabin air filter?
In general, it is advised that you replace the cabin air filter once per year, or every 12,500 miles, whichever comes first. If you drive in a heavily polluted area, or in an area with high levels of dust, pollen, or other allergens, it may be necessary to change the filter more frequently. Similarly, if you frequently drive on dirt or gravel roads, or if you use your 2018 Subaru WRX STI for off-roading, change your air filter more often.
It’s also important to pay attention to these indicators that the filter needs to be changed, including:
- Reduced airflow from the vents
- Unusual smells coming from the vents
- Increased dust and debris in your car
Changing the cabin air filter on a 2018 Subaru WRX STI
This is a process you can do on your own with some commonplace tools. Of course, consult your owner’s manual, as well as a factory service manual (FSM). The video shown below does a good job of demonstrating the process.
Tips for changing the cabin air filter on your 2018 Subaru WRX STI
Ensure you reference the video above before you attempt to replace the air filter on your 2018 Subaru WRX STI, as well as review your factory service manual. Be sure to check the tips shown here to help you as you complete this repair.
- Follow manufacturer’s recommendations: Follow any specific instructions provided by the manufacturer, such as replacing any clips or fasteners, to ensure the proper fit of the new filter.
- Orient the filter correctly: Make sure the new filter is installed securely, with the arrows on the filter pointing in the direction of the airflow. Improper installation may result in reduced filter performance and potentially damage to your car’s ventilation system.
- Clean the area around the filter: Before installing the new filter, use a vacuum cleaner or compressed air to clean the area around the filter. This will help prevent debris from getting inside the new filter.
Helpful Tools
You should be able to accomplish a cabin air filter change with some ordinary tools you probably already have. However, there are a few tools that are specific to this job that you may not have, and we also want to recommend some general tools that you should for sure have in your toolbox if you don’t already.
- A can of Compressed Air – use this to clean the area around the filter. This will help ensure that the new filter operates at maximum efficiency.
- A Mask – If you have allergies or sensitivities to dust or other allergens, you should wear a mask to protect yourself when removing and replacing the cabin air filter.
- A Vacuum Cleaner / Shop Vac – You can use a handheld vacuum cleaner or shop vac instead of compressed air, but it won’t displace the the debris quite as effectively.
- Screwdriver – In some cases, you will need a screwdriver to remove the cover that houses the cabin air filter.
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