How to Replace Ignition Coil on 09 Subaru Outback

Key Takeaways

  • Ignition coils are an important part of a vehicle’s ignition system that transforms low voltage into high voltage to ignite the fuel-air mixture in the engine
  • Replacing faulty ignition coils promptly can prevent engine misfires and improve fuel economy
  • Replacing the ignition coils on a 2009 Subaru Outback can be done at home with the right tools and knowledge

If you’re experiencing engine misfires or poor fuel economy on your 2009 Subaru Outback, it may be time to replace your ignition coils. Ignition coils are an essential part of a vehicle’s ignition system that convert low voltage into high voltage to ignite the fuel-air mixture in the engine. Faulty ignition coils can lead to misfires, which can cause damage to the engine over time.

In this guide, we’ll walk you through the steps to replace the ignition coils on your 09 Subaru Outback and get your vehicle running smoothly again.

Materials Needed

  • Replacement ignition coils (compatible with 09 Subaru Outback)
  • Socket wrench set
  • Spark plug socket
  • Dielectric grease
  • Torque wrench
  • Shop towels

Steps to Replace Ignition Coil on 09 Subaru Outback

  1. Park your vehicle on a flat, even surface and apply the parking brake.
  2. Open the hood of your vehicle and locate the ignition coils. There should be four ignition coils on your 09 Subaru Outback, located on top of the engine block.
  3. Disconnect the electrical connector on top of the first ignition coil by pressing down on the tab and pulling it off gently.
  4. Use a socket wrench to remove the bolt on the ignition coil.
  5. Remove the ignition coil by pulling it straight upward. If it feels stuck, you can use a small twisting motion to release it.
  6. Apply a small amount of dielectric grease to the tip of the new ignition coil. This will help prevent corrosion and ensure a good electrical connection.
  7. Insert the new ignition coil into the spark plug hole and push it down until it clicks into place.
  8. Use a torque wrench to tighten the bolt on the new ignition coil to the manufacturer’s specifications (typically between 7-10 ft-lbs).
  9. Reattach the electrical connector to the top of the new ignition coil by pressing down firmly until you hear a click.
  10. Repeat steps 3-9 for the remaining three ignition coils.
  11. Once all four ignition coils have been replaced, start your vehicle and make sure it’s running smoothly.
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🔧 Pro Tip: It’s a good idea to replace all four ignition coils at once, even if only one of them is faulty. This will help ensure consistent performance and prevent future issues with the ignition system.

Frequently Asked Questions

How do I know if my ignition coils are faulty?

If you’re experiencing engine misfires, poor fuel economy, or difficulty starting your vehicle, your ignition coils may be faulty. You can also use a scan tool to check for diagnostic trouble codes related to the ignition system.

How often do I need to replace my ignition coils?

There’s no set lifespan for ignition coils, as their longevity can depend on a variety of factors such as driving conditions, maintenance, and quality of parts. However, it’s typically recommended to replace ignition coils every 100,000 miles or as needed.

Can I replace the ignition coils myself?

Yes, you can replace the ignition coils on your 09 Subaru Outback yourself with the right tools and knowledge. However, if you’re not comfortable working on your vehicle or don’t have the necessary tools, it’s best to consult a professional mechanic.

What happens if I don’t replace my faulty ignition coils?

If you don’t replace faulty ignition coils, it can lead to engine misfires, which can cause damage to the engine over time. It can also lead to poor fuel economy and reduced performance. It’s important to replace faulty ignition coils promptly to prevent these issues.

How much does it cost to replace ignition coils?

The cost to replace ignition coils can vary depending on your location and the quality of parts used. On average, you can expect to pay between $200-$300 for replacement ignition coils and labor.

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Joseph Weaver

With a background in engineering and a passion for cars, Joseph brings a unique perspective to our blog. He's particularly interested in the technology and innovation behind Subaru's advanced safety features, and his articles on this topic are always insightful and informative. When he's not writing, he enjoys playing video games and spending time with his family.

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