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.

What you will need

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Newparts NGK Set of 4 Laser Iridium Spark Plugs For Mitsubishi Outlander 14-20 2.4l L4

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Set of 2 Ignition Coils Pack for Mitsubishi Eclipse Galant Lancer Mirage Outlander Dodge Stratus

YHTAUTO Affordable and Prime Ignition Coils, Directly Fit; Fits for Mitsubishi Lancer 2002-2004 2.0L 4G94, Mirage 1997-2002 1.8L 4G93

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• 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 engine cover by pulling it forward and up. 
4. Unplug the electrical connector from the ignition coil by pressing the connector first then pulling it off the coil. 
5. Remove 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 the plugs.  Be gentle.  They are prone to breaking off in the cylinder head.
8. Once you have the plugs out, inspect them to make sure they are not fouled, covered in oil, or have straps missing.  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 make sure the engine is running smoothly and not shaking.

If the check engine light was on, it will take a few days for it to reset it on its own. Or 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!

We hope you find the Mitsubishi Outlander | Spark Plugs & Ignition Coil Replacement guide helpful. Check these troubleshooting and repair guides for more help on your Mitsubishi.