How to Replace Coils 06-17 Nissan Altima

Introduction

This tutorial will guide you through the process of replacing the ignition coils on a 2006-2017 Nissan Altima. Ignition coils are essential for the ignition system, converting battery voltage into the high voltage needed to ignite the fuel-air mixture in the engine. A faulty coil can lead to poor engine performance, reduced fuel efficiency, and increased emissions. Follow these steps to ensure a successful ignition coil replacement.

Step 1: Gather Necessary Tools

Before starting the replacement, make sure you have the following tools:

• Flat Blade Screwdriver
• 10mm Socket
• Ratchet
• Socket Extensions
• 5mm Hex Wrench

These tools will help you remove the components needed to access the ignition coils.

Step 2: Prepare the Vehicle

• Ensure the vehicle is parked on a flat surface and the engine is turned off.
• Disconnect the battery to prevent any electrical hazards. Always remove the negative terminal first.

Step 3: Locate the Ignition Coils

• Open the hood and locate the ignition coils. They are typically situated on top of the engine, attached to the spark plugs.
• If necessary, refer to your vehicle's manual for the exact location.

Step 4: Remove Engine Cover (if applicable)

• If your model has an engine cover, use a flat blade screwdriver or a socket to remove any screws or bolts holding it in place.
• Gently lift the cover off and set it aside.

Step 5: Disconnect the Ignition Coil Connectors

• Carefully unplug the electrical connectors from each ignition coil.
• Press the release tab on the connector and pull it straight out to avoid damaging the wiring.

Step 6: Remove the Ignition Coils

• Use a 10mm socket to remove the bolts securing each ignition coil in place.
• Once the bolts are removed, gently pull the ignition coils straight out of the spark plug wells.

Step 7: Install the New Ignition Coils

• Take the new ignition coils and align them with the spark plug wells.
• Push them down firmly until they are fully seated, ensuring a secure fit.

Step 8: Reattach Ignition Coil Connectors

• Plug the electrical connectors back into each ignition coil. Ensure they click into place for a secure connection.

Step 9: Reinstall Engine Cover (if applicable)

• If you removed an engine cover, place it back onto the engine and secure it with the screws or bolts.

Step 10: Reconnect the Battery

• Reconnect the negative battery terminal first, followed by the positive terminal.
• Ensure the connections are tight to avoid any electrical issues.

Conclusion

Replacing the ignition coils on your Nissan Altima is a straightforward process that can greatly enhance your vehicle's performance. By following these steps, you can ensure that your ignition system operates efficiently. If you're still experiencing issues after the replacement, consider consulting a professional mechanic for further diagnosis. Happy driving!