Mitsubishi Outlander | Spark Plugs & Ignition Coil Replacement

Is your Mitsubishi Outlander check engine light on, and the engine is misfiring due to faulty spark plugs/ignition coil? Learn how to fix the problem by replacing your Mitsubishi’s spark plugs/ignition coil. This guide provides instructions on how to replace the spark plugs on a 4-cylinder Mitsubishi.

How to Replace Spark Plugs & Ignition Coils on Mitsubishi Outlander

What you will need

• Socket Set
• Extension
• Mitsubishi Spark Plugs (4)
• Spark Plug Tool

Procedure

1. Allow the engine to cool down. 
2. Open the hood by pulling the hood release under the dashboard.
3. Remove two 10mm bolts on top of the engine cover. Remove the engine cover by pulling it forward and up. 
4. Unplug the electrical connector from the ignition coil by pressing it first and then pulling it off. 
5. Remove the ignition coil 10mm bolts.  
6. Next, remove the ignition coils simply by lifting them up. 
7. Remove the spark plugs. You will need a socket extension and a 5/8 socket to remove them. Be gentle, as they are prone to breaking off in the cylinder head.
8. Once you have the plugs out, inspect them to ensure they are not fouled, covered in oil, or missing straps.  If they do, you have bigger problems than just spark plugs.
9. Install the new plugs, put the ignition coils back on, and reconnect them.
10. Start the car and ensure the engine is running smoothly and not shaking.

If the check engine light is on, it will take a few days to reset on its own. You can also use an OBD-II scanner to reset the check engine light yourself. Follow this guide to learn how to reset the Mitsubishi check engine light.

You’re done!

Check these troubleshooting and repair guides for more help on your Mitsubishi.

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