Best Spark Plugs For Kia Soul Featuring 7 Quality Options

When my Kia Soul started feeling sluggish on acceleration and my mileage dropped, I knew exactly where to look: the spark plugs. Swapping them out is one of the easiest ways to breathe new life into your engine, but choosing the right set can be confusing given all the options out there. I’ve personally sifted through specifications and real-world performance data to determine the best spark plugs for Kia Soul models across various years, giving you a comprehensive guide to maximizing your car’s efficiency and responsiveness.

IMAGE	PRODUCT NAME	AMAZON LINK
	Genuine OEM Kia (Hyundai) NGK Spark Plugs (Pack of 4)…	View on Amazon
	4 pc Champion Copper Plus Spark Plugs compatible with Kia…	View on Amazon
	Iridium Spark Plugs 4 Pack Compatible with Hyundai Veloster…	View on Amazon
	4 pc NGK V-Power Spark Plugs compatible with Kia Soul…	View on Amazon
	UF651 Ignition Coil & Double Iridium Spark Plug 9723…	View on Amazon
	Autolite Iridium XP Automotive Replacement Spark Plugs,…	View on Amazon
	BDFHYK Coil Pack UF652 and Iridium Spark Plugs 93815…	View on Amazon

Genuine OEM Kia (Hyundai) NGK Spark Plugs (Pack of 4) 18843-10062

If you prefer sticking precisely to what your Kia Soul was built with, these Genuine OEM NGK plugs are the safest bet. They offer guaranteed compatibility and performance, ensuring you maintain the factory standard reliability and longevity. While they might cost a little more upfront than aftermarket options, the peace of mind knowing you’re using the original equipment manufacturer (OEM) part is invaluable, especially for warranty purposes.

Key features that stand out:

• Genuine KIA Part that fits your specific vehicle without guesswork.
• Part Number: 18843-10062 for exact matching to required specs.
• Manufactured to meet specifications for fit, form, and function.

Pros:
– Guaranteed OEM quality and fitment.
– Reliable ignition performance and factory lifespan.
– Ideal for routine maintenance schedules.

Cons:
– You may pay a slight premium compared to equally performing aftermarket alternatives.

Best for: Kia owners prioritizing factory specifications and guaranteed compatibility above all else.

Expert Opinion: Using genuine OEM parts, especially for core ignition components, minimizes the risk of electronic issues or misfires that sometimes occur with non-standard parts, making this the gold standard for maintenance.

4 pc Champion Copper Plus Spark Plugs compatible with Kia Soul 1.6L 2.0L L4 2010-2018

Champion Copper Plus plugs are an excellent, budget-friendly option that brings decades of racing heritage into your Kia Soul. Copper is known for its superior conductivity, providing a strong, reliable spark that helps with cold starts and consistent idling. These plugs are a straightforward, reliable replacement option designed to keep your 1.6L or 2.0L engine running smoothly and efficiently.

Key features that stand out:

• Compatible with a wide range of 2010–2018 Kia Soul 1.6L and 2.0L models.
• Genuine Champion parts built on their legacy of quality ignition components.
• Copper Plus technology offers a strong, dependable initial spark.

Pros:
– Very affordable and easy on the wallet for routine replacement.
– Excellent conductivity provides robust starting power.
– Trustworthy brand with extensive expertise in OE components.

Cons:
– Copper plugs require more frequent replacement than Iridium or Platinum options.

Best for: Cost-conscious owners of early-generation Kia Souls needing a reliable, traditional replacement plug.

Expert Opinion: While copper plugs don’t have the 100,000-mile lifespan of Iridium, their immediate ignition performance is excellent due to copper’s low resistance, offering great value for money if you don’t mind changing them sooner.

Iridium Spark Plugs 4 Pack Compatible with Hyundai Veloster Accent & Kia Soul Rio…

This Iridium spark plug set is designed for drivers who want enhanced efficiency and maximum durability. Featuring a 0.6mm fine-wire Iridium centerwire tip, these plugs are built using advanced laser-welded technology. Iridium is six times harder than platinum, giving it incredibly high durability against heat and electrical wear, making these ideal for modern, high-performance engines like those found in the Kia Soul.

Key features that stand out:

• Exceptional Fuel Efficiency thanks to the fine-wire iridium tip design.
• Premium Iridium Material offers extreme durability to heat and electrical wear.
• Fits 1.6L Naturally Aspirated Kia Soul models from 2012 to 2019.

Pros:
– Maximizes engine fuel efficiency and overall performance.
– Extremely high melting point ensures long-term stability.
– Typically allows for change intervals of 80,000 miles or more.

Cons:
– Initial cost is higher than standard copper or traditional nickel alloy plugs.

Best for: Drivers seeking premium longevity and optimal engine efficiency for newer Kia Soul models.

Expert Opinion: Iridium plugs generate a focused, consistent spark over a longer duration, which translates directly into smoother performance and fewer misfires as the engine ages. This is a solid investment in long-term performance.

4 pc NGK V-Power Spark Plugs compatible with Kia Soul 2.0L L4 2010-2011

NGK is a globally trusted name in ignition, and the V-Power line offers a significant upgrade over standard nickel plugs without the high cost of Iridium. Specifically tailored for earlier 2.0L Kia Souls, the V-Power design utilizes a unique V-groove on the center electrode. This design improves ignitability by directing the spark to the sharpest edge, resulting in a more focused and reliable combustion start.

Key features that stand out:

• NGK V-Power Design improves flame propagation and initial ignitability.
• Genuine NGK Parts ensuring reliable quality and fit.
• Direct Replacement for specific 2010-2011 Kia Soul 2.0L L4 engines.

Pros:
– Offers superior ignitability compared to traditional copper.
– Highly resistant to fouling and corrosion.
– Exceptional value proposition from a leading brand.

Cons:
– This specific package only covers a narrow range of model years and engine types.

Best for: Owners of 2010-2011 2.0L Souls looking for a reliable, brand-name upgrade that enhances ignition stability.

Expert Opinion: The V-Power feature isn’t just marketing; it genuinely aids in starting the combustion process quicker and more completely, which is noticeable in older engines that might otherwise struggle with efficiency.

UF651 Ignition Coil & Double Iridium Spark Plug 9723 Compatible with 2011-2019 Kia Soul Forte Hyundai Tucson Elantra…

This product is an excellent choice if your high-mileage Kia Soul (especially 2.0L models) is showing signs of poor performance, suggesting both the coils and plugs need attention. This kit bundles four high-quality UF651 ignition coils with four NGK Double Iridium spark plugs. The Double Iridium plugs are rated for exceptional longevity (up to 100,000 kilometers), ensuring a complete, long-lasting ignition system overhaul.

Key features that stand out:

• Complete Ignition Overhaul including coils and plugs.
• Double Iridium Spark Plug designed for a working life of 100,000 kilometers.
• High-Quality Coil Construction featuring stainless-steel springs and a ferrite noise suppressor.

Pros:
– Addresses both coil and plug failure symptoms simultaneously.
– Iridium plugs provide a consistent, high-energy spark.
– Greatly improves cold-start performance and engine smoothness.

Cons:
– You must verify the compatibility for your specific year (2-pin or 4-pin) to ensure proper fitment.

Best for: High-mileage 2.0L Kia Soul owners who want to proactively replace their entire ignition system for maximum reliability.

Expert Opinion: Replacing the coils along with the plugs in older vehicles is often highly recommended. A failing coil can stress the new spark plugs, leading to premature wear, so this combined kit is a smart preventative measure.

Autolite Iridium XP Automotive Replacement Spark Plugs, XP6203 (4 Pack)

Autolite Iridium XP plugs stand out for their exceptional durability and incredibly long change intervals, rated up to 100,000 miles. Autolite uses laser-welded technology on a 0.6mm fine-wire Iridium center tip coupled with a platinum-protected ground wire. This combination ensures maximum efficiency and ignitability even under the strenuous demands of modern ignition systems like DIS (Distributorless Ignition Systems) found in the Kia Soul.

Key features that stand out:

• Extended Change Interval engineered to last up to 100,000 miles.
• Platinum Protected Ground Wire maximizes efficiency in all ignition types.
• V-trimmed Ground Electrode for improved, focused ignitability.

Pros:
– Minimal maintenance due to the maximum durability rating.
– Provides consistent, focused ignition for better power.
– Highly trusted brand with a long history in automotive parts.

Cons:
– Requires careful installation to avoid damaging the fine iridium tip during gapping.

Best for: Drivers who want the longest possible lifespan and premium materials, reducing the need for frequent tune-ups.

Expert Opinion: The use of platinum on the ground wire—alongside the iridium center electrode—creates a robust dual-metal system that fights erosion exceptionally well, making this one of the most durable replacement options available for the Kia Soul.

BDFHYK Coil Pack UF652 and Iridium Spark Plugs 93815 Compatible with Hyundai Accent Veloster Kia Rio Soul 1.6L 2.0L L4, Sets of 4

Similar to the previous combined kit, this BDFHYK set offers a full replacement of both ignition coils (UF652) and Iridium spark plugs (93815), specifically targeting 1.6L and 2.0L Kia Soul models from 2012–2019. If you are experiencing engine shaking, slow acceleration, or starting failures after 80,000km, this bundled replacement system is designed to restore your vehicle’s performance, making it feel “as powerful as a new car.”

Key features that stand out:

• Full System Restoration addressing both coils and plugs simultaneously.
• High-Tech Iridium Electrode and unique ceramic insulator for durability.
• Addresses Common High-Mileage Issues like shaking and slow acceleration.

Pros:
– Excellent value for money when replacing both core components.
– Made with high-quality silicon steel and imported rubber for coil longevity.
– Comes with a 12-month warranty for peace of mind.

Cons:
– BDFHYK is a less recognized brand compared to NGK or Champion, though the specs are competitive.

Best for: Value-driven owners of 2012–2019 Kia Souls (1.6L and 2.0L) needing a complete ignition system refresh.

Expert Opinion: For high-mileage Souls, failure often strikes both the plugs and the coils around the same time. Investing in a matched set like this ensures the entire ignition system operates harmoniously, optimizing combustion efficiency immediately.

Helpful Comparison Short Insights

When choosing the best spark plugs for your Kia Soul, consider your model year and priorities. If you own an older model (pre-2012) and prefer frequent, affordable maintenance, the Champion Copper Plus plugs are a dependable workhorse. However, if your budget allows, Iridium is generally the superior metal for modern engines, offering a drastic increase in lifespan and stable performance.

The Genuine OEM Kia NGK plugs are the safest option for maintaining factory standards, perfect if your car is still under warranty. Conversely, if you’re looking to minimize maintenance visits, the Autolite Iridium XP delivers the longest possible change interval—up to 100,000 miles.

For owners tackling poor performance symptoms like misfires or hesitation, the bundled Coil Pack and Iridium Spark Plug kits (UF651/UF652 sets) offer the highest value and quickest path to restoration, as they address potential failures in both system components simultaneously. Always remember to confirm the required gap setting for your specific 1.6L or 2.0L engine before installation.

Final Verdict

Choosing the single “best” plug depends on your maintenance philosophy, but here is a clear three-tiered recommendation for Kia Soul owners:

The Factory Standard (Guaranteed Reliability): Go with the Genuine OEM Kia (Hyundai) NGK Spark Plugs. You cannot go wrong with factory parts for exact fit and consistent performance.

The Longevity Champion (Best Performance/Life Balance): The Autolite Iridium XP plugs are my top pick for most drivers. Their 100,000-mile rating and robust construction mean superior efficiency and minimal required labor over the car’s lifetime.

The All-In-One Fix (High-Mileage Overhaul): If your Soul is showing performance fatigue, choose the UF651 Ignition Coil & Double Iridium Spark Plug 9723 kit. Replacing both the coils and the plugs simultaneously is the most effective way to eliminate performance bottlenecks in older or high-mileage engines.

Best Spark Plugs For Kia Soul FAQ

Q1: What are the main differences between copper, platinum, and iridium spark plugs for my Kia Soul?

A: The primary difference is longevity and price. Copper plugs are the cheapest and have the best conductivity but wear fastest (change every 30k miles). Platinum offers moderate lifespan (60k miles) and improved durability. Iridium plugs are the hardest and most wear-resistant, offering fine-wire tips for focused ignition and an exceptional lifespan of 80k to 100k+ miles, making them the best spark plugs for Kia Soul models seeking long-term efficiency.

Q2: How often should I replace the spark plugs in my Kia Soul?

A: The replacement interval depends heavily on the plug material. If you use standard copper plugs, plan on replacement every 30,000 miles. However, for most modern Kia Souls that came equipped with long-life Iridium or Platinum spark plugs, the factory recommended interval is usually between 80,000 and 100,000 miles. Always check your owner’s manual or the specific plug manufacturer’s guidelines.

Q3: What symptoms indicate that my Kia Soul needs new spark plugs?

A: The most common signs of worn spark plugs include rough idling (the engine shaking noticeably while stopped), difficulty starting, a noticeable drop in gas mileage, and sluggish acceleration. In severe cases, you might also experience engine misfires, which can trigger the “Check Engine Light.”

Q4: Do Kia Soul spark plugs come pre-gapped, and should I check the gap?

A: Most modern iridium and platinum spark plugs for the Kia Soul come pre-gapped, especially the OEM and higher-end aftermarket versions. However, it is always essential to check the gap before installation using a wire gauge to ensure the plug hasn’t been accidentally closed or widened during shipping. The correct gap for the Kia Soul varies slightly by engine (1.6L vs. 2.0L) and year, so reference the factory specifications before installing your new set of best spark plugs for Kia Soul.

Q5: Is it necessary to replace the ignition coils when I replace the spark plugs?

A: It’s not always necessary, especially if your Soul has low mileage. However, if your vehicle is over 80,000 miles, replacing the coils alongside the best spark plugs for Kia Soul is considered excellent preventative maintenance. Coils often wear out around the same time as the plugs and replacing them simultaneously guarantees optimal ignition system performance and reliability, reducing future maintenance needs.

Q6: Can I use different spark plug materials than what came stock?

A: Yes, you can generally upgrade from standard copper or nickel plugs to Iridium plugs, provided they meet the correct heat range and threading specifications for your engine. Iridium is a beneficial upgrade as it offers superior longevity and a more stable spark. However, you should never use a plug that is too long or has an incorrect heat range, as this can damage your engine.