*This post contains affiliate links. That means that if you make a purchase after clicking on a link I may earn a small commission at no extra cost to you. "As an Amazon Associate, I earn from qualifying purchases.” Click here for more Info.

Subaru Spark Plug Replacement Cost: Forester, Legacy, Impreza, Outback

Subaru Spark Plug Replacement

Subaru spark plug replacement is a must-do service for any vehicle because it is directly connected to the efficiency of your vehicle. Replacing the Subaru spark plug is not a difficult task. You can easily do it on your own if you know the process properly.

Subaru Spark Plug Replacement

So, whether you are planning to replace your Subaru spark plugs as a part of regular maintenance or you are planning to replace your wear-out spark plug, this article will guide you to the right path to get your goal.

Check Guide and Tips: Spark Plugs for Subaru Outback, Forester, Legacy, and Impreza

Check special socket for spark plugs and what size are Subaru Outback spark plugs?

How do I know if my spark plugs need changing?

To help you determine whether or not your spark plugs need to be changed, here are some key signs to look out for.

Rough Idling

If your engine is experiencing rough idling, you may need to replace your spark plugs. When spark plugs become worn down, they can cause the engine to misfire and make the vehicle shake. 


Misfiring occurs when spark plugs are worn down and unable to ignite the fuel in the combustion chamber. This can cause the engine to run roughly and cause a loud popping noise from the bay. 

Engine Knocking

Engine knocking is another sign that your spark plugs may need to be replaced. Knocking occurs when the spark plugs cannot ignite the fuel properly, and the fuel builds up in the combustion chamber before igniting it. 

Reduced Acceleration

Finally, if your car’s acceleration lags, your spark plugs could be the culprit. When spark plugs are worn, the fuel will not be burned properly, and the engine will not be able to generate the power it needs to move the vehicle forward.

Subaru spark plug location

The spark plugs on your Subaru are located in the cylinder head. The cylinder head is located at the top of the engine and contains spark plug holes.

Why are Subaru spark plugs so expensive?

There are a few reasons why Subaru spark plugs are so expensive.

First, Subaru spark plugs are made of high-quality materials designed to last. They are made of copper, nickel, and other metals. 

Second, Subaru spark plugs are designed to give you the best performance possible. They are designed to ignite the fuel quickly and efficiently, improving engine performance and fuel economy.

Finally, Subaru spark plugs are also more expensive because they are precision-made. They are made to exact specifications and are tested to ensure they are of the highest quality. 

How do you check spark plugs on a Subaru?

Checking your spark plugs on a Subaru is fairly straightforward. Here’s what you need to do:

  1. Locate the spark plugs: On a Subaru, spark plugs are located on the side of the engine, near the firewall. To access them, you’ll need to remove the engine cover.
  2. Inspect the spark plugs: Once you have access to them, visually inspect them for signs of wear and tear. If the spark plugs look worn or corroded, it’s time to replace them.
  3. Gap the spark plugs: You must gap them correctly before reinstalling them. To do this, use a spark plug gapping tool to adjust the gap between the electrodes. The correct gap is usually around 0.028 – 0.032 inches.
  4. Install the spark plugs: Reinstall them into their respective ports once the spark plug gap is correct. Tighten the spark plugs to the appropriate torque setting.
  5. Test the spark plugs: After installing them, it’s a good idea to test them. Start the engine and listen for any misfires or rough idle. If everything sounds normal, you’re all set.

Subaru Spark Plug Replacement – Why it is needed?

Subaru Spark Plug Replacement – When It Is Needed

When you drive your Subaru model for a long time (30000-40000 miles), then you must have your spark plugs replaced no matter they wear off or not. They are sensitive and critical parts that can get damaged any time after driving your Subaru for a long time.

They also ensure the best possible fuel economy, performance, durability, and reliability. And the reason behind this is spark plugs are the ones that provide ignition to the fuel and air mixture in the engine of your vehicle so that it can keep it running.

Subaru Spark Plug Replacement – When it is needed?

Subaru Spark Plug Replacement – When It Is Needed

Usually, most of the drivers of Subaru replace the spark plugs at around 60000 miles in the first place. Later, you have to replace it again every 30000 miles after that.

Spark plugs play an important role in tuning up the engine for any vehicle. It even includes the famous BOXER under every Subaru’s hood.

Subaru Impreza Spark Plug Replacement Cost [Added Legacy, Outback]

Subaru Impreza Spark Plug Replacement Cost

Replacement cost for Subaru Impreza spark plug varies from model to model. 2006 Subaru Impreza spark plug replacement cost is estimated at $560.

  • 2010 Subaru Impreza spark plug replacement cost is estimated at $254.
  • 2006 Subaru Impreza (No Turbo) spark plug replacement cost is estimated at $281.
  • 2002 Subaru Impreza spark plug replacement cost is estimated at $273.
  • 2014 Subaru Impreza spark plug replacement cost is estimated at $405.
  • 2000 Subaru Impreza spark plug replacement cost is estimated at $235.
  • 1997 (1.8L) Subaru Impreza spark plug replacement cost is estimated at $294.
  • 1997 (2.2L) Subaru Impreza spark plug replacement cost is estimated at $240.
  • Subaru legacy spark plug replacement cost: is $165 with $70 for parts and $95 for labor.
  • Subaru forester spark plug replacement cost is $174 with $70 for parts and $104 for labor.

So, find your model and check out the replacement cost from the above-mentioned price range.

Subaru spark plug replacement interval

Usually, Subaru spark plugs are the first ones that get replaced among the other parts after reaching around 60,000 miles and after the first replacement, the interval will be 30,000 miles. So after reaching every 30,000 miles before the first replacement, you need to change the spark plugs. 

People Also Asked

#1. When should I change my Subaru Spark Plugs?

You should change your Subaru spark plugs after 60,000 miles at first and then again after every 30,000 miles to keep your Subaru spark plugs healthy and efficient.

Otherwise, it may reduce the efficiency of your engine and car which will eventually damage the engine of your vehicle.

#2. How much does it cost to change spark plugs on a Subaru?

The replacement cost of your Subaru is depended on the model of your Subaru because it varies from model to model. Therefore, you need to know your Subaru model to learn about its replacement cost.

But on an average note, the replacement cost for Subaru starts at $250 and goes up to $560. If we go with the dealer price, then it will go up to $830.

#3. How do you change spark plugs on a Subaru?

Here are the steps you need to follow to change spark plugs on a Subaru:

  1. Order the right replacement of spark plugs
  2. Removal of the air filter from the housing
  3. Lift the engine properly (Not necessary)
  4. Removal of the ignition coils
  5. Remove the spark plugs of your vehicle
  6. Finally, install the new ones, and you are done.

#4. How much does it cost to replace all spark plugs?

The average cost to replace all spark plugs is between $190 and $250 including the labor cost. But if you want to do it on your own then it will cost you only $65 to $90.

So, as you can see the labor cost is between $125 and $160. Though this price range doesn’t include any vat or taxes as well as does vary in terms of specific vehicles or distant locations.

#5. At what mileage should spark plugs be replaced?

And as a rule of thumb or as per the golden rules, we will suggest you replace spark plugs after every 30,000 miles because this suggestion will also fall in the same line with most of the recommendations of the manufacturers. You can easily check the website of the manufacturer or your owner’s manual to get proper information specifically instructed for your vehicle and model. 

#6. How often should you change spark plugs to Subaru crosstrek?

Usually, most of the spark plugs Subaru requires a change in the spark plugs Subaru Crosstrek first time after hitting around 60,000 miles on the meter. After that, you need to change again every 30,000 miles. 

#7. How often to change spark plugs on Subaru forester?

Like all the other models of Subaru, Subaru Forester also requires changing after crossing 60,000 miles at first and again after every 30,000 miles before that. 

#8. How often to change spark plugs wrx?

Spark plugs are an integral and important part of tuning up any vehicle or engine. And the same thing goes with the popular and famous BOXER and the spark plugs remain under the main hood of every Subaru. The rules for changing spark plugs wrx are the same as before here as well, the first one after hitting 60K miles and again after every 30K miles. 


Spark plug replacements will keep your vehicle running for a long time without causing any trouble or damaging your engine.

But if you do not replace spark plugs, then it will continue to trouble with issues like engine misfires, stalling, and starting issues. You won’t require to change the high-cost platinum spark plugs often.

But regular spark plugs should get replaced after a certain period to keep the engine efficient and your vehicle healthy and running.

Similar Posts