What are the necessary tools and steps for spark plug replacement on Subaru Forester?

Typically, the following tools are needed when replacing a spark plug, a spark plug socket that fits into a ratchet, a range of extensions and also a gap gauge for checking and adjusting the new plugs. A torque wrench should be used to secure the new plugs. The best method of changing these components is to get them first, regulate their gaps accurately and then replace one after another. However, let the engine cool before taking out any of the old plugs. Look at all your new plugs for defects and alter their gaps if possible. You insert the proper-thickness gage between electrodes at the tip of the plug to check its gap. There should be equal distance between both electrodes as indicated. If it's wrong, use adjuster on gauge body to slightly bend curved side electrode until correct gap is achieved. If you have turbo engines, remove battery and battery tray too. When fitted take off engine cover first then eliminate air intake ducts plus resonator or air filter housing on models obstructing access to spark plugs locations. Start with detaching individual ignition coils from turbo engines so as to get access to spark plugs. After removing one wire from one non-turbo engine, blow off any dirt or other foreign material inside that space if you are lucky enough to have compressed air with you around this time! Put the spark plug socket over it in order to remove it from its place by turning it anti-clockwise. To get an idea about how your engine has been running generally examine your chart with respect to this particular spark plug alone .Apply just a little amount of anti-seize compound on screw end of plugs .At least put one of those fresh units into socket until manual grip strength fades away; after that tighten using an electric wrench or similar hand tool set.Rotate-push down onto coil after reaching lug ensuring not touching ignition points at all before snapping it onto this spot for however many more times.Remove each wire to be sure in the case of a non-turbo engine. Carry out these same steps on all the remaining ones.

Genuine Subaru Forester Spark Plug

Ignition Spark Plug

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

9 Spark Plugs found

View related parts
Subaru Forester Spark Plug
Part Number: 22401AA781
$20.04 MSRP: $29.05
You Save: $9.01 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: SILZKAR7B11
- Replaces: 22401AA780
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011-2018 Subaru Forester | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring, X, X Limited, X Premium | 2.5L H4, 2.5L H4 DOHC
View related parts
Subaru Forester Spark Plug
Part Number: 22401AA830
$24.22 MSRP: $35.10
You Save: $10.88 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: ILKAR8H6
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2014-2018 Subaru Forester | 2.0XT Premium, 2.0XT Touring | 2.0L H4
View related parts
Subaru Forester Spark Plug
Part Number: 22401AA670
$14.96 MSRP: $21.68
You Save: $6.72 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: NGK:SILFR6A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2009-2013 Subaru Forester | XT, XT Limited | 2.5L H4 DOHC Turbo
View related parts
Subaru Forester Spark Plug
Part Number: 22401AA630
$14.96 MSRP: $21.68
You Save: $6.72 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: NGK:ILFR6B
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2008 Subaru Forester | Forester Sports, XT | 2.5L H4 Turbo
View related parts
Subaru Forester Plug Spark
Part Number: 22401AA780
$20.04 MSRP: $29.05
You Save: $9.01 (32%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug
- Manufacturer Note: SILZKAR7B11
- Replaced by: 22401AA781
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2011-2014 Subaru Forester | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Touring, X, X Limited, X Premium | 2.5L H4, 2.5L H4 DOHC
View related parts
Subaru Forester Spark Plug
Part Number: 22401AA650
$11.16 MSRP: $15.50
You Save: $4.34 (28%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: FR5AP-11
- Replaced by: 22401AA65A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2010 Subaru Forester | Forester Sports, L.L.Bean, X, X Limited, XS | 2.5L H4, 2.5L H4 SOHC
View related parts
Subaru Forester Spark Plug 2.5L Platinum
Part Number: 22401AA570
$10.99 MSRP: $15.27
You Save: $4.28 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Spark Plug
- Manufacturer Note: NGK:PFR5B-11
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1998 Subaru Forester | Base, L, S | 2.5L H4 DOHC, 2.5L H4 DOHC (New EVAPO)
View related parts
Subaru Forester Spark Plug
Part Number: 22401AA550
$3.83 MSRP: $5.32
You Save: $1.49 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: CHAMP:RC10YC4
- Replaced by: 22401AA310
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1999-2004 Subaru Forester | Base, L, S, X, XS | 2.5L H4, 2.5L H4 SOHC
View related parts
Subaru Forester Plug-Spark
Part Number: 22401AA940
$24.97 MSRP: $36.18
You Save: $11.21 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: DILKAR7Q8
- Replaced by: 22401AA941
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2019-2021 Subaru Forester | Base, Limited, Premium, Sport, Touring

Subaru Forester Spark Plug

The Spark Plug in your Subaru Forester provides an electric spark to ignite the air-fuel mixture inside the cylinders. The device consists of a central electrode located within a ceramic insulator and a metal threaded shell. When high voltage hits the tip from the ignition coil, a spark jumps the gap to the side electrode to ignite the gas and push the piston down. At idle, it fires hundreds of times per minute, while more than a thousand times per minute when cruising. It has a very robust construction because it needs to withstand heat and pressure, which work together to broaden the gap and wear the electrodes with the thousands of firings. The Spark Plug gap increases over time, causing misfiring on cold startup in a Subaru Forester, which leads to rough idling. This makes the ignition coil produce stronger pulses. At the right intervals, changing the Spark Plug will not only lighten the load on ignition parts, but it will also help to keep your Forester engine working efficiently. A good Spark Plug allows a Subaru engine to run smoothly for many miles. The Subaru Forester uses a proven Spark Plug design that strikes a workable balance between reliable ignition and longevity, and the owner benefits when the Spark Plug gap is within specification.

Our website stands as the go-to online destination for OEM Subaru Forester Spark Plug. With complete lines of genuine Subaru Forester Spark Plug available at unbeatable market prices, we ensure top quality, reliability, and durability. Each part comes backed by the manufacturer's warranty, reinforcing your trust in our offerings.

Subaru Forester Spark Plug Parts Questions & Experts Answers

Spark Plug
22401AA550
Q:
What are the necessary tools and steps for spark plug replacement on Subaru Forester?
Posted by Juan B.
A:
Typically, the following tools are needed when replacing a spark plug, a spark plug socket that fits into a ratchet, a range of extensions and also a gap gauge for checking and adjusting the new plugs. A torque wrench should be used to secure the new plugs. The best method of changing these components is to get them first, regulate their gaps accurately and then replace one after another. However, let the engine cool before taking out any of the old plugs. Look at all your new plugs for defects and alter their gaps if possible. You insert the proper-thickness gage between electrodes at the tip of the plug to check its gap. There should be equal distance between both electrodes as indicated. If it's wrong, use adjuster on gauge body to slightly bend curved side electrode until correct gap is achieved. If you have turbo engines, remove battery and battery tray too. When fitted take off engine cover first then eliminate air intake ducts plus resonator or air filter housing on models obstructing access to spark plugs locations. Start with detaching individual Ignition Coils from turbo engines so as to get access to spark plugs. After removing one wire from one non-turbo engine, blow off any dirt or other foreign material inside that space if you are lucky enough to have compressed air with you around this time! Put the spark plug socket over it in order to remove it from its place by turning it anti-clockwise. To get an idea about how your engine has been running generally examine your chart with respect to this particular spark plug alone .Apply just a little amount of anti-seize compound on screw end of plugs .At least put one of those fresh units into socket until manual grip strength fades away; after that tighten using an electric wrench or similar hand tool set.Rotate-push down onto coil after reaching lug ensuring not touching ignition points at all before snapping it onto this spot for however many more times.Remove each wire to be sure in the case of a non-turbo engine. Carry out these same steps on all the remaining ones.
Answered by Subaru Parts Specialist Edgar / Nov 02, 2024