A Guide to Spark Plug Replacement for the 2020-2024 Kia Forte5
Keep your Forte5's engine running strong by understanding when and why to replace your spark plugs.
- Worn spark plugs cause poor fuel economy, rough idle, and slow acceleration.
- NGK is the OEM-equivalent brand for Kia, making it a top choice for replacement.
- The 2.0L and 1.6L Turbo engines may use different plugs; verify your engine before buying.
- Replacement is a simple DIY task that can be done in under an hour with basic tools.
Signs It's Time for New Spark Plugs
When spark plugs start to wear out, your Kia Forte5 will give you several warning signs. One of the first things you might notice is a decrease in fuel economy. You may also experience a rough idle, where the engine shakes or sputters when you're stopped. Other common symptoms include slow acceleration, difficulty starting the engine, and the check engine light coming on. In some cases, you might even smell fuel from the exhaust or see black smoke, which can happen when unburned fuel passes through the engine.
🎬 Watch: A visual guide to common bad spark plug symptoms.Choosing the Right Aftermarket Spark Plugs
When shopping for new spark plugs, you'll find several types and brands. For the 2020-2024 Kia Forte5, using a quality Iridium spark plug is highly recommended for its longevity and performance. These plugs often last much longer than older copper or platinum types.
Brand Quality Tiers:
- Top Tier (OEM Equivalent): NGK is a brand frequently used by Kia as the original equipment manufacturer (OEM). Choosing NGK, particularly their Laser Iridium or Iridium IX models, is the closest you can get to the factory part, ensuring excellent fit and performance. They are known for durability and providing a consistent spark.
- High-Quality Alternative: Bosch is a well-respected German brand that produces high-quality Iridium spark plugs. They are a strong competitor to NGK and are often used in European vehicles, but they make excellent plugs for all types of cars. Their Double Iridium plugs are designed for a long service life and efficient ignition.
- Value Tier: Brands like Autolite and the store-brand Skyward offer more budget-friendly options. While they can perform adequately, they may not have the same longevity or precise manufacturing tolerances as top-tier brands. If you choose a value brand, be prepared to replace them more frequently.
Pro Tip: Check Your Engine
The 2020-2024 Kia Forte5 was available with two different engines: a 2.0L and a 1.6L Turbo. These engines may require different spark plugs. Always confirm your vehicle's engine size before purchasing to ensure you get the correct parts.
🎬 See this step-by-step replacement walkthrough for the 2.0L engine.Cost of Replacing Spark Plugs
The cost can vary depending on the parts you choose and whether you do the work yourself. The job is considered DIY-friendly for those with basic tools.
| Item | Cost Range |
|---|---|
| New Aftermarket Spark Plugs (per set of 4) | $38 - $92 |
| New OEM Spark Plugs (per set of 4) | $70 - $110 |
| Shop Labor | $117 - $171 |
| Total Professional Replacement | $219 - $273 |
Frequently Asked Questions
How often should I replace the spark plugs on my Kia Forte5?
For modern Kia vehicles with iridium spark plugs, the replacement interval is typically between 60,000 and 100,000 miles. However, some maintenance schedules suggest checking or replacing them around 60,000 miles. Always check your owner's manual for the specific recommendation for your vehicle.
What is a spark plug "gap" and do I need to set it?
The gap is the small space between the center and side electrodes of the spark plug. The spark has to jump this gap to ignite the fuel. Most aftermarket Iridium and Platinum spark plugs come pre-gapped from the factory for your specific vehicle and should not be adjusted, as you can easily damage the fine tip.
Are there any recalls for Kia Forte5 spark plugs?
There are no specific recalls for spark plugs on the 2020-2024 Kia Forte5. A service action (SA342) was issued for some 2018 Forte models due to potential spark plug cracking, but this does not apply to the 2020-2024 model years. No other spark plug-related recalls were found via NHTSA searches.
Is it hard to replace the spark plugs myself?
For a 4-cylinder engine like the one in the Forte5, replacing spark plugs is a relatively easy job that takes less than an hour for most DIY mechanics. You will need a ratchet, a 10mm socket, a 6-inch extension, and a 5/8-inch spark plug socket. It's important to work on a cold engine and tighten the new plugs to the correct torque to avoid damaging the engine's cylinder head.
🎬 Watch: How to replace spark plugs on a Kia Forte GT.Helpful Videos
Technical Specifications
OEM Part Numbers: 18846-11070 18849-08080 18875-08085
The 2020-2024 Kia Forte5 typically uses Iridium-type spark plugs. The required socket size is 5/8 inch. The spark plug gap is pre-set on most quality aftermarket plugs and should not be adjusted.
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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.
- Kia Forte5: