Kia Soul Spark Plug Replacement Guide (2010-2024)
Keep your Soul's engine running strong by choosing the right spark plugs for your specific model year and engine.
- For best results, use OEM-equivalent iridium spark plugs from NGK or Denso, as they are the original suppliers for Kia.
- Check your owner's manual for the correct replacement interval, as it varies from 45,000 to 100,000 miles depending on your engine.
- Symptoms of failure include rough idle, poor acceleration, and a drop in fuel economy, often triggering misfire codes like P0300-P0304.
- Be aware of engine recalls for oil consumption on 2021-2023 models, as this can foul spark plugs and cause misfires.
Understanding Spark Plugs in Your Kia Soul
Your Kia Soul's engine, whether it's the 1.6L or 2.0L, relies on spark plugs to function correctly. Over time, the metal tips (electrodes) on the plugs wear down from creating thousands of sparks per minute. Worn or dirty plugs can't create a strong enough spark, which leads to a variety of engine performance issues. 🎬 Watch: Common symptoms of bad spark plugs to look for. Replacing them at the recommended interval is a key part of routine maintenance.
Key Differences Across Kia Soul Generations
The 2010-2024 Kia Soul has used several different engines, primarily 1.6L and 2.0L four-cylinders, including GDI (Gasoline Direct Injection) and MPI (Multi-Port Injection) versions. It's important to know which engine your Soul has, as the type of spark plug and the replacement schedule can vary. For example, some models with iridium-coated plugs have a replacement interval of up to 100,000 miles, while others may be closer to 45,000 or 60,000 miles. Always check your owner's manual or with a parts professional to confirm the correct part for your specific vehicle.
Known Issues: Engine Recalls and Oil Consumption
While not directly a spark plug failure, some Kia Soul models have been subject to significant engine-related recalls. Notably, certain 2014-2015 models had a recall for issues that could lead to an engine compartment fire. 🎬 See this spark plug replacement walkthrough for 2014-2019 models. Additionally, 2021-2023 models with the 2.0L Nu MPI engine 🎬 Watch: How to change spark plugs on 2019-present Kia Souls. were recalled for defective piston oil rings that could cause increased oil consumption, engine damage, and potential failure. This excessive oil consumption can lead to fouled spark plugs, causing misfires. If you own one of these models, ensure all recall work, including software updates, has been completed by a Kia dealer.
Choosing the Right Aftermarket Spark Plugs
When shopping for new spark plugs, you'll find several brands and types. For the Kia Soul, sticking with the original equipment (OEM) manufacturer's specification is highly recommended for best performance.
- OEM-Equivalent Brands (Recommended): NGK and Denso are the original equipment suppliers for most Kia vehicles. Choosing an iridium plug from one of these brands is the safest bet. Many owners report removing old factory plugs and finding they were NGK. These plugs are designed specifically for your Soul's engine, offering reliable performance and longevity.
- Reputable Aftermarket Brands: Bosch and Champion are well-known brands that produce quality spark plugs. Some owners have used Bosch Iridium plugs with good results over long intervals. These can be a good alternative if OEM brands are not available.
- Budget-Friendly Brands: Autolite and Skyward are generally more budget-focused. While they meet basic requirements, some mechanics and owners prefer to stick with NGK or Denso for modern Asian vehicles to avoid potential compatibility or longevity issues.
Iridium vs. Platinum and Copper
Modern engines like those in the Kia Soul are designed for long-life iridium spark plugs. They last much longer and provide a more consistent spark than older copper or platinum types. While cheaper options exist, using the specified iridium plug helps ensure your engine runs efficiently and avoids premature replacement.
Aftermarket vs. OEM Spark Plug Cost
| Part Type | Price Range (Set of 4) |
|---|---|
| New Aftermarket | $15 - $112 |
| New OEM | $60 - $140 |
| Shop Labor | $100 - $180 |
Frequently Asked Questions
How often should I change my Kia Soul's spark plugs?
The replacement interval varies by model year and engine. It can range from every 45,000 miles to as long as 100,000 miles for plugs with iridium coating. Check your owner's manual for the specific schedule for your vehicle.
Do I need to gap my new spark plugs?
Most modern iridium spark plugs from brands like NGK and Bosch come pre-gapped from the factory for your specific vehicle. Attempting to gap them can damage the fine iridium tip. It's always a good idea to double-check the gap with a feeler gauge, but do not try to adjust it unless absolutely necessary and you have the correct tool.
Can I use a cheaper brand of spark plug?
While you can, it's generally recommended to use OEM-equivalent brands like NGK or Denso for the Kia Soul. These engines can be sensitive, and using the specified plug type helps prevent issues like rough idling or misfires that can sometimes occur with other brands.
Should I replace my ignition coils with my spark plugs?
Ignition coils do not need to be replaced with spark plugs as a routine maintenance item. However, if your vehicle has high mileage (over 100,000 miles) or you are experiencing a misfire, it can be a good preventative measure to replace them at the same time, as a failing coil can cause similar symptoms to a bad plug.
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Technical Specifications
OEM Part Numbers: 18846-10060 18855-10060 18847-11160
Most Kia Soul models from this period use Iridium-type spark plugs. Common gap specifications are 0.040" or 0.044". Always verify the correct part number and gap for your specific year and engine size.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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