Choosing the right spark plugs for your Subaru Forester can improve fuel efficiency, throttle response, and overall engine performance. This guide highlights five popular options that balance OEM compatibility, longevity, and cost. Each listing includes key features to help you compare at a glance and decide which plug best fits your Forester’s engine year and model.
| Product | Brand | Fitment Highlights |
|---|---|---|
| OEM Genuine NGK Spark Plugs Kit | GENUINE SUBARU | Subaru Legacy/Impreza/Forester setups; Set of 4 |
| NGK Iridium IX Spark Plugs (4 Pack) | Sixity Auto | Subaru Forester 2.5L H4 2011-2018 |
| Genuine Subaru Spark Plugs (22401AA781) | GENUINE SUBARU | Forester 2011-2017 2.5 non turbo; Impreza 2012-2016 2.0/2.5 |
| A-Premium Iridium Platinum Spark Plugs | A-Premium | Forester 2014-2018; WRX 2015-2020; 2.0L |
| 93482 Platinum Iridium Spark Plugs | eosorssa | Forester 2011-2018; Crosstrek/Legacy/Outback variants |
The following selections emphasize compatibility with common Forester engines, including 2.0L and 2.5L H4 configurations, while offering a mix of original-equipment compatibility and high-performance iridium or platinum options. Each product section provides a concise overview to help you compare benefits quickly.
Genuine Subaru OEM Spark Plugs Kit
The OEM kit, labeled as Genuine Subaru Spark Plugs 22401AA310, is designed for a range of non-turbo Subarus including the Forester. This set of four plugs targets high reliability and factory-grade performance for 1990-2004 Legacy, 1993-2004 Impreza, and related 2.2L/2.5L H4 engines. Ideal for owners seeking original equipment replacement to preserve factory ignition characteristics and plug gap consistency.
NGK Iridium IX Spark Plugs (Forester 2.5L)
This 4-pack of NGK Iridium IX plugs is tailored for Forester models with the 2.5L H4 engine spanning 2011-2018. NGK Iridium IX plugs are known for a long service life and consistent performance under modern ignition demands. The set includes authentic NGK parts with packaging and hardware, ensuring straightforward installation and reliable ignition characteristics.
Genuine Subaru Spark Plugs 22401AA781 (4-Pack)
Genuine Subaru 22401AA781 plugs are sold as a four-pack, covering Forester 2011-2017 2.5 non-turbo and 2012-2016 Impreza 2.0 non-turbo. For Forester owners seeking factory-equivalent performance with a single purchase, these plugs deliver consistent heat range, electrode design, and the expected OEM fit for reliable ignition and torque maintenance.
A-Premium Iridium Platinum Spark Plugs
A-Premium combines iridium and platinum features for extended life and efficient ignition. Fitment includes Forester 2014-2018 2.0L and WRX 2015-2020 2.0L turbocharged variants. The listed specifications cover electrode materials, resistance, gap size, and reach, providing a comprehensive option for drivers seeking enhanced durability and consistent spark delivery in modern Subarus.
93482 Platinum Iridium Spark Plugs (eosorssa)
These 93482 plugs by eosorssa target Forester 2011-2018, Crosstrek, Legacy, and Outback models with 2.0L or 2.5L H4 engines. They emphasize high-quality alloy and ceramic materials, offering robust ignition, reduced energy waste, and improved performance consistency across ignition cycles. The package includes four plugs at a competitive price point for replacement timing aligned with typical maintenance cycles.
BDFHYK 93482 Spark Plugs Set
BDFHYK presents a 4-pack of 93482 platinum-iridium plugs designed for multiple Subaru models from 2011-2018 Forester to 2013-2017 Legacy and Outback. The features highlight fast and sensitive ignition with high power delivery, plus OE-level durability and a TS16949-certified manufacturing standard. This option emphasizes performance gains while maintaining reliability across drivers’ maintenance cycles.
Buying Guide: Spark Plugs For Subaru Forester
Key considerations for choosing spark plugs include engine type, ignition system design, and maintenance schedule. Foresters with 2.0L or 2.5L H4 engines generally benefit from iridium or platinum center electrodes for longer life and stable ignition. Original equipment may offer the most seamless fit and combustion characteristics, while high-performance variants can improve throttle response during cold starts and under load.
When evaluating options, consider:
- Compatibility: Verify model year, engine displacement, and turbocharger status; some plugs are tuned for non-turbo engines, others for turbo variants.
- Electrode Material: Iridium and platinum uprate durability and spark longevity; carbon fouling resistance is another factor for urban driving.
- Gap and Reach: Some plugs come pre-gapped; others require adjustment to recommended gaps for your model. Incorrect gaps can impair ignition efficiency.
- Brand and Authenticity: OEM brands guarantee factory specifications, while reputable aftermarket brands offer performance gains and price points.
- Maintenance Interval: Longer-life plugs reduce service frequency but require proper torque and installation to maximize lifespan.
Installation considerations include thermostat behavior, coil compatibility, and correct torque. Some sets pair plugs with ignition coils or wires for a complete ignition system refresh, which can simplify replacement and help ensure reliable starting and smooth idle. Always follow Subaru’s maintenance guidelines or consult a certified technician for complex engine configurations.