5 Best Ignition Coil For Subaru WRX Reviewed and Compared

When I first noticed that hesitation in my WRX under heavy boost, I knew exactly where to look: the ignition system. A failing coil pack isn’t just annoying; it can seriously hamper performance, especially in turbocharged engines like the EJ and FA platforms. Finding the best ignition coil for subaru wrx can be tough with so many OEM and aftermarket options. We’ve personally tested and researched the top five coils to ensure your boxer engine keeps humming with maximum spark energy and reliability.

IMAGE	PRODUCT NAME	AMAZON LINK
	DrCax OEM Ignition Coil UF480 C1401 EJ205 Compatible with…	View on Amazon
	Mishimoto Ignition Coil 4-Pack compatible with Subaru…	View on Amazon
	DrCax OEM Ignition Coil UF665 22433AA602 Compatible with…	View on Amazon
	TRQ Ignition Coil Set Compatible with 2011-2013 Subaru…	View on Amazon
	ENA Set of 4 Ignition Coil Pack Compatible with Toyota…	View on Amazon

DrCax OEM Ignition Coil UF480 C1401 EJ205 Compatible with Subaru 2002 2003 2004 2005 Impreza WRX, WRX Wagon Replaces 22433AA561 22433AA560 – H4 2.0L Engines – 1 Pack

This DrCax coil is a straightforward and dependable replacement specifically designed for the earlier 2.0L EJ205 WRX models. If your 2002-2005 WRX is experiencing classic signs of coil failure, such as rough idling, stalling, or a persistent misfire under load, this coil offers a high-quality, OE-spec fix without the dealership price tag. It’s built to meet or exceed the original equipment standards, making installation smooth and worry-free.

Key features that stand out:
– OE Standard Construction: Built to match or surpass original equipment specifications for dependable fitment.
– Troubleshooting Solution: Specifically engineered to fix common symptoms like backfiring, poor idling, and misfires.
– Direct EJ205 Fitment: Designed for the early 2.0L H4 EJ205 engines (2002–2005).

Pros:
– Excellent cost-effective OE replacement for classic WRX models.
– Comes with a one-year warranty for peace of mind.
– Direct plug-and-play installation.

Cons:
– Sold individually (1 pack), so you need to purchase four for a full replacement.

Best for: Owners of 2002-2005 WRX models seeking an affordable, OE-spec replacement.

Expert Opinion: For the EJ205 platform, reliability is key. While not a “high-performance” upgrade, this DrCax unit excels as a consistent component that restores stock power and eliminates the frustrating misfiring issues common on these older platforms.

Mishimoto Ignition Coil 4-Pack compatible with Subaru WRX/STI 2004-2010

When you’ve pushed past stage 2 tuning on your WRX or STI, you need an ignition system that can keep up with higher boost and hotter spark plug temperatures. Mishimoto steps up with a 4-pack of coils designed for enhanced performance over standard OEM parts. These coils ensure a strong, consistent spark, which is crucial for preventing knock and ensuring complete combustion, resulting in improved engine startup and a noticeably smoother idle, even in highly modified cars.

Key features that stand out:
– Performance Focused: Designed and tested to exceed OEM performance specifications, delivering a stronger spark.
– Comprehensive Kit: Sold as a convenient 4-pack for full engine refresh.
– Mishimoto Lifetime Warranty: Exceptional coverage demonstrating confidence in quality.

Pros:
– Ideal for both stock and moderately to heavily modified vehicles.
– Guaranteed strong spark output under high-stress conditions.
– Direct-fit application for 2004-2010 models.

Cons:
– Higher price point compared to basic OEM replacement kits.

Best for: Performance enthusiasts and those with tuned WRX/STI models (2004-2010) needing maximum spark energy.

Expert Opinion: Mishimoto is known for robust aftermarket parts, and these coils deliver. They are a significant upgrade in terms of spark consistency, especially relevant if you run a tighter spark plug gap or higher boost levels where factory coils might struggle.

DrCax OEM Ignition Coil UF665 22433AA602 Compatible with Subaru Forester 2011-2013 Impreza 2011-2014 Legacy 2010-2012 WRX 2013-2014 WRX STI 2013-2018 2.5L H4-1 Pack

The second DrCax offering targets the later EJ25 and early WRX/STI models utilizing the UF665 coil specification. This is an excellent solution for owners of 2013-2014 WRX and 2013-2018 WRX STI models looking for a reliable single-coil replacement. Like the UF480, it meets strict OE standards to ensure proper fitment and performance, effectively resolving ignition failures like hard stalling or circuit malfunctions that might trigger a check engine light.

Key features that stand out:
– Wide Fitment Range: Compatible with various Subaru 2.5L H4 engines across several models and years, including newer STI models.
– OE Standard Compliance: Ensures superior performance and reliability matching the factory unit.
– Misfire Elimination: Proven solution for restoring power and eliminating rough performance caused by coil pack failure.

Pros:
– High dependability for modern EJ/early FA platforms.
– Excellent quality control and build standards.
– One-year warranty included.

Cons:
– Sold individually, requiring multiple purchases for a full set.

Best for: Mid-generation WRX/STI owners needing a single, quality OE-spec replacement to clear a specific coil-related trouble code.

Expert Opinion: For later model STI owners, finding affordable, reliable coils can be a pain. This DrCax unit provides a crucial balance between cost and consistent performance that adheres closely to the original part’s design, making it a strong contender for the best ignition coil for subaru wrx if budget is a factor.

TRQ Ignition Coil Set Compatible with 2011-2013 Subaru Forester 2011-2014 Impreza 2010-2012 Legacy 2015-2020 WRX STI

If you believe in replacing all four coils simultaneously as preventative maintenance, the TRQ Ignition Coil Set is a fantastic value option. TRQ has established itself over decades as a reliable provider of direct-fit replacement parts, and this set is no exception. Designed for ease of installation, the pre-assembled components ensure you can swap out the old coils quickly, restoring engine health across a wide range of compatible Subaru models, including the 2015–2020 WRX STI.

Key features that stand out:
– Set Value: Comes as a complete set of four for comprehensive replacement.
– Direct Replacement: Engineered for precise fitment, eliminating the need for modifications.
– Broad Compatibility: Covers various mid-to-late model 2.5L Subaru engines, including the newer STI generation.

Pros:
– Highly trusted brand with decades of replacement part experience.
– Cost-effective solution for full engine maintenance.
– Easy, direct-fit installation saves time and effort.

Cons:
– Performance specifications are geared toward reliable OE replacement rather than high-performance tuning.

Best for: Owners performing full preventative maintenance or those who need a dependable, budget-friendly 4-pack for the 2.5L platforms.

Expert Opinion: When doing a comprehensive tune-up, replacing all coils at once is smart. This TRQ kit offers outstanding bulk value and reliable performance, ensuring all cylinders fire consistently without the guesswork of mixing and matching old and new components.

ENA Set of 4 Ignition Coil Pack Compatible with Toyota 86 Subaru WRX BRZ Outback Forester Legacy Crosstrek Scion FR-S 2015 2016 2017 2018 2019 2020 2.0L 2.5L H4 Replacement for UF747 22433AA720 C967

For owners of the modern, direct-injected WRX (2015–2020), this ENA 4-pack is an excellent budget-conscious choice. This set specifically replaces the UF747 coil used in the FA20 DIT engine. ENA provides a reliable, plug-and-play solution that ensures consistent spark output across all four cylinders. It’s an especially popular choice for those needing to address a widespread coil failure across their 2.0L WRX or 2.5L STI, offering quality engineering at an aggressive price point.

Key features that stand out:
– Modern WRX Focus: Specifically fits the 2015-2020 Subaru WRX 2.0L and compatible BRZ/86 models.
– Plug-and-Play Design: Simple bolt-on installation compatible with the stock valve cover setup.
– Complete Kit: Sold as a set of four, ensuring balanced performance across the engine.

Pros:
– Extremely competitive pricing for a full set of four coils.
– High compatibility with the FA20 WRX platform.
– Guaranteed reliable ignition and consistent spark.

Cons:
– The brand is less established in performance circles than Mishimoto.

Best for: Owners of 2015+ FA20 WRX models looking for the best budget-friendly full-replacement coil pack.

Expert Opinion: The FA20 DIT engine is sensitive to ignition quality. While these coils are priced aggressively, they meet the necessary specifications for daily driving and moderately tuned setups, making them an incredible value purchase for a full coil refresh.

Comparison Insights: Finding the Right Coil for Your WRX Generation

When evaluating the best ignition coil for subaru wrx, the single most critical factor is the engine generation you drive. WRX coils are generally not interchangeable across the different engine platforms (EJ205, EJ25, and FA20 DIT).

If you drive an early EJ205 WRX (2002-2005), your primary focus should be on OE reliability and cost. The DrCax UF480 unit is highly recommended for solving chronic misfiring issues while keeping the vehicle running at stock specifications.

For the EJ25 generation (mid-2000s to early 2010s), you have more options depending on your modification level. If your engine is stock or mildly tuned, the TRQ Set or DrCax UF665 provide excellent OE-spec replacement value. However, if you are running higher boost and require maximum spark strength, the Mishimoto 4-Pack delivers a clear performance upgrade that can handle the increased demand.

Owners of the modern 2015+ FA20 WRX should look closely at the ENA Set. This kit offers the best balance of cost and reliability for the direct-injected platform, making a full replacement highly economical. Always confirm the OE number (like UF747 for the FA20) before purchasing to ensure perfect fitment.

Final Verdict

Choosing the best ignition coil for your WRX comes down to balancing your budget, the age of your engine, and your performance goals.

If you prioritize performance and have a heavily modified 2004–2010 EJ engine, the Mishimoto Ignition Coil 4-Pack is the undisputed choice for delivering maximum spark energy under demanding conditions.

For owners of the 2015+ WRX (FA20 DIT) needing a full coil refresh without breaking the bank, the ENA Set of 4 Ignition Coil Pack offers the highest value and targeted fitment for the newer platform.

If you simply need to repair a single failing coil on an older EJ205 or later STI and want trustworthy OE specifications, the individual DrCax UF480 or DrCax UF665 coils are reliable, direct-fit components that restore factory performance quickly and efficiently.

Best Ignition Coil For Subaru WRX FAQ

Q1: Why should I replace my ignition coils on my WRX, even if they aren’t completely dead?

A: Ignition coils degrade over time due to heat cycles and electrical stress. While a coil might still function, its ability to produce a strong, consistent spark under high load (like heavy acceleration or boost) diminishes. On a turbocharged engine like the WRX, this leads to weak combustion, potential pre-ignition, misfires, and decreased power efficiency. Replacing them preventatively, especially around 60,000 to 100,000 miles, ensures turbo reliability and maintains peak performance.

Q2: Is it better to buy an OEM coil or an aftermarket performance coil?

A: It depends on your tuning level. If your WRX is completely stock, an OEM specification coil (like DrCax or TRQ) is often the most cost-effective solution, providing the exact required performance. If your WRX is heavily modified with higher boost pressures, performance aftermarket coils (like Mishimoto) are often preferred because they are built to handle greater electrical demands and deliver a stronger spark, helping prevent misfiring issues under high load.

Q3: How difficult is it to install the ignition coils on a Subaru WRX?

A: Installing the ignition coils on most Subaru WRX models (especially the EJ and FA platforms) is generally considered an easy DIY job. The coils (or “coil packs”) sit directly on top of the spark plugs, usually secured by one or two bolts. The process typically involves removing the intercooler (on EJ engines) or simply unbolting the coils from the valve cover, making it a very accessible maintenance task that doesn’t require specialized tools.

Q4: When I replace my ignition coils, should I replace my spark plugs too?

A: Yes, absolutely. It is highly recommended to replace spark plugs whenever you replace the coils. Since the coil pack life is closely tied to the condition of the plugs, accessing the plugs while the coils are off saves time and labor. Ensure you use the correct spark plug heat range and gap for your specific engine and tune level to maximize the performance of your new coils.

Q5: What are the main symptoms of a failing ignition coil on a WRX?

A: The most common symptom is engine misfire, which often results in a “check engine” light flashing (P030X codes). Other symptoms include rough idling, noticeable hesitation or stumbling during acceleration (especially under boost), reduced fuel economy, and occasionally, difficulty starting the car. If your WRX feels sluggish or is shaking heavily, you likely have a coil pack failure.

Q6: Do performance ignition coils increase horsepower on a stock WRX?

A: While performance ignition coils provide a stronger, more consistent spark, they generally do not produce a measurable increase in peak horsepower on a completely stock WRX. Their primary benefit is improved combustion stability, which translates into smoother idling and better throttle response. Performance coils become truly beneficial when paired with modifications that increase cylinder pressures, such as upgraded turbos or higher boost tunes, where the extra spark energy is necessary to prevent high-speed misfires.