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

In mainly cases, the tools required for change of spark plugs include a special ratchet socket, various extensions and gap gauge to check and adjust gaps on new plugs. . Use a torque wrench to tighten down the new plugs. The best way to replace spark plugs is through pre-purchasing new ones, adjusting them to correct gap and removing one plug at a time. For your specific engine, make sure you choose the correct type of plug when purchasing replacement spark plugs from an auto parts store. Wait until all heat has dissipated from the engine before turning off any plug that exists in it. These engines have aluminum cylinder heads which can be ruined if you take out these spark plugs while the engine is still hot. While waiting for the motor to become cold, inspect new plugs for defects and set their gaps correctly. The clearance is determined by inserting a feeler gauge of appropriate thickness between electrodes at the tip of the plug. The distance between electrodes must match that indicated on Emissions Control Information label. If this spacing is incorrect, use adjuster on gauge body to slightly bend side electrode towards curved side until desired clearance is achieved; or if side electrode does not correspond with center electrode exactly-change its position using adjuster of such kind as well Check for cracks in porcelain insulator On turbocharged engines remove battery and secondary air pump On non-turbocharged engines remove single wire attached to one spark plug Blow out with compressed air if available any dirt or other foreign material around spark plug hole Place socket over top of old plug turn counterclockwise and it will come right out After inspection compare appearance of your spark plug with those shown in chart to get some idea about general running condition Apply a little antiseize compound to threads of new plug It is often convenient when installing a plug into its hole by slipping hose over end so you can more easily start threading Install one of new plugs into hole until no longer possible turn by fingers and then tighten On turbocharged engines, inspect ignition coil before pushing it on end of plug. On non-turbocharged engines, inspect wire to the plug. Repeat this procedure for remaining spark plugs.

Genuine Subaru Impreza Spark Plug

Ignition Spark Plug

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13 Spark Plugs found

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Subaru Impreza Spark Plug
Part Number: 22401AA781
$20.04 MSRP: $29.05
You Save: $9.01 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: SILZKAR7B11
- Replaces: 22401AA780
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2012-2016 Subaru Impreza | Base, Limited, Premium, Sport, Sport Limited
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Subaru Impreza Spark Plug
Part Number: 22401AA880
$24.62 MSRP: $35.68
You Save: $11.06 (31%)
Ships in 1 Business Day
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Product Specifications
- Replaces: 22401AA89A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2017-2023 Subaru Impreza | Base, Limited, Premium, Sport | 4 Cyl 2.0L 5MT, 4 Cyl 2.0L CVT
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Subaru Impreza Spark Plug
Part Number: 22401AA670
$14.96 MSRP: $21.68
You Save: $6.72 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: NGK:SILFR6A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2008-2011 Subaru Impreza | 2.5 GT, STI, STI Special Edition, STI Sport, WRX, WRX Sport, WRXSS | 2.5L H4 Turbo
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Subaru Impreza Spark Plug
Part Number: 22401AA630
$14.96 MSRP: $21.68
You Save: $6.72 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: NGK:ILFR6B
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2007 Subaru Impreza | STI, STI Limited, WRX, WRX TR | 2.5L H4 Turbo
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Subaru Impreza 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:
- 2012-2013 Subaru Impreza | Base, Limited, Premium, Sport, Sport Limited
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Subaru Impreza Spark Plug
Part Number: 22401AA650
$11.16 MSRP: $15.50
You Save: $4.34 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: FR5AP-11
- Replaced by: 22401AA65A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2011 Subaru Impreza | 2.5i, 25i, Outback, Outback Sport, RS | 2.5L H4
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Subaru Impreza Spark Plug
Part Number: 22401AA310
$3.83 MSRP: $5.32
You Save: $1.49 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: NGK:BKR6E-11
- Replaces: 22401AA450, 22401AA540, 22401AA550, 22401KA210
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1993-2004 Subaru Impreza | Base, Brighton, L, L+, LE, LS, LX, Outback, RS, TS | 1.8L H4, 2.2L H4, 2.2L H4 (New EVAPO), 2.2L H4 Series, 2.5L H4, 2.5L H4 SOHC
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Subaru Impreza Spark Plug 2.5L Platinum
Part Number: 22401AA570
$10.99 MSRP: $15.27
You Save: $4.28 (29%)
Ships in 1-2 Business Days
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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 Impreza | RS | 2.5L H4 DOHC
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Subaru Impreza Spark Plug
Part Number: 22401AA550
$3.83 MSRP: $5.32
You Save: $1.49 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: CHAMP:RC10YC4
- Replaced by: 22401AA310
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1995-2004 Subaru Impreza | Brighton, L, LX, Outback, RS, TS | 2.2L H4, 2.2L H4 (New EVAPO), 2.2L H4 Series, 2.5L H4, 2.5L H4 SOHC
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Subaru Impreza Spark Plug
Part Number: 22401AA89A
$24.62 MSRP: $35.68
You Save: $11.06 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: DILKAR7B8
- Replaced by: 22401AA880
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2017-2021 Subaru Impreza | Base, Limited, Premium, Sport
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Subaru Impreza Spark Plug
Part Number: 22401AA531
$10.99 MSRP: $15.27
You Save: $4.28 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: NGK:PFR6G
- Replaced by: 22401AA530
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2002-2005 Subaru Impreza | WRX | 2.0L H4 Turbo
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Subaru Impreza Plug-Spark
Part Number: 22401AA940
$24.97 MSRP: $36.18
You Save: $11.21 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Manufacturer Note: DILKAR7Q8
- Replaced by: 22401AA941
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2024-2025 Subaru Impreza | 4 Cyl 2.0L, 4 Cyl 2.5L
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Subaru Impreza Spark Plug
Part Number: 22401AA540
$3.83 MSRP: $5.32
You Save: $1.49 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: CHAMPION;RC8YC4
- Replaced by: 22401AA310
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1994-1996 Subaru Impreza | Base, Brighton, L, LE, LS | 1.8L H4

Subaru Impreza Spark Plug

The Subaru Impreza Spark Plug threads into the cylinder head and provides the spark that ignites the air and fuel in the engine cylinder. The Spark Plug is positioned so that a precise gap is formed between its central electrode and its side electrode. In Subaru engines, a high voltage from an ignition coil occurs at the Spark Plug. As the gases between electrodes ionize, a hot flash sparks combustion. This fires the piston down on the power stroke. While cruising and at high speed, this device will work hundreds of times per minute at idle and over 1,000 times per minute at cruising speed, repeating the process for thousands of miles. The electrodes can wear or contamination from rich fuel mixtures and excess oil can hinder performance. An engine misfire may be due to fouling of the Spark Plug. A fouled plug can indicate problems elsewhere in the Impreza. A clean Spark Plug with the correct gap will maintain the power and fuel consumption levels expected from an Impreza and also from Subaru cars. It is necessary to have a reliable Spark Plug for the Subaru Impreza's engine to run smoothly.

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Subaru Impreza Spark Plug Parts Questions & Experts Answers

Spark Plug
22401AA670
Q:
What are the necessary tools and steps for spark plug replacement on Subaru Impreza?
Posted by Howard D.
A:
In mainly cases, the tools required for change of spark plugs include a special ratchet socket, various extensions and gap gauge to check and adjust gaps on new plugs. . Use a torque wrench to tighten down the new plugs. The best way to replace spark plugs is through pre-purchasing new ones, adjusting them to correct gap and removing one plug at a time. For your specific engine, make sure you choose the correct type of plug when purchasing replacement spark plugs from an auto parts store. Wait until all heat has dissipated from the engine before turning off any plug that exists in it. These engines have aluminum cylinder heads which can be ruined if you take out these spark plugs while the engine is still hot. While waiting for the motor to become cold, inspect new plugs for defects and set their gaps correctly. The clearance is determined by inserting a feeler gauge of appropriate thickness between electrodes at the tip of the plug. The distance between electrodes must match that indicated on Emissions Control Information label. If this spacing is incorrect, use adjuster on gauge body to slightly bend side electrode towards curved side until desired clearance is achieved; or if side electrode does not correspond with center electrode exactly-change its position using adjuster of such kind as well Check for cracks in porcelain insulator On turbocharged engines remove battery and secondary air pump On non-turbocharged engines remove single wire attached to one spark plug Blow out with compressed air if available any dirt or other foreign material around spark plug hole Place socket over top of old plug turn counterclockwise and it will come right out After inspection compare appearance of your spark plug with those shown in chart to get some idea about general running condition Apply a little antiseize compound to threads of new plug It is often convenient when installing a plug into its hole by slipping hose over end so you can more easily start threading Install one of new plugs into hole until no longer possible turn by fingers and then tighten On turbocharged engines, inspect Ignition Coil before pushing it on end of plug. On non-turbocharged engines, inspect wire to the plug. Repeat this procedure for remaining spark plugs.
Answered by Subaru Parts Specialist William / Jun 22, 2023

Genuine Subaru Impreza Spark Plug

13 Spark Plugs found

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug

Subaru Impreza Plug Spark

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug 2.5L Platinum

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug

Subaru Impreza Plug-Spark

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug

Subaru Impreza Spark Plug Parts Questions & Experts Answers

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