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Subaru Spark Plug Socket | Benefits, Sizes & Servicing Tips

Subaru Spark Plug Socket

What is Subaru Spark Plug Socket?

Most of the spark plugs need a 16mm or 5/8 inches size spark socket plug to work properly. The number indicates the flat side of the spark plug which is in direct contact with the plug socket. They are mainly used for removing or fitting spark plugs from your engine.

Subaru Spark Plug Socket

They will usually possess a rubber foam insert that locates inside of the socket as well as offers service to assist in holding the spark plugs perfectly, and prevents them from getting damaged by the internal walls of the plug socket.

Check Guide on Spark Plugs for Subaru Outback, Forester, Legacy, and Impreza And

Check How much does it cost to change spark plugs on a Subaru, Outback Forester, Legacy, Impreza?

Benefits of Using Subaru Spark Plug Socket

What Is Subaru Spark Plug Socket

A Subaru spark plug socket is one of a kind socket specifically made for installing and removing spark plugs without causing any harm or damage to them.

QISF 14MM & 16MM Thin Wall Magnetic Swivel subaru Spark Plug Socket

Here I recommended QISF 14MM & 16MM Thin Wall Magnetic Swivel Spark Plug Socket. It is the best spark plug socket for Subaru forester:3/8-Inch Drive 12-Point Spark Plug Socket Removal Tool is durable heat-treated Chrome Vanadium Steel.

Some of these spark plug sockets have rubber inserts, whereas the others have magnets so that they can hold the spark plug socket in right place.

It does make the installing and removing job much easier. When we have to talk about the advantages of the Subaru spark plug socket, we must require to mention the improvement of your fuel economy.

ARES 11000 - 14mm Thin Wall Magnetic Swivel Spark Plug Socket

ARES 11000 – 14mm Thin Wall Magnetic Swivel Spark Plug Socket is perfect for Subaru Crosstrek and Subaru Outback. 3/8-Inch Drive 12-Point Spark Plug Socket(its walls are only 17.7mm thick) interior magnet retains and protects the spark plug

Iridium spark plugs are the main reason behind this. This benefit happens because you possess a better ignition profile which permits the fuel to burn efficiently.

Though the rates of efficiency are not very high like you expect, still most drivers will experience a gain of 10%-20% over an entire gasoline tank.

Subaru Spark Plug Thread Size

Subaru Spark Plug Thread Size

The size of the Subaru spark plug thread is 14mm or 9/16 inches only.

Subaru Legacy Spark Plug Socket Size

Subaru Legacy spark plug socket size is only 5/8 inches or 16mm.

Specialist Subaru Spark Plug Tool

It is quite easy to take apart a Subaru spark plug and you won’t even require any special tool to do so. A torque wrench and a good set of the socket can do the work for you pretty easily.

But the main trick with the tools is to find the right combination between the lengths and extensions.

If you have the wrench and socket set as well as the precise combination of the extensions and lengths, then there will be nothing required for taking apart Subaru spark plugs. So, you can see there is no need for any specialist tool in Subaru spark plugs.

Subaru Spark Plug Service

Subaru Spark Plug Service

Spark plugs make ignition into the mixture of the fuel in the engine as well as provide the necessary power to make your vehicle run.

But when you will drive 30000-40000 miles with your vehicle, then your conventional spark plugs will wear out and you must require to install new ones.

This is where Subaru spark plug services are necessary. Because this service will make the removal of the old one and installing the new one possible.

Changing Subaru spark plugs

Here’s a general guide on what you’ll need to do to change your Subaru spark plugs: 

1. Gather the necessary tools

You’ll need a spark plug wrench, a spark plug gapper and gap setting, and some type of lubricating oil for standard spark plugs. 

2. Locate your spark plugs

This can be done by removing the engine cover and tracing the spark plug wires to the spark plugs. Before you remove the spark plugs, use a socket to break their hold in the cylinder head by turning it 1/4 of a turn.

3. Remove the spark plugs

After loosening the spark plugs, remove them from the cylinder head with a spark plug wrench. 

4. Gap and install the new spark plugs

Apply a small amount of lubricating oil to the spark plug threads and tighten the spark plugs to the recommended torque specifications.

5. Replace the engine cover

Now that you’ve replaced the spark plugs, you can replace the engine cover and enjoy the improved performance of your newly serviced Subaru.

Subaru spark plug replacement interval

Luckily, Subaru owners do not need to worry about this issue too often – spark plug replacement can often be delayed up to every 100,000 miles.

Subaru spark plugs replacement Cost

That depends on a few things, such as the type of Subaru you own, the car’s age, and the type of spark plugs your car requires. Generally, expect to pay between $75 and $203 for a professional spark plug replacement on a Subaru.

Factors that determine spark plug replacement cost in a Subaru

1. Type of Subaru

The cost to replace spark plugs in a Subaru can vary considerably depending on the specifics of the vehicle. Your Subaru’s make, model, engine type, and year affect the parts and labor required for spark plug replacement.  

2. Age of the Vehicle

The age of the car can also have an impact on the cost of spark plug replacement. An older Subaru might require specific spark plugs that may be more expensive than newer options. 

3. Type of Spark Plugs

Different spark plugs can be used in Subarus, including platinum, iridium, and copper. While platinum and iridium spark plugs tend to last the longest, they come with a higher price tag. Copper spark plugs are slightly cheaper but must be replaced more frequently. 

Subaru Impreza spark plug socket size

The spark plug socket size of the Subaru Impreza is 14mm. This 14mm size is perfect for the Impreza’s 2.5-liter engine, as well as its turbocharged 2.0-liter engine.

Subaru forester spark plug socket size

The most common size for spark plugs in a Subaru Forester is an 8-10mm socket size. This size will fit the spark plug holes in a Forester and is the most suitable type of spark plug for the Forester engine.

How long do Subaru spark plugs last?

Regarding the life expectancy of Subaru spark plugs, the consensus is that they will last up to 100,000 miles depending on the conditions of your car’s engine.

2000 Subaru spark plug socket size

The right spark plug socket size for a 2000 Subaru is 14 mm. This is the size of the socket you’ll need if you’re replacing the spark plug yourself or taking your vehicle to a repair shop that won’t be familiar with the Subaru.

2003 Subaru spark plug socket size

The size you’ll need for repairing your 2003 Subaru is a 14mm spark plug socket. This size will fit most Subaru models from 2003 and beyond.

Subaru wrx spark plug socket size

The spark plug socket size for a Subaru Forester is 14 mm. This site is a common one that is compatible with many automotive parts from different vehicle models.

Frequently Asked Questions

#1. Do you need a special socket for spark plugs?

No, you don’t require a special socket for spark plugs to install and remove. A deep plug socket of the right size will do the tricks for you in most cases.

But the condition to make that happen is having enough patience and use it to some pliers so that it can go along perfectly with the socket.

#2. What size are Subaru Outback spark plugs?

Subaru Outback spark plugs are of the same standard size as spark plugs and which is 5/8 inches or 16mm.

#3. What is the standard-size spark plug socket?

There are two different sizes of spark plug sockets. One is 5/8 inches, whereas the other one is 13/16 inches. These spark plug sockets will possess a rubber insert that will hold and keep the plug perfectly in place.

If your Subaru spark plugs are hard to reach, then a universal joint can be a solution for you.

#3. What brand of spark plugs does Subaru use?

These are the brands of spark plugs that Subaru uses as follows:

  1. Subaru OEM Spark Plugs
  2. NGK Outback Legacy
  3. Non Turbo Impreza Forester


Subaru spark plug sockets play a vital role in maintaining your vehicle in the right shape and efficient performance. They are an integral part of your vehicle’s engine and they certainly can influence the efficiency of the performance of your vehicle.

Without this, your vehicle will face stalling, misfires, and starting problems which will eventually damage your entire engine and cost you a lot of money for repairs.

Therefore, installing Subaru spark plug sockets will help your vehicle keep out those troubles and maintain an efficient performance for many years.

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