Ignition Coils

Q: What does an ignition coil do?

Ignition coils provide the spark plug with the high voltage required to generate a spark. The ignition coil is an induction coil that transforms the battery's low voltage to the high voltage that is needed to create an electric spark in the plugs and ignite the petrol. NGK ignition coils are accurately engineered for a precise fit (correct seating), superior vibration resilience, exceptional short-circuit and moisture resistance, and long-lasting durability.

Q: What are the signs of a bad ignition coil?

Symptoms of a bad or failing ignition coil include engine misfiring, rough idle, a reduction in power and even a complete failure to start the vehicle. In such cases, the ‘check engine light’ on the dashboard will be activated.

Q: How many different types of ignition coils are there?

NGK SPARK PLUG offers six different types of ignition coils. These are: Distributor Coils, Block Coils, Block Coils with two high voltage outputs, Pencil Coils with double spark and single spark technology and Coil Systems (also known as ‘rails’).

Q: Does NGK SPARK PLUG make good ignition coils?

Ignition coils are part of the company’s NGK Ignition Parts automotive brand portfolio, meeting the same high standards as all of the other products available from NGK SPARK PLUG. As the world's leading ignition specialist, the company offers an extensive selection of ignition coils to the Aftermarket, which deliver OE equivalent quality as well as the highest durability and operational performance. Almost 400 high performance part numbers are available, covering 92% of vehicles operating in Europe.

The Engine’s Power Plant

Handling high voltage is the task an ignition coil must perform reliably. Weak ignition coils cause engine misfiring and performance problems. This is why NGK SPARK PLUG offers an extensive range of ignition coils. NGK Ignition Coils offer accuracy in engineering for a precise fit and perfect durability.

80 years of experience in ignition technologies

More than 400 part numbers available for all car generations

92% coverage of vehicles in operation in Europe (source: TecDoc)

Installation support code for every engine technology with interactive QR code

Ignition Coil Technologies

The continuous development of an ignition system has advanced over the years. Similarly, the ignition coils that car manufacturers use. In general, there are two fundamental operating principles in ignition coil technology: ‘single spark technology’ and ‘dual spark technology’. With single spark technology, there is an individual coil for each spark plug supplied. With dual spark technology, one coil simultaneously actuates two cylinders.

NGK ignition coils use the technology car manufacturers require
The vacuum moulding process ensures a blister-free encapsulation
Eeach ignition coil is produced in strict compliance with OE specifications

Ignition Coil Requirements

The ignition coil's design and material must be resistant to heat and moisture in the engine bay and function reliably. Oil and petrol vapours mustn’t be able to harm the housing: This damage to the housing would impair the function.