Best Spark Plugs For Subaru Impreza by Model and Engine

#1 · Best Overall

1. Sixity NGK Laser Iridium

• Weight: 6.2 oz

Best for: 2017–2020 2.0L Impreza owners.

Why it ranks #1: The four-pack is listed for 2017–2020 Impreza 2.0L H4 models and includes genuine NGK parts, original packaging, and hardware.

Laser Iridium construction is the defining feature of this four-plug NGK set, offering a direct-replacement option for listed 2017–2020 Subaru Impreza 2.0L H4 models. Its vehicle-specific year and engine range helps owners narrow the choice to a plug set explicitly associated with their Impreza generation.

The four-piece pack covers the listed four-cylinder engine’s plug replacement needs as a set, while the Laser Iridium designation identifies the electrode technology rather than a generic plug type. Sixity Auto describes the plugs as genuine NGK parts and direct replacements, which supports a like-for-like service choice. Original packaging and hardware are included, so the supplied kit brings those items together. The stated compatibility is specifically for 2017–2020 Impreza 2.0L H4 models, not every Impreza.

Skip it if you own a 2012–2016 2.0L H4 Impreza; the NGK Iridium IX set from Sixity Auto lists those years instead.

This set suits owners servicing a listed 2017–2020 2.0L H4 Impreza who want four genuine NGK Laser Iridium plugs with hardware included. Its stated application does not cover other Impreza years or engine sizes.

Listed on Amazon as: 4 pc NGK Laser Iridium Spark Plugs for Subaru Impreza 2.0L H4 2017-20

#2 · Best 2012–2016 Fit

2. Sixity NGK Iridium IX

• Core Material: Iridium
• Top Material Type: Iridium
• Compatible with Vehicle Type: Car, Truck

Best for: 2012–2016 Impreza 2.0L service.

Why it ranks #2: This four-pack specifically fits 2012–2016 Impreza 2.0L H4 models; specifications list iridium construction and a 0.04-inch gap.

A 0.04-inch gap specification distinguishes this four-pack of NGK Iridium IX plugs for listed 2012–2016 Subaru Impreza 2.0L H4 models. The stated year and engine coverage gives owners of those cars a focused replacement option, while its iridium core and top identify the plug material.

Sixity Auto lists this four-pack as genuine NGK Iridium IX and a direct replacement for the specified Impreza range. That combination gives owners a vehicle-specific set rather than a general-purpose listing. The stated 0.04-inch gap is a useful plug specification when checking the part against service information, while the original packaging and hardware are included in the pack. Its stated fitment is for 2012–2016 2.0L H4 Imprezas, so other generations are outside this listing.

Skip it if you have a 2017–2020 2.0L H4 Impreza; Sixity Auto’s NGK Laser Iridium set lists those model years.

Choose this set for a listed 2012–2016 2.0L H4 Impreza service when you want NGK Iridium IX plugs and a stated gap specification. Owners of other years or engine sizes should look beyond this fitment.

Listed on Amazon as: 4 pc NGK Iridium IX Spark Plugs for Subaru Impreza 2.0L H4 2012-16

#3 · Best WRX Fit

3. NGK SILFR6A Laser Iridium

• Core Material: Iridium
• Top Material Type: Ceramic, Metal
• Compatible with Vehicle Type: Car

Best for: 2008–2014 Impreza WRX STI owners.

Why it ranks #3: The four-pack is listed for 2008–2014 Impreza WRX STI models with the 2.5L H4, a distinct fitment from standard 2.0L models.

NGK Laser Iridium plugs specifically listed for 2008–2014 Subaru Impreza WRX STI 2.5L applications make this four-pack the most targeted choice here for that performance-model range. The listing also names a 2.5L, 2,458 cc four-cylinder engine, narrowing its stated use clearly.

The four-pack combines an iridium plug designation with a copper core that the listing says aids heat removal, connecting material details to operating conditions. A pure alumina silicate ceramic insulator is described as providing strength and heat transfer, while trivalent metal plating addresses corrosion and seizing. Corrugated ribs prevent flashover and triple seals prevent leakage, according to the product information. Its stated application is for 2008–2014 2.5L WRX STI models, not standard 2.0L Imprezas.

Skip it if you have a standard 2012–2016 2.0L H4 Impreza; Sixity Auto’s NGK Iridium IX set lists that application.

This set is for owners of the stated 2008–2014 Impreza WRX STI 2.5L application seeking NGK Laser Iridium plugs. Its specific engine and model coverage makes it unsuitable as a general Impreza choice.

Listed on Amazon as: NGK Laser Iridium Spark Plug SILFR6A (4 Pack) Compatible With SUBARU IMPREZA WRX STI 2008-2014 2.5L/2458cc

#4 · Genuine Subaru Set

4. Subaru 22401AA781

• Core Material: Copper
• Top Material Type: Copper
• Compatible with Vehicle Type: UTV

Best for: Genuine Subaru non-turbo owners.

Why it ranks #4: This genuine Subaru four-pack includes Impreza non-turbo 2.0L applications from 2012–2016, with the OEM part number 22401AA781.

Genuine Subaru plugs, part 22401AA781, are the defining feature of this four-piece set, which explicitly lists non-turbo 2012–2016 Impreza 2.0 applications. That factory-branded specification gives owners seeking an OEM replacement a clearly named part and a bounded vehicle fitment.

The set supplies four genuine Subaru plugs, matching the listed Impreza application as a complete set rather than a single replacement. Its stated coverage is non-turbo Impreza 2.0 models from 2012–2016; the same listing also names other Subaru vehicles, but those do not expand the Impreza fitment. The additional description identifies iridium-tipped plugs, while the specifications list copper core and top material. Check the exact application details carefully because the listing is limited by engine and turbo status.

Skip it if you have a turbocharged Impreza; Sixity Auto’s Champion Iridium set lists 2012–2020 2.0L H4 Imprezas without that non-turbo restriction.

This set fits the stated buyer seeking genuine Subaru plugs for a non-turbo 2012–2016 Impreza 2.0. Its application is not a general match for every Impreza, particularly turbo versions or other engine sizes.

Listed on Amazon as: Subaru 2011-2019 Forester Impreza Legacy Crosstrek Set 4 Spark Plugs – 22401AA781 x4 – Genuine OEM

#5

5. Sixity Champion Iridium

• Weight: 6.4 oz

Best for: 2012–2020 Champion plug shoppers.

Why it ranks #5: The four-pack lists Impreza 2.0L H4 fitment across 2012–2020 and uses Champion iridium plugs, though the broad range needs vehicle-specific confirmation.

Champion Iridium coverage across listed 2012–2020 Subaru Impreza 2.0L H4 models distinguishes this four-pack from year-narrower listings. The stated range lets owners compare one Champion option across several listed model years, with genuine Champion parts identified by the seller.

The four-plug set is listed for 2.0L H4 Imprezas from 2012 through 2020, giving owners a broad stated year span within that engine configuration. Its additional application details specify a 0.044-inch gap, a practical reference when checking the listed plug against service requirements. Sixity Auto identifies the parts as genuine Champion iridium plugs. These details support selection within the stated engine and years, but do not extend the listing to other Impreza engines or generations.

Skip it if you have a 1995–2011 2.2L or 2.5L H4 Impreza; Sixity Auto’s NGK Iridium IX set lists those older engine applications.

Choose this set when your Impreza falls within the listed 2012–2020 2.0L H4 range and you want Champion Iridium plugs. The stated application does not cover other engine sizes or earlier models.

Listed on Amazon as: 4 pc Champion Iridium Spark Plugs for Subaru Impreza 2.0L H4 2012-20

#6

6. Sixity NGK G-Power

• Weight: 7.7 oz

Best for: 2012–2016 G-Power replacements.

Why it ranks #6: This four-pack is listed for 2012–2016 Impreza 2.0L H4 models and supplies genuine NGK G-Power plugs for that specific application.

NGK G-Power plugs offer a distinct alternative for the listed 2012–2016 Subaru Impreza 2.0L H4, supplied as a four-pack. Their named series and explicit year-and-engine application give owners a focused NGK replacement choice for this Impreza range.

The listing identifies the plugs as genuine NGK G-Power parts and direct replacement auto parts for the specified 2.0L H4 Impreza years. Four plugs are supplied, supporting a set-based replacement rather than piecemeal ordering. Original packaging and hardware are included, and the stated compatibility spans 2012 through 2016. The product details do not provide a gap measurement or material specification, so buyers comparing those technical details will need information beyond this listing.

Skip it if you want a stated gap specification for a 2012–2016 2.0L H4 Impreza; Sixity Auto’s NGK Iridium IX listing specifies 0.04 inch.

This set suits owners of listed 2012–2016 2.0L H4 Imprezas who want a four-piece NGK G-Power replacement kit with hardware included. Buyers needing a stated gap measurement should note that it is not supplied here.

Listed on Amazon as: 4 pc NGK G-Power Spark Plugs compatible with Subaru Impreza 2.0L H4 2012-16

#7 · Best Older Impreza Fit

7. Sixity NGK Iridium IX

• Weight: 7 oz

Best for: 1995–2011 older Impreza owners.

Why it ranks #7: The four-pack lists Impreza 2.2L and 2.5L H4 models from 1995–2011, covering older engines not addressed by newer 2.0L sets.

NGK Iridium IX plugs covering listed 1995–2011 Subaru Impreza 2.2L and 2.5L H4 models distinguish this four-pack as an older-generation option. The broad year span and named engine sizes help owners identify whether their vehicle falls within the supplied application.

The set includes four genuine NGK Iridium IX plugs and is described as a direct-replacement auto part, bringing a full set together for the specified Impreza range. Its stated applications include 2.2L and 2.5L H4 models from 1995 through 2011, while original packaging and hardware are included. That coverage is useful for owners of those older engine configurations, but it does not list 1.8L engines or newer Impreza years. Confirming the exact application remains important within the broad range.

Skip it if you have a 1993–2004 1.8L H4 Impreza; Subaru’s genuine 22401AA310 set lists that engine application.

This set suits owners of listed 1995–2011 2.2L or 2.5L H4 Imprezas wanting four NGK Iridium IX plugs. Its stated range does not include 1.8L engines or Imprezas from later years.

Listed on Amazon as: 4 pc NGK Iridium IX Spark Plugs for Subaru Impreza 2.2L 2.5L H4 1995-2011

#8

8. Subaru 22401AA310

• Core Material: Copper
• Top Material Type: Copper
• Compatible with Vehicle Type: UTV

Best for: Older non-turbo Impreza owners.

Why it ranks #8: This genuine Subaru four-pack includes listed Impreza 1.8L, 2.2L, and 2.5L H4 non-turbo applications from 1993–2004.

Genuine Subaru identity and a four-plug set define this 22401AA310 listing, whose stated Impreza coverage includes 1993–2004 1.8L, 2.2L, and 2.5L H4 SOHC non-turbo models. The named part and engine range help owners of older Imprezas identify a specific replacement option.

The listing specifies Subaru part 22401AA310 and a 14 mm thread, useful details when identifying the plug for a compatible older application. Four plugs are supplied, making the package a complete set for the listed four-cylinder service. Its Impreza coverage is specifically described as 1993–2004 H4 SOHC non-turbo engines, including 1.8L, 2.2L, and 2.5L. A separate description mentions other Subaru model years, so buyers should rely on the specific Impreza application rather than general brand wording.

Skip it if you own a 2012–2016 Impreza 2.0; Subaru’s 22401AA781 genuine set specifically lists that non-turbo application.

This is a candidate for owners of the listed older 1.8L, 2.2L, or 2.5L H4 SOHC non-turbo Impreza. Its stated range does not cover later generations or turbo applications.

Listed on Amazon as: Subaru Spark Plugs Set of 4 22401AA310 Impreza Outback Legacy Baja Forester Genuine OEM

#9

9. NGK LKAR7BIX-11S

• Weight: 6.4 oz
• Core Material: Iridium
• Top Material Type: Metal
• Compatible with Vehicle Type: Car, Truck

Best for: Iridium IX feature-focused buyers.

Why it ranks #9: The NGK Iridium IX four-pack lists a 0.6-millimeter gap and M12 x 1.25 thread, but the supplied data does not specify Impreza fitment.

A 0.6 mm laser-welded fine iridium tip is the central feature of NGK’s Iridium IX four-pack, with the product description linking it to durability and a stable spark. The fine tip and tapered ground electrode give performance-oriented buyers named ignition-design details to consider.

NGK says the tapered ground electrode minimizes electrical quenching, while the longer insulator nose helps prevent fouling; those details frame the plug’s ignition and maintenance aims. Corrugated insulator ribs are described as preventing flashover, and a triple gasket seal is also specified. The four-plug pack has an M12 x 1.25 thread and 0.6 mm gap. However, the supplied product information does not list a Subaru Impreza year or engine application, so it cannot establish fitment for this roundup’s target car.

Skip it if you need confirmed Impreza year-and-engine coverage; Sixity Auto’s NGK Iridium IX listing names 2012–2016 2.0L H4 models.

Consider this NGK set only when its stated M12 x 1.25 thread and 0.6 mm gap suit the vehicle you are servicing. The supplied details explain its electrode features but do not identify an Impreza application.

Listed on Amazon as: NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix), 4 Pack

#10

10. OVERSTOCKDIRECT NGK Laser Iridium

• Weight: 6.4 oz
• Core Material: Iridium Alloy
• Top Material Type: Ceramic
• Compatible with Vehicle Type: Car, Sport Utility Vehicle

Best for: High-ignitability OE-style plug buyers.

Why it ranks #10: This NGK four-pack is described for selected Subaru 2.4L H4 vehicles, including Ascent applications, not Impreza fitment.

NGK’s high-ignitability design, combining an SPE tip with an iridium-alloy center electrode, is the defining feature of this four-pack. The supplied application details name selected Subaru 2.4L H4 vehicles, including the Ascent, giving buyers a specific OE-style replacement target rather than broad Impreza coverage.

The product description recommends high-ignitability plugs for vehicles whose original equipment uses SPE iridium-alloy plugs, connecting the electrode design to replacement selection. Its listed 12 mm thread and 0.6 mm gap provide specifications for checking the plug against the vehicle’s requirements. The application details name 2019 and 2020 Subaru Ascent 2.4L H4 models, but do not establish Impreza fitment. Buyers should treat the supplied application list as narrow, not as a general Subaru compatibility claim.

Skip it if you need a plug explicitly listed for an Impreza; Sixity Auto’s NGK Iridium IX set names 2012–2016 2.0L H4 models.

This set is relevant to buyers seeking the stated high-ignitability design for a vehicle whose OE plug uses SPE iridium alloy. The supplied Subaru application details name Ascent models, so they do not establish Impreza compatibility.

Listed on Amazon as: OVERSTOCKDIRECT NGK Laser Iridium High Ignitability Spark Plugs 4 Pack