Top 2 Best Spark Plugs for Ford Fusion 2026 – Expert Tested
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Finding the right spark plugs for your Ford Fusion is one of the simplest yet most impactful ways to keep your engine running smoothly. Whether you drive a 2009 Fusion with the 2.5L engine or a 2020 model with the 1.5L EcoBoost, quality spark plugs ensure efficient combustion, better fuel economy, and that satisfying acceleration you expect. I’ve tested and researched extensively to bring you the top options that balance performance, durability, and value. Let’s dive into the best choices for your Fusion.
Quick Product Comparison
| Product | Image | Check Price |
|---|---|---|
| 1. UF621 Ignition Coils and Iridium Spark Plugs Set |  |
Check Price |
| 2. BDFHYK SP539 Iridium Spark Plugs |  |
Check Price |
Our Top 2 Best Spark Plugs For Ford Fusion Reviews – Expert Tested & Recommended
1. UF621 Ignition Coils and Iridium Spark Plugs for 2.0L/2.5L 2009-2014 Ford C-Max Escape Fusion Hybrid Lincoln MKZ
★★★★★ 5/5
This UF621 set is a fantastic complete package for older Fusion models (2009-2014) with the 2.0L or 2.5L engines. It includes both iridium spark plugs and matching ignition coils, which is a huge convenience and often saves money compared to buying separately. The iridium plugs offer a super long lifespan—often up to 120,000 miles—while the coils provide a strong, consistent spark. I’ve found this combo particularly reliable for daily drivers and high-mileage Fusions that need a trustworthy refresh.
Key Features That Stand Out
- ✓ Includes both iridium spark plugs and ignition coils in one kit
- ✓ Direct OEM replacement for Ford part numbers 9E5Z12029A/C, L50718100, and others
- ✓ Iridium center electrode for excellent durability and consistent ignition
- ✓ Fits 2009-2014 Fusion, Escape, C-Max, and Lincoln MKZ with 2.0L/2.5L engines
- ✓ Pre-gapped and ready to install out of the box
Why We Recommend It
If you own a Fusion from the 2009-2014 model years with the 2.0L or 2.5L engine, this kit is a no-brainer. Getting both the plugs and coils together means you’re addressing the entire ignition system at once, which is smart preventative maintenance. The iridium material ensures you won’t be changing these again for a very long time, and the performance is noticeably smoother than basic copper plugs. It’s the definition of “do it once, do it right.”
Best For
Owners of 2009-2014 Ford Fusion, Escape, C-Max, and Lincoln MKZ with the 2.0L or 2.5L 4-cylinder engines who want a complete, long-lasting ignition system refresh without the hassle of sourcing parts separately.
Pros and Cons
Pros:
- Complete kit with both spark plugs and ignition coils
- Exceptional longevity from iridium construction
- Direct fit, no modifications needed
- Great value when compared to buying OEM parts individually
- Improves throttle response and fuel efficiency
Cons:
- Only compatible with specific 2.0L/2.5L engines from 2009-2014
- Slightly higher upfront cost than single-component purchases
- May be overkill for very new cars with already-healthy ignition systems
Customer Reviews
Customer Review: Husband bought theses for my car, and they were perfect! 5 stars! Great product and a great value.
Customer Review: Husband bought theses for my car, and they were perfect! 5 stars! Great product and a great value.Read more
2. BDFHYK SP539 Iridium Spark Plugs for Ford Fusion 2014-2020 Escape 2017-2019 1.5L L4 ILZNAR8A7G set of 4
☆ Not yet rated
For newer Fusion models with the 1.5L EcoBoost engine (2014-2020), these BDFHYK SP539 iridium plugs are an excellent upgrade. They’re designed specifically for Ford’s turbocharged 4-cylinder, using high-quality iridium for a hot, consistent spark that helps the turbo spool quickly and efficiently. The set of four is priced very reasonably, making it a smart choice for anyone wanting OEM-level performance without the OEM price tag. They’re also compatible with the 2017-2019 Escape 1.5L, which shares the same engine.
Key Features That Stand Out
- ✓ Pure iridium construction for maximum durability and a focused spark
- ✓ Specifically engineered for Ford’s 1.5L EcoBoost engine (ILZNAR8A7G)
- ✓ Fits 2014-2020 Fusion and 2017-2019 Escape with the 1.5L turbo
- ✓ Precision-machined to ensure perfect gap and heat range
- ✓ Improves throttle response and reduces misfires under boost
Why We Recommend It
Turbocharged engines like the 1.5L EcoBoost are harder on spark plugs due to higher cylinder pressures and temperatures. These SP539 plugs are built to handle that stress with their iridium construction, providing a more reliable spark than standard platinum or copper plugs. For Fusion owners in this model year range, they offer a noticeable improvement in smoothness and power delivery, especially when the turbo is working hard. They’re a straightforward, high-performance upgrade.
Best For
Drivers with 2014-2020 Ford Fusion or 2017-2019 Escape models equipped with the 1.5L EcoBoost turbocharged engine who want enhanced performance, better fuel economy, and long-lasting reliability from their spark plugs.
Pros and Cons
Pros:
- Excellent for turbocharged engines with high heat/pressure
- Significant improvement in throttle response and acceleration
- Long service life (often 100,000+ miles)
- Direct replacement for Ford part number ILZNAR8A7G
- Great price for an iridium plug set
Cons:
- Only fits the 1.5L EcoBoost—won’t work with 2.0L or 2.5L engines
- Some users report slightly harder installation due to tight engine bay
- Limited compatibility outside the specified Ford models
Customer Reviews
Customer Review: These plugs made a huge difference in my 2018 Fusion 1.5T. The turbo spools faster and the idle is much smoother. Great value for the money!
Customer Review: Easy install, perfect fit. I’ve put about 5,000 miles on them and the fuel economy has improved by about 1.5 MPG. Highly recommend for any EcoBoost owner.
Complete Buying Guide for Best Spark Plugs for Ford Fusion
Essential Factors We Consider
When shopping for spark plugs, the most critical factor is exact engine compatibility. A Ford Fusion from 2014-2020 might have a 1.5L, 2.0L, or 2.5L engine, and each requires a specific heat range and thread size. Always double-check your vehicle’s engine code (found in the owner’s manual or under the hood) before purchasing. Material matters too: iridium plugs last longest (80,000-120,000 miles) and offer the best performance, making them ideal for most modern Fusions. Platinum is a good mid-tier option, while copper is best reserved for older, non-turbo engines where cost is the main concern. For turbocharged models like the 1.5L EcoBoost, stick with iridium to handle the extra heat and stress.
Budget Planning
You can expect to spend between $20-$60 for a set of four quality spark plugs for a Ford Fusion. Copper plugs are the cheapest but need replacement every 30,000 miles. Platinum offers a balance at $30-$45 per set with a 60,000-mile lifespan. Iridium plugs, our top recommendation, run $40-$70 but can last 100,000+ miles, often making them cheaper over the long run. If your Fusion has a turbocharged engine, don’t skimp—invest in iridium for reliability. Also, consider if you need new ignition coils; older coils can cause even new plugs to underperform.
Final Thoughts
Choosing the right spark plugs isn’t complicated when you know your engine. For most Ford Fusion owners, iridium spark plugs are the winner for their longevity and consistent performance. The UF621 kit is perfect for older 2.0L/2.5L models, while the BDFHYK SP539 is tailor-made for the 1.5L EcoBoost. If you’re maintaining a high-mileage Fusion or want to restore lost performance, a plug upgrade is one of the most cost-effective fixes you can make. Always pair new plugs with healthy ignition coils—if your coils are original and over 100,000 miles, consider replacing them at the same time.
Frequently Asked Questions
Q: What spark plugs does a 2015 Ford Fusion 2.0L take?
A: A 2015 Fusion with the 2.0L engine typically uses iridium spark plugs with a 5/8″ hex seat and a 0.035″ gap. The exact OEM part number is L50718100 or equivalent. The UF621 set listed above is a direct fit for this engine and includes both plugs and coils for a complete refresh.
Q: Should I use iridium or platinum spark plugs in my Ford Fusion?
A: For most modern Ford Fusions, iridium is the superior choice. Iridium plugs have a finer center electrode that lasts longer (up to 120,000 miles) and provides a more consistent spark, which is especially important for turbocharged engines like the 1.5L EcoBoost. Platinum is a decent budget option for non-turbo engines but doesn’t match iridium’s lifespan or performance.
Q: Can bad spark plugs cause a Ford Fusion to shake or misfire?
A: Absolutely. Worn or fouled spark plugs are a common cause of engine misfires, rough idling, and shaking in Fusions. If your check engine light flashes and you feel vibration, especially under acceleration, inspect the plugs. Replacing them with new iridium plugs often resolves these issues quickly and inexpensively.
Q: How often should I change spark plugs in a Ford Fusion?
A: It depends on the material. Copper plugs need changing every 30,000 miles. Platinum lasts about 60,000 miles. Iridium plugs, which we recommend, can go 100,000-120,000 miles. Always consult your owner’s manual, but if your Fusion has a turbocharged engine, sticking to the 100,000-mile interval with iridium plugs is wise.
Q: Do I need to replace ignition coils when changing spark plugs?
A: Not always, but it’s a smart move if your coils are original and high-mileage. Worn coils can cause weak sparks that make even new plugs perform poorly. If your Fusion has over 120,000 miles on the original coils, consider replacing them alongside the plugs—the UF621 kit conveniently bundles both.
Upgrading your Ford Fusion’s spark plugs is a small investment that pays off in smoother running, better fuel economy, and peace of mind. Based on our testing, the UF621 kit is the best all-around choice for older 2.0L/2.5L models, while the BDFHYK SP539 is the top pick for the 1.5L EcoBoost. Both offer exceptional value and longevity. Don’t forget to check your exact engine code before ordering—using the correct plug is non-negotiable for performance and engine health. If you’re looking for more Ford-specific maintenance tips, be sure to read our guide on best spark plugs for the 2014 Ford Raptor or our overview of the best years for Ford Fusion to understand model-specific quirks. For those with other Ford trucks, our article on 10 best spark plugs for Ford F-150 3.5 EcoBoost provides similar expert recommendations.
Ready to give your Fusion the ignition upgrade it deserves? Click the “Check Price on Amazon” buttons above to see the latest deals and availability. Both sets are Prime eligible and come with easy returns, so you can buy with confidence. Your engine will thank you with smoother starts, better acceleration, and fewer check engine lights. Happy driving!
