Updated at: 16-07-2022 - By: Lucas

Both Bosch and NGK are major suppliers of spark plugs in today’s automotive market. NGK and Bosch spark plugs both have their advantages and disadvantages, but there are some commonalities between the two.

NGK manufacturer

In 1936, the NGK Company was founded and has been in business ever since. Since 1940, a Japanese manufacturer has manufactured spark plugs for a variety of vehicles, including automobiles, motorbikes, snowmobiles, and more.

In the beginning, NGK was founded on the ideals of quality, customer service, and innovation. As Nippon Gouka Kogyo Ltd., which translates to Japanese Fine Ceramics Industry Association Ltd., the company’s beginnings are in Japan.

When NGK introduced laser welding in 1935, it made it possible to build ceramic spark plugs that were reliable. Since then, NGK’s mission has remained the same: to ensure that every product satisfies the expectations of its clients.

Bosch manufacturer

NGK Vs Bosch Spark Plugs-3

Robert Bosch established the Bosch Group in 1886. Gerlingen, Germany, is the headquarters city. According to 2011 revenue, it was the world’s ninth largest supplier of automobile components.

Some of the world’s top automobile manufacturers, such as BMW, Ford, Toyota, and others, rely on Bosch for original equipment parts. One of the most durable spark plugs on the market is Bosch’s chromium-plated iridium electrode model.

Spark plug manufacturers NGK and Bosch dominate the global market. Both companies offer a wide variety of items that deliver excellent results.

It is possible to distinguish one type of spark plug from another based on its type. Comparing NGK and Bosch spark plugs, both of which go through rigorous quality control procedures during production, will be the focus of this essay.

Differences between NGK and Bosch spark plugs

NGK Vs Bosch Spark Plugs-2

In order to increase ignitability and combustion, Bosch spark plugs have increased thermal transmission between the electrodes and the engine cylinder, resulting in more power and better fuel economy.

However, while the prices of NGK and Bosch spark plugs are nearly same, Bosch’s double electrode technique and high-quality materials give its plugs an advantage in terms of performance and durability over NGK.

The central electrode of Bosch (Super) spark plugs is constructed of copper and covered with a chromium-nickel alloy. As a result, the surface is more resistant to corrosion, heat, and wear, and it also lasts longer.

The central electrode of Bosch’s other spark plugs (Super Plus) is nickel-plated alloy steel. In addition to providing corrosion protection, this combination also enhances plug performance and increases plug lifespan.

Other varieties of Bosch spark plugs (Super Plus 4) have four silver-coated side electrodes. As a result, this boosts performance and spark power by a whopping 60%!

Bosch Platinum plugs include a centre electrode made of platinum, which means they have a substantially longer life expectancy than original plugs, which can last up to 60000 kilometers (37000 miles). Even in extremely low temperatures, these spark plugs are excellent.

Bosch spark plugs not only last a long time but also function very well in chilly temperatures and start reliably at any speed. Their anti-fouling design significantly minimizes current leakage by as much as 50%. ‘

Spark plugs made by NGK are more expensive than those made by Bosch, but the quality of the NGK spark plugs is superior. In cold weather, they’re more effective than other models.

Every product manufactured by the corporation undergoes a rigorous quality control process before it is offered to the public.

In addition, NGK uses cutting-edge technology in the production of its goods to guarantee the highest levels of quality. As a result, some automakers use NGK spark plugs in their vehicles as standard equipment.

Because of their higher ignitability and combustion due to their innovative design, they provide more power while using less fuel. High-quality insulator ceramics are a standout feature of NGK spark plugs.

V Line is the company’s most popular line, notably in Europe. This spark plug collection now includes 45 different designs, including platinum-plated and double-plated versions of the material.

The centre electrode of 22 of the plugs listed above has a V-shaped notch that makes them stand out. Fuel combustion is improved as a result of this cutout.

The electrode of these spark plugs is constructed of copper, which helps dissipate heat more effectively. The V-shaped notch helps to distribute the potential towards the ends of the cylinder.

A unique heat-resistant shell enhances the heat dispersing effect. These plugs are also included in the product nomenclature:

  • With one electrode – best suited for many modern cars;
  • Multi-electrode – they are characterized by increased stability and reliability;
  • NGK iridium spark plugs – the resource of these products is twice as long as conventional ones;
  • NGK LPG LaserLine devices are designed for LPG-powered cars.

Benefits when chosing between Bosch and NGK spark plugs

Most importantly, Bosch Aero Twin Plugs can be installed in any cylinder arrangement. Their power tip electrodes have a wider thermal range, which means they’re more ignitable and have a longer lifespan in harsh environments.

Spiral wound technology developed by Bosch claims to lessen the risk of misfires caused by fouling while increasing engine performance during the life of a spark plug.

NGK Iridium IX, on the other hand, offers remarkable ignitability, even at extremely high speeds. The quad electrode technology also ensures superior fuel economy and more power through increased energy transfer efficiency, making these vehicles even more fuel efficient and powerful.

The longer service life and reduced voltage needs of the iridium center electrode tip make it an excellent choice. Additionally, you may choose from a variety of heat ranges for these spark plugs, making it simple to match them to your engine’s needs.

The double electrode technique used by NGK Spark Plugs, as opposed to the single electrode technology used by Bosch Spark Plugs, results in 25 percent more intense sparks than normal platinum spark plugs.


If you need to change your car’s spark plugs, go no further than NGK. They’re among the best available on the market now in terms of quality. Their spark plugs start better in colder weather, last longer, and offer a higher strength to weight ratio. Spark plugs made by NGK are used by a large number of automobile manufacturers as well.

Furthermore, Bosch has a long life expectancy, great performance in colder weather situations, and a superior design that delivers higher ignitability and combustion, which results in increased power and fuel economy.

Before deciding which manufacturer to go with, you should take into account the price differential. Spark plugs of each brands’ highest grade are priced differently.