Best Spark Plugs for Hyundai Elantra [2024 Review]

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Are you unsure whether you should choose the same spark plugs as the previous one or go for a more durable one? This guide discusses everything you need to know about the best spark plugs for Hyundai Elantra and their key features in coherence.

The Best Spark Plugs for Hyundai Elantra Reviewed

Before making your purchase, make sure the spark plug you are seeking fits the suitable model of your Hyundai vehicle. For example, the Elantra model has its defined specs, including a fixed value of maximum torque and power.

However, there are also a few spark plugs that fit all the range of the Hyundai model. Suppose you have any difficulty in finding the correct spark plug for you. You can always go with the ones that serve all ranges of the Hyundai model.

NGK (2667-4PK) Iridium IX Spark Plug

The deal sealing spark plug that uplifts the driving experience and smooth functions with Hyundai Elantra’s engine is none other than NGK Iridium IX Spark Plug. The NGK spark plugs offer everything that one can look for in a spark plug. 

The spark plugs are highly ignitable, give excellent vehicle responsiveness, guard their coating to avoid any delay in the quick start, and facilitate swift acceleration. The manufacturers have carefully manufactured an impressive spark plug with a lot to offer if we talk about its design. 

This spark plug has a 0.6mm sharp tip made with a laser welding technique. Since the tip, if finely welded, ensures proper spark throughout its service period. 

The design of the tip also ensures its high strength that lasts long throughout many years. In addition, the tapering in the base electrode of the spark plug cancels the quenching of electrical discharge that could have hampered if the situation was otherwise.

The NGK Iridium IX Spark Plug has a long ceramic insulator with ribs that prevent discharge while you contact its body. Even to ensure the proper function of the spark plug, a gasket seat is welded on its shell to avoid any combustion leakage.

NGK has given full attention to the buyer’s needs. The heat range of the spark range is broad and offers high dissipation of heat. The plug’s copper core helps generate excess heat to yield optimum output, while the iridium alloy reduces electrical wear because of its high melting point.

The bunch of NGK Iridium IX spark plugs comes with a one-year warranty and guarantees anti-corrosive facilities.


  • The spark is highly durable and offers long shelf life.
  • It avoids fouling and stays intact.
  • The copper core ensures high heat dissipation.
  • The spark plug is anti-corrosive.


  • The NGK Iridium IX Spark Plug is a little pricey for its promised perks.

DENSO #4503 PLATINUM TT Spark Plugs

If you want to upgrade your spark plug from a platinum spark plug to something even better, then DENSO #4503 PLATINUM TT Spark Plugs has something for you.

The DENSO spark plug provides high-tech features in platinum cum titanium structure. Unlike an ordinary platinum spark plug with platinum as its central electrode, DENSO spark plugs have a 1.1mm thick platinum on its central electrode.

Meanwhile, the ground electrode is infused with a titanium alloy to boost its durability and minimize erosion on the tip.

If you are dealing with low fuel efficiency in your Hyundai Elantra, then it’s high time that you go for DENSO Platinum TT spark plugs this time. The double tip structure of this spark plug not only protects itself from metallic erosion but corrosion too. The design of its electrode minimizes fuel wastage and prevents electrical quenching.

Its high-tech design facilitates a consistent gap between the central and ground electrode while maintaining its excellent performance. The DENSO spark plugs come with a one-year warranty period. 


  • The DENSO spark plugs are highly durable.
  • Its high-tech tip design minimizes erosion of the tip.
  • It facilitates the improved flow of flame.
  • The DENSO spark plugs are affordable.


  • This DENSO spark plug isn’t a good fit for old model vehicles.

Bosch 9619 Double Iridium Spark Plug, Up to 4X Longer Life

If you are looking for the most fuel economy spark plugs with eyes on the price, I recommend trying out the Bosch Automotive Double Iridium Spark Plug. The premium spark plug offers unparalleled ignitability and high performance throughout its lifespan. 

With 360-degree continuous laser welding to fuse the iridium firing pin, the Bosch Double Iridium Spark Plug provides remarkable longevity. The plug, once again, has an ultra-fine wire construction for maximum strength and durability.

The plug’s copper core ground electrode has a wide thermal range, which prevents pre-ignition and fouling. In addition, its tiny wire firing pin reduces the amount of voltage needed while still creating consistent sparks.

The Bosch spark plug has a nickel-plated casing with corrosion-resistant rolling threads and does not require anti-seize. Furthermore, the ribbed insulator design reduces flashover, giving you peace of mind.

Installing and removing the double iridium spark plug is simple. Last but not least, you’ll obtain ideal sparks with no need for adjustment because the plugs don’t need gapping before installation.

Reviewers got noticeable fuel economy gain after installing the spark plug. So, if you’re searching for plugs for gaining fuel efficiency, the Bosch double iridium spark plug won’t disappoint you.


  • Laser welded tapered ground electrode enhances durability
  • Affordable and excellent OE replacement 
  • Significant increase in fuel economy compared to other options.
  • No gapping required
  • No anti-seize required, and corrosion protected


  • It doesn’t last as long as compared to the others.

NGK SILZKR7B11 Laser Iridium Spark Plug

If you desire a spark plug that offers low emission and high ignitability, then NGK Laser Iridium Spark Plug is the match for you. The laser-welded spark plug guarantees super ignitability and higher shelf life with good fuel efficiency and lesser emissions.

NGK is one of the leading brands in the spark plug manufacturing industry. It is possible only because of its promised performance and efficiency.

This spark plug has iridium on its center electrode’s tip laid with laser technology to ensure an efficient and consistent spark in the electrical arc. The platinum disc on the back of the base electrode gives high ignitability and a long service period.

The laser technology sparks the fuel mixture inside the combustion chamber without making many emissions. Moreover, to shield the chamber properly, a triple gasket sealing is laid on the shell to decline the chances of any future leakage.

The threading of this spark plug is that of a cold spark plug that drives excess heat away from the chamber to avoid extra heating. While doing so, the spark plugs optimum performance stays intact, and chances of knocking drop to zero. 


  • The central electrode welded using laser technology boosts its durability.
  • The spark plug imparts high ignitability and a long service period.
  • It has improved heat flow structure.
  • It is easy to install and remove.


  • It is pretty pricey for the promised qualities.

Features to Consider for Buying the Best Spark Plugs for Hyundai Elantra

Not all spark plugs are built the same, as evident by the contrast between our various shortlisted options. Learning about the several factors that influence your experience will ensure you pick the best possible product when buying spark plugs for Hyundai Elantra.

Product Material Gap Heating Range Shape Of Tip
NGK (2667-4PK) Iridium IX Spark Plug  Iridium.031″ (0.8mm)    7Pointed
DENSO #4503 PLATINUM TT Spark PlugsPlatinum.039″(1.0mm)16Pointed
Bosch 9619 Double Iridium Spark PlugDouble Iridium.043″ (1.1mm)6Pointed
NGK SILZKR7B11 Laser Iridium Spark PlugIridium.043″ (1.1mm)7Pointed

#1 Material of the Spark Plug

A crucial thing to consider while purchasing a spark plug is understanding which kind of plug you need. There are numerous types of metals that are employed to manufacture the required spark plug. Though the complete body of most spark plugs is identical, the electrodes are distinct.

The type of metal used to make the spark plug electrode is a major factor that governs the spark plug’s price and performance. The following are the electrodes available for spark plugs.

Spark plug
  1. Copper Electrode: These are the affordable and readily available in the market. The best part of using a copper electrode spark plug is that it goes well with almost all types of engines. However, it doesn’t offer much durability and hence wears off after 20,000 miles of use.
  2. Platinum Electrode: Platinum is a non-corrosive metal with respect to copper. Thus, it lasts way longer than an average copper electrode spark plug. As a result, Denso Spark plugs are one of the best platinum-based spark plugs available in the market.
  3. Double Platinum Electrode: These types of spark plugs are an upgrade to the platinum spark plug that offers better performance and durability.
  4. Iridium Electrode: NGK spark plugs are iridium-based spark plugs. Because of such a premium quality core material lasts longer than platinum spark plugs and offers a smooth drive up to 100,000 miles.

#2 Gap Between the Electrodes

Unfortunately, it is a misconception among people that prying the ground electrode away from the central electrode will make space for a good spark. 

It’s completely false. Every engine has its own needs. Thus, there is no universal measurement for the gap of the spark plugs.

It is valid to some extent that prying the ground electrode away creates a good gap for the spark to happen. But, even then, the gap width varies from one model to the other. For example, some spark plugs may require a 0.55mm gap for efficient functioning, while others may need less.

The best way to check what is the desired value is to refer to the user manual. Once you know how much gap between your electrodes, you can easily pry or bend the ground electrode using a gap tool. There are different gap tools for spark plugs based on their core conductor.

Remember, never pry or bend the ground electrode too much since there’s a chance that you’ll scrape off the ground electrode and break the spark plug.

#3 Cost of the Spark Plug

From a commercial point of view, a buyer is likely to incline toward a product that benefits him at a minimalistic or reasonable cost. Usually, the price range for the spark plugs varies, starting from $2.5 to anywhere $15 at max.

The spark plug’s price directly relates to the conductor’s material, tech-inclusive design, making charges, durability, and efficiency.

A spark plug that costs $3 is supposedly the one that doesn’t offer much durability and wears out quickly. Such spark plugs are good to use in racing cars where they are changed at intervals.

Hyundai Elantra

The most common and affordable spark plugs fall in the range of $6 to $10, making up customer satisfaction. On the other hand, the pricey spark plugs $12-$15 is an iridium one that stays intact for an extended period and comes with many facilities.

#4 Heating Range

The heat range of the spark plug has a direct link to its efficiency. The ceramic coating on the spark plug provides insulation to the central electrode and protects the spark plug from thermal rupture. Moreover, the insulator dimensions have a significant role in controlling the heat flow in the spark plug.

For instance, if the ceramic insulation is less on the spark plug, more heat can regulate inside the chamber, and the tip can store more heat. It is how a hot spark plug works. On the other side, if the insulation on the spark plug is better than the previous case, then the plug will get cooler quickly. Hence, the chamber will conduct more heat away from the spark plug.

Demerits Of Choosing A Differently Insulated Spark Plug

There are both merits and demerits of a hot and cold spark plug. When a spark plug remains hot for a long time, the tip stores more heat leading to the mechanical damage of the spark plug. It is known as knocking.

Meanwhile, if a spark plug is colder than required, electric dirt can coat over the ceramic insulator, leading to energy loss. In this case, the spark plug would consume more voltage than stipulated.

#5 Shape of Electrode Tip

The shape of the tip of the electrode can also affect the performance of a spark plug. A pointed tip discharges more spark than a rounded tip spark plug. It is correlated with corona discharge. 

In corona discharge, the sharp tip discharges more current or spark. It is because the area of the tip is minimized with the discharge strength as constant.

Hence, the effect is more in a sharp pointed tip in comparison to a rounded one. The new age spark plugs have a tapered tip for better efficiency. All of the spark plugs discussed above have pointed tips for maximum discharge.


Buying a spark plug has become a lot easier thanks to the bloom of the online market. Unlike the old days, where you had to go to the store to check the specs personally, today, you can do that with just one click and verify if it is the one for your Hyundai Elantra or not. To make things even easier, you can bookmark this guide for your future reference whenever you have to buy one.