We strongly recommend taking out the housing to replace the air filter. Trying to pull the filter out without taking out the housing is possible but installing the new air filter correctly is harder with the housing still in the car.
What you will need
- Pull the hood release under the hood. Locate the location of the airbox housing on the driver's side of the engine.
- Remove two clips from the air intake resonator assembly.
- Lift the air intake resonator assembly and pull forward to remove it.
- The airbox is now exposed to view.
- Remove 10mm bolt using a 10mm socket and a ratchet.
- Loosen the hose clamp using a 10mm socket and a ratchet.
- Disconnect the MAF engine side electrical connector.
- Pull out the MAF wiring from the airbox clip by hand.
- Disconnect the electrical connector for the Mass Airflow Sensor.
- Pull out the airbox.
- Disconnect the airbox from the air hose.
- View of airbox removed.
- If you have to replace the air filter, unclip the clamps, pull out the air filter, replace it, and re-clip back the clamps.
- Prepare the new airbox.
- Reconnect the air hose to the airbox by aligning the two and pushing the airbox into the correct location.
- Realign the airbox to its bracket, then push it down.
Reconnect the MAF electrical connector.
- Reconnect the MAF wiring to the airbox clip.
- Reinstall and tighten the 10mm bolt.
- Retighten the hose clamp's 10mm bolt.
- Reinstall air intake resonator assembly.
- Reinstall air intake resonator assembly' clips.
The Mitsubishi airbox contains an air filter that protects the engine from ingesting dirt; when the airbox is damaged, dirt would be sucked into the intake and scratch the cylinders resulting in pre-mature engine wear. A damaged airbox could also result in extra air bypassing the MAF sensor, which may cause high rpm at idle. The airbox should be checked annually for damage to avoid the above-mentioned situations.
What does the mass airflow sensor do?
- Mass (air) flow sensors (MAF) measure the flow rate of air entering a fuel-injected internal combustion engine. The air mass information is needed for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine.
When often do you need to replace the air filter on a Mitsubishi?
- Mitsubishi recommends replacing your engine air filter every 30,000 miles or twenty-four months under normal driving conditions. If your vehicle is driven under severe conditions, we recommend inspecting your filter every 15,000 miles or twelve months.