Mitsubishi ASX air filter replacement guide
Replacing the air filter in your Mitsubishi ASX is a straightforward yet essential maintenance task that ensures optimal engine performance and fuel efficiency. Over time, a clogged or dirty air filter restricts airflow, diminishing power output and potentially harming engine components. This guide provides a clear, step-by-step approach for ASX owners to locate, inspect, and swap out the old filter for a new one. With basic tools and minimal time, you can restore clean air intake, improve throttle response, and extend your vehicle's longevity—all without professional assistance.
Essential Guide to Replacing Your Mitsubishi ASX Air Filter
A clean air filter is crucial for maintaining your Mitsubishi ASX's engine performance and fuel efficiency. The engine air filter prevents dirt, dust, and debris from entering the combustion chamber, ensuring optimal airflow. Over time, this filter becomes clogged, reducing engine power and potentially increasing fuel consumption. For most Mitsubishi ASX models, it is recommended to inspect the filter every 12,000 to 15,000 miles and replace it every 30,000 miles, although driving in dusty conditions may require more frequent changes. This guide provides a step-by-step approach to locating and swapping out the air filter yourself, a simple task that can save you money on service costs.
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Locating the Air Filter Housing on Your Mitsubishi ASX
The first step in replacing the air filter is to locate the air filter housing. On the Mitsubishi ASX, the housing is typically a large black plastic box situated on the driver's side of the engine bay. It is connected to the engine's intake manifold by a large rubber tube. To access it, you must first ensure the engine is cool and the vehicle is parked on a level surface. Open the hood and look for the housing; it is usually secured with metal clips or Phillips-head screws around its perimeter. There is no need to disconnect any hoses, as the housing is designed to be opened easily. Simply release the clips or unscrew the fasteners to lift the top cover off and reveal the old filter.
Step-by-Step Process for Removing the Old Air Filter
Once the housing cover is removed, you will see the dirty air filter resting inside. Carefully lift the old filter out of the housing. It is important to inspect the filter for excessive dirt, oil contamination, or damage before discarding it. Check the inside of the housing for any debris, leaves, or small particles that may have accumulated; you can use a vacuum cleaner with a soft brush attachment or a damp cloth to clean the housing interior gently. Avoid getting any dirt into the intake tube that leads to the engine. Compare the old filter with your new one to ensure a perfect match in size and shape. If the old filter is heavily soiled or torn, it is definitely time for a replacement.
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Installing a New Air Filter and Reassembling the System
Now, take your new, high-quality air filter and insert it into the housing in the same orientation as the old one. Ensure the filter sits flush against the edges and that the rubber gasket around its perimeter creates a proper seal. Place the top cover back onto the housing and secure it by reattaching the clips or screws. Make sure all fasteners are tightened evenly to prevent any air leaks, which could allow unfiltered air to enter the engine. Finally, close the hood securely. After installation, it is a good practice to start the engine and let it idle for a minute to ensure there are no unusual sounds or vibrations, confirming the filter is seated correctly.
| Component | Part Number (Example) | Replacement Interval | Tools Needed |
|---|---|---|---|
| Engine Air Filter | MR968446 / 1K0 129 620 | Every 30,000 miles | Phillips screwdriver or clips |
| Cabin Air Filter | MR968447 / 143P1-MX01A | Every 15,000-20,000 miles | No tools (behind glove box) |
| Oil Filter | ME014417 / MZ690072 | Every 7,500 miles | Oil filter wrench |
Frequently Asked Questions
How do I know when the Mitsubishi ASX air filter needs replacement?
A good rule is to inspect the engine air filter every 12,000 miles or 12 months, and replace it around 30,000 miles. Signs include reduced fuel efficiency, sluggish acceleration, a noticeable drop in engine power, or a dirty, clogged filter when visually examined. For the cabin air filter, replace it every 15,000 to 20,000 miles or if you notice reduced airflow or musty odors from the vents.
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What tools are needed to replace the Mitsubishi ASX engine air filter?
Replacing the engine air filter on a Mitsubishi ASX is straightforward and typically requires no specialized tools. You will usually need a Phillips head screwdriver to loosen the clamps on the air filter housing, or sometimes a flathead screwdriver to release clips. For the cabin air filter, you may need a Torx T20 or T25 screwdriver to remove the glove box. That is essentially all you need.
Where is the cabin air filter located in a Mitsubishi ASX?
The cabin air filter in a Mitsubishi ASX is located behind the glove box. To access it, you must first empty the glove box and then release its sides to let it drop down. You may need to remove a few screws from the glove box assembly. Once the glove box is out of the way, you will see a rectangular cover. Slide this cover to remove it, and the old filter will be visible inside.
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Can I install a different brand of air filter in my ASX, or must I use OEM?
You can safely install a high-quality aftermarket air filter in your Mitsubishi ASX, as long as it matches the correct dimensions and shape. For engine filters, brands like K&N, FRAM, or Bosch offer direct replacements. Aftermarket filters often provide comparable filtration or improved airflow. However, using a genuine OEM filter ensures a perfect fit and material quality, which may be preferable for warranty or exacting standards.
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