Best Ignition Coil For Ford Focus ST

I remember when my Focus ST started feeling sluggish—a slight hesitation under hard acceleration, maybe a small misfire. If you own an Ecoboost, you know how crucial a strong, consistent spark is for optimal performance. Choosing the best ignition coil for ford focus st isn’t just about replacing a faulty part; it’s about restoring that snappy throttle response and ensuring reliability, especially if you’re running a tune or increasing boost pressure. We’ve reviewed the top replacement options available for the 2.0L Ecoboost engine to help you get your hatch running its best.

IMAGE	PRODUCT NAME	AMAZON LINK
	4PCS ARKAUTO PERFORMANCE IGNITION COIL ARK-IG670-Y UF670…	View on Amazon
	Mishimoto Ignition Coil Compatible With Ford Focus ST…	View on Amazon
	GP POWER Red Ignition Coil Packs UF670 Set of 4…	View on Amazon
	UF670 Ignition Coil Pack 31316353 and Iridium Spark Plugs…	View on Amazon
	N51WSTAR Ignition Coil Packs Set Of 4 Compatible With…	View on Amazon
	Set of 4 UF670 Ignition Coil with Spark Plug Compatible…	View on Amazon
	Set of 4 Ignition Coil Packs Fits for 2.0L L4…	View on Amazon

4PCS ARKAUTO PERFORMANCE IGNITION COIL ARK-IG670-Y UF670 CM5E12A366CA FOR FORD FOCUS ST RS EDGE MUSTANG FUSION TAURUS EXPLORER JAGUAR XF XE DICOVERY LR2 LINCOLN MKC MKT 2.0 2.0T 2.3T

ARKAUTO designed these coils to be direct OE replacements, specifically focusing on vehicles utilizing the 2.0L and 2.3L Ecoboost engines found in the Focus ST/RS. These coils utilize high-grade copper internal components, which is key for efficient energy transfer and sustained performance under demanding conditions. They are rigorously tested to eliminate common issues like misfires and long crank times often associated with aging or lower-quality coils, making them an excellent choice for a reliable refresh.

Key features that stand out:
– High-Grade Copper: Ensures superior conductivity and durability.
– Direct OE Replacement: Designed to seamlessly replace several original Ford and related OE part numbers (CM5Z-12029-A, etc.).
– Wide Ecoboost Compatibility: Supports 2.0L and 2.3L applications across multiple Ford/Lincoln/Jaguar models.

Pros:
– Excellent reliability right out of the box.
– Strong focus on meeting or exceeding OE fitment.
– Cost-effective solution for replacing all four coils.

Cons:
– The extensive compatibility list might be overwhelming for simple Focus ST owners.

Best for: Ford Focus ST owners looking for a highly reliable, copper-wound, OE-spec replacement for daily driving and light modification.

Expert Opinion: These coils provide a robust solution for correcting misfire issues caused by weak factory coils. The use of quality copper is a good indicator of longevity and consistent spark delivery.

Mishimoto Ignition Coil Compatible With Ford Focus ST 2012-2018 / Ford Mustang EcoBoost 2015+, Set of 4

Mishimoto is a well-known name in the performance aftermarket, and their ignition coils are specifically engineered to handle the demands of the turbocharged Ecoboost platform. These aren’t just standard replacements; they are tested to meet or exceed OEM performance specifications, ensuring strong engine startup, stable idle, and peak performance restoration. If you have a mildly modified Focus ST running increased boost, these coils provide the necessary juice for a consistent, strong spark.

Key features that stand out:
– Performance Focused: Engineered specifically for the Ecoboost platform.
– Direct Fitment: Perfect compatibility for 2012-2018 Focus ST models.
– Improved Engine Characteristics: Aids in better cold starts and smoother idle quality.

Pros:
– Trusted performance brand reassurance.
– Proven to handle both stock and modified vehicles efficiently.
– Ensures a strong spark, critical for preventing high-boost misfires.

Cons:
– Often priced slightly higher than generic OE replacements.

Best for: Focus ST owners who prioritize brand recognition and demand coils built to handle mild performance tunes.

Expert Opinion: For enthusiasts who push their cars, the Mishimoto coils offer great reassurance. Their focus on exceeding OEM performance rather than just matching it makes them one of the best ignition coil for ford focus st if reliability under stress is your main concern.

GP POWER Red Ignition Coil Packs UF670 Set of 4 Compatible With Ford Ecosport Edge Explorer Focus RS ST Fusion Mustang Jaguar XE XF XFL F-Pace XJL LR2 Discovery Sport Lincoln MKC MKT MKX 2.0T 2.3T

The GP POWER coils provide an immediate visual upgrade thanks to their striking red housing while maintaining high standards for internal construction. Like many premium options, they utilize high-grade copper to ensure efficient energy transfer. They are designed to be a direct, bolt-in replacement and promise consistent, smooth engine starts right away. The manufacturer stresses reliability and performance, making them a solid alternative to stock coils.

Key features that stand out:
– Visual Appeal: Distinctive red housing adds a subtle visual touch under the hood.
– Latest OE Technology: Utilizes modern components designed to surpass OE requirements.
– Reliability Focus: Engineered to reduce common misfires and poor fuel economy issues.

Pros:
– Quick and easy bolt-in installation.
– Excellent quality copper winding for long life.
– Strong focus on immediate performance improvement (smooth starts).

Cons:
– Color may not appeal to all users preferring a strictly OEM aesthetic.

Best for: Focus ST owners looking for a reliable, high-quality replacement that also adds a subtle pop of color to the engine bay.

Expert Opinion: The performance specifications match the quality expected of an excellent OE-replacement. While the color is subjective, the internals are built correctly to serve the high-demand needs of the Ecoboost engine.

UF670 Ignition Coil Pack 31316353 and Iridium Spark Plugs Set Of 4 Fit For Ford Focus Fusion Explorer Edge Escape Mustang EcoSport Taurus 2012-2020&Land Rover 2012-2017&Lincoln 2013-2020 2.0L 2.3L L4

This package is a fantastic value proposition because it includes not only the UF670 ignition coil packs but also a set of high-quality Iridium spark plugs. Often, when one component fails, the other is nearing the end of its life, especially if the car has over 50,000 miles. By optimizing the product, this supplier has worked to eliminate frequent malfunctions, offering a comprehensive ignition system overhaul in one convenient purchase.

Key features that stand out:
– All-in-One Kit: Includes 4 ignition coils and 4 Iridium spark plugs.
– Iridium Plugs Included: Provides the best plug type for turbocharged performance and longevity.
– Continuous Optimization: Product is designed based on feedback to eliminate common issues.

Pros:
– Exceptional value proposition by including high-quality spark plugs.
– Simplifies maintenance by providing everything needed for a full ignition service.
– Iridium plugs are highly recommended for the Ecoboost engine.

Cons:
– The included plugs may not be pre-gapped specifically for a highly tuned engine.

Best for: Focus ST owners performing a complete ignition system refresh or tackling misfires where both coils and plugs are suspects.

Expert Opinion: Including Iridium plugs is a significant benefit. This kit makes replacing the whole system economical and straightforward, ensuring the coils have the best possible operating conditions right away. This is arguably the best ignition coil for ford focus st package deal on the market.

N51WSTAR Ignition Coil Packs Set Of 4 Compatible With FORD FOCUS ST RS EDGE MUSTANG FUSION TAURUS EXPLORER JAGUAR XF XE LAND ROVER DICOVERY LR2 LINCOLN MKC MKT 2.0 2.0T 2.3T Replacement For UF670

N51WSTAR focuses on providing a durable, high-performance coil built with high-grade copper winding. This set is engineered as a direct replacement for the UF670 OE part number, ensuring simple installation. A major selling point is their emphasis on eliminating common ignition issues, which results in better engine reliability, smoother idle, and improved fuel economy compared to old, failing units.

Key features that stand out:
– High-Grade Materials: Constructed with high-grade copper for reliable spark delivery.
– Issue Reduction: Specifically targets common problems like hard starts, misfires, and premature catalytic converter failure.
– Direct Bolt-in: Simple installation process matching factory location and fitment.

Pros:
– Excellent reliability and high performance.
– One-year warranty and replacement service offered.
– Highly effective at solving age-related misfire issues.

Cons:
– Brand recognition is lower compared to some performance-focused competitors.

Best for: Budget-conscious buyers needing a reliable, proven OE-spec replacement set that offers strong warranty backing.

Expert Opinion: This is a solid, no-frills option. If your goal is simply to restore factory performance and solve persistent misfires without overspending, these are a very dependable choice.

Set of 4 UF670 Ignition Coil with Spark Plug Compatible with 2.0L L4 Ford Edge Escape Explorer Focus Fusion Taurus Mustang Lincoln 2012 2013 2014 2015 2016 2017 2018 2019 Replacement CM5Z12029A DG546

Similar to other comprehensive packages, this kit provides a full set of UF670 coils and accompanying spark plugs for a single, efficient installation. The detailed fitment list confirms compatibility across many Ecoboost models, including the 2013-2017 Focus ST Hatchback. Focusing on OE replacement numbers (CM5Z12029A, UF670), these coils ensure you are getting components designed to match the original factory specifications for voltage and reliability.

Key features that stand out:
– Coil and Plug Combo: Conveniently bundled for full ignition system maintenance.
– Extensive Fitment List: Confirmed fit for many different Focus ST years and trims.
– OE Matched: Designed to directly replace the specified OE part numbers.

Pros:
– Excellent value for a complete ignition system overhaul.
– Reduces the risk of misdiagnosis (by replacing both coils and plugs).
– High factory compatibility ensures easy installation.

Cons:
– Spark plug specifications (material/gapping) are not explicitly detailed.

Best for: Owners seeking maximum convenience and value by replacing all ignition components in one maintenance session.

Expert Opinion: Whenever you service the ignition system on a turbocharged engine, replacing the coils and plugs simultaneously is best practice. This kit provides the necessary parts to do just that affordably.

Set of 4 Ignition Coil Packs Fits for 2.0L L4 Ford Focus Escape Fusion Edge Lincoln MKC MKZ 2.0 2012 2013 2014 2015 2016 2017 2018 2019 OE# C1816 UF670 DG546

LCWRGS claims an enhanced ignition coil design, boasting 15% more energy output than standard OE coils. This increased output is highly beneficial for the Ecoboost engine, especially if factory coils are beginning to fail, leading to reduced efficiency and misfires. They use highly conductive copper wire and high dielectric performance epoxy to ensure excellent connectivity and a long service life, backed by a generous 24-month warranty.

Key features that stand out:
– Enhanced Output: Claims 15% more energy than standard OE coils, boosting performance.
– Superior Materials: Highly conductive copper wire and robust epoxy construction.
– Strong Warranty: Offers a generous 24-month warranty and support service.

Pros:
– Ideal for slightly tuned or heavily driven Focus STs due to higher energy output.
– Two-year warranty provides peace of mind regarding product quality.
– Proven direct OE fitment for easy swap out.

Cons:
– The actual increase in horsepower from 15% more energy is often negligible in stock tunes.

Best for: Focus ST owners who want a slightly stronger spark than stock and prioritize a long, reassuring warranty period.

Expert Opinion: The focus on increased energy output makes these competitive with higher-priced performance coils. For the price point, the enhanced design and 24-month warranty make this one of the top contenders for the best ignition coil for ford focus st value.

Comparison and Buying Insights for Focus ST Coils

Choosing the best ignition coil for your Ford Focus ST depends heavily on your budget and whether your vehicle is stock or tuned.

If you prioritize an all-in-one refresh, look at the bundles from UF670 Ignition Coil Pack and the Set of 4 UF670 Ignition Coil with Spark Plug. These packages offer superior value because they include the critical spark plugs, saving you an extra purchase step and ensuring both components are fresh.

For the enthusiast who frequently drives hard or has light modifications (like a Stage 1 or Stage 2 tune), Mishimoto stands out for owners who prioritize brand recognition and guarantees that meet or exceed specific Ford performance standards. Their reputation in the Ecoboost world is solid.

If you are looking for maximum performance increase claims at a budget price, the LCWRGS Set of 4 Ignition Coil Packs, with its claimed 15% enhanced output and 24-month warranty, is a compelling choice.

The ARKAUTO and N51WSTAR coils represent the strongest traditional OE replacement options—reliable, high-quality copper windings, and designed simply to get your Focus ST back to factory-level performance without fuss.

Final Verdict: Choosing the Right Focus ST Coil

Finding the right balance between performance, reliability, and cost is key when dealing with performance-oriented hot hatches like the Focus ST.

The Overall Best Value:
The UF670 Ignition Coil Pack and Iridium Spark Plugs Set wins for overall value. You get high-quality ignition coils combined with the best type of spark plug for the Ecoboost engine, drastically simplifying maintenance and ensuring peak efficiency right out of the box.

Best for Modified Performance:
If you have pushed your Focus ST past the stock tune, the Mishimoto Ignition Coil provides the confidence and engineering required to handle sustained higher boost levels reliably.

Best Budget OE Replacement:
For reliable, no-nonsense stock replacement, the ARKAUTO PERFORMANCE IGNITION COIL offers exceptional quality materials (high-grade copper) and comprehensive OE matching, providing a durable solution without a premium price tag.

Best Ignition Coil For Ford Focus ST FAQ

What are the signs that my Focus ST ignition coils are failing?

Common symptoms of failing ignition coils in a Ford Focus ST (Ecoboost) include engine misfires (especially under heavy acceleration), poor fuel economy, rough idling, hesitation or stumbling during light throttle application, and the illumination of the Check Engine Light (CEL), often with codes like P0300 through P0304. Replacing your ignition coil pack is often the solution to these issues.

Do I need special ignition coils if my Focus ST is tuned?

If your Focus ST is running an aggressive tune (Stage 2 or above) that significantly increases boost pressure, you should consider coils designed to deliver a stronger, more consistent spark than stock. Brands like Mishimoto or coils claiming enhanced output (like LCWRGS) are often preferred to prevent spark blowout or misfires under high cylinder pressure. However, for mild tunes, a high-quality OE replacement is generally sufficient.

Should I replace my spark plugs at the same time as the ignition coils?

Yes, absolutely. Since the labor required to access both components is the same, it is highly recommended to replace the spark plugs whenever you replace the coils. The Focus ST is notoriously hard on its spark plugs, and replacing both ensures the entire ignition system is refreshed, preventing potential misfires and maximizing performance. Look for kits that include both coils and Iridium spark plugs.

How important is the copper winding in a high-performance ignition coil?

The use of high-grade copper wiring is crucial for efficient energy transfer. Copper offers low resistance, which allows the coil to quickly and effectively step up the voltage needed for a strong spark. For the best ignition coil for ford focus st longevity and reliability, look for manufacturers who explicitly state the use of high-quality copper in their construction.

Are generic UF670 coils safe to use in the Ford Focus ST?

The UF670 is the standardized OE part number for many Ecoboost applications. Generic coils that strictly adhere to the UF670 specifications are generally safe and effective OE replacements. However, for maximum performance and reliability, especially if tuned, it’s worth investing in a higher-quality variant or a known performance brand that ensures they meet or exceed OE voltage requirements.

How often should I inspect or replace my Focus ST ignition coils?

While coils don’t have a defined expiration date like spark plugs, it’s good practice to inspect them during major service intervals (like spark plug changes, typically every 30,000–50,000 miles, or sooner if tuned). A set of coils should generally last 60,000 to 100,000 miles under normal driving conditions. If you experience misfires, replace them immediately.