NGK Ignition Coil vs. Denso – A Real Comparison with Table

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Are you confused about choosing between the NGK ignition coil vs. the Denso ignition coil for your engine? Undoubtedly, this is a tough task to identify the best spark coils between these. As spark plugs or coils play a crucial role in the mechanism of the automotive system, you can’t skip the best. The common but considerable distinction is the durability and mileage expectancy.

NGK provides a shorter lifespan than Denso coils. Where Denso provides the highest performance an average of 50k to 70K miles or more,  NGK is less than half of it. There is also a common difference in the price range. NGK ignition parts are available at a lower price than Denso. To know an in-depth comparison, read this comparison article till the end.

NGK ignition coil Vs Denso In Table

Content of comparisonNGK Ignition CoilDenso Ignition Coil
Manufacturer NGKDenso
Made inGermanyJapan, Indonesia, the USA, and China.
Item weights0.57 Pounds9.9 ounces
Product Dimensions2.63 x 2.63 x 8 inches21.082 L x 8.382 H x 8.382 W (centimeters)
Life expectancyIt delivers on average 30k to 40k miles of trouble-free riding.Up to 50k mileage effortlessly.
Key featuresIt features ASIC chipsets that optimize the highest efficiency and prevent internal parts damage.Features an innovative and advanced magnetic efficiency that creates high voltage faster.
Benefits Impeccable short-circuit, moisture resistance, and auspicious vibration resilience.Easy to install and replace.
OEM VariantsEach and every NGK ignition coil is produced in strict consent with perfect OE specifications and provides the highest efficiency to generate the best possible spark.All the Denso products are of OE Quality to ensure great fit and performance.
Prices Price starts from $20 to $80.The price ranges from $40 to $60.

Related article: Spark Plug vs. Ignition Coil: The Major Differences

NGK Ignition Coil Vs Denso: Major Differences

There is so much confusion and doubt about these two spark coils. Now in this section, you are going to see the fundamental differences between them.


No doubt and confusion about the brand NGK has produced high-quality and durable ignition coils. By applying advanced and innovative technology, they produce spark coils for almost 95% of vehicles. Each and every coil exceeds OE performance to adjust perfectly. Technically, they are made in Germany.

On the other hand, original and genuine Denso coils are made in Japan, Indonesia, China, and the USA. When it comes to quality, service, transparency, and trust, you don’t need to go for others.


Both are incredibly distinct in terms of structure. When looking at the upper point of the Denso’s spark coils, you can see there are primary, secondary wire, and iron core. This allows the boots to secure firmly. But in the NGK spark coils, there are connector and coil cases.

Moreover, the central electrode is larger on the original NGK coils than on Denso. Small electrode threads can cause an issue with sitting well in the cylinder. However, there is a perfect electrode in the NGK that produces proper combustion and ignition.


The design, however, is a great consideration before choosing vital parts of your automobile. Denso features a circuit onto the upper part of the ignition coil to integrate the driving and reduce size. This is why it is easy to install and perfectly attached to the right place.

Counters, the NGK has a precise design. On the top position, there is enough gap thread design for generating the highest combustion. Superior vibration resilience and rare short-circuit resistance make it exceptional.


In general, every ignition coil is made with Varnish and paper-insulated copper core. However, the NGK ignition coil is made of high-quality plastic materials as external parts. The boot protects the spring from harmful objects. A sensational epoxy resin with vacuum-sealed and high-grade thermal plastic for housing makes it durable.

Contrarily, the coil is made with higher-quality copper wires and coatings with an iron core in the center to resist pinholes. The primary and secondary wires surrounded the center. The materials are good enough to last longer and deliver longer service for a long time.

Fuel consumption

In this area, Denso is more satisfied than NGK. Denso is capable of consuming fuel efficiently and keeping away the engine hassle like starting problems.

In contrast, the NGK produces high voltage to spark with a spark plug gap that helps to burn the air-fuel mixture.


They come to serve different types of vehicles. Denso ignition coil is for Toyota, Lexus, Scion, and Pontic. This ignition coil is an incredible option for a smaller size engine and makes the engine work with horsepower.

On the contrary, the NGK ignition coil is the perfect addition for any non-capacitive discharge ignition system. Any sports car lifted vehicle or motorcycle uses this ignition coil to increase speed. It covers almost 92%-95% of vehicle demand in a day.

Life expectancy

OE quality, perfect coil, and high-quality epoxy resin ensure the durability of NGK spark coils. However, riding over rough and tough conditions is easy when your car has NGK. They provide standard service for a long time. It provides 25k to 30k miles of effortless riding.

Counters, Denso delivers more mileage than its counterpart. It provides 50k to 70k miles effortlessly.


Both provide optimum performance in different ways. The electromagnetic interface and block ignition coil have multiple ignition coils. It effortlessly turns the low-voltage into high-voltage. Single spark technology and duplet spark technology simultaneously arouse two-cylinder for better performance.

Denso combines advanced design with upgradable materials, which ensures dynamic performance and efficiency. By doing this, it extends the higher voltage.

NGK Spark Coils – Best Overall

NGK internal parts like the ignition coil are called the engine’s power plant. Sound heart soothing, right? No doubt, these spark coils are specially made for ignition reliability. With rigorous construction and proper insulator copper wire, it is a highly practical ignition coil. Not only this, it is enthusiastic to alter low-voltage into high.

However, it has variable winding and an iron core to store energy in the form of a magnetic field. The OE feature makes it more durable and efficient. Also, original NGK products last longer than the average. Finally, the NGK trusts quality and uses standard central electrodes for better performance.

Denso Ignition Coils – Best for Budget

Denso, however, produces products that speak. What does it mean? It means they produce the perfect OE category ignition coils that require a car. When it comes to reliability, credibility, installation process, and top-notch performance, nothing is better than Denso. However, it offers on average 50k miles or more mileage without any troubles. The price is also not so high. The magnetic field surrounding the primary coil helps to produce more than 200 volts. The secondary coil has almost 100 times more coil than the basic. After the magnetic field declines, it produces at least 20k volts.

Final Verdict

No matter which branded car you ride or how much the price is. If you fail to install better and more efficient ignition coils, there is no value. So make your engine faster and workable by installing the right ignition coil. Both NGK and Denso ignition coils are better when it comes to performance. They both help to keep the engine workable. However, there are still some differences between the NGK ignition coil and Denso.

Hopefully, you understand which would be the perfect choice for you. If you want a high-quality ignition coil at a low budget, go for the Denso. But if you want high-quality and upgraded coils, you can go for the NGK.

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