Spark plug symbol codes

Denso Symbol Code

It is possible, with care, to decode the construction of Denso sparkplugs. This can help in identifying suitable replacement parts from Denso or even equivalent from other manufacturers. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode.

Below is Denso's spark plug part number decode. This applies to standard copper, platinum and Iridium power plugs. If you find it difficult to read, click on the code to open in a larger window. You may need to click again to zoom in depending on your web browser.

Denso spark plugs symbol code

NGK Symbol Code

It is possible, with care, to decode the construction of NGK spark plugs. This can help in identifying suitable replacement parts from NGK or even equivalent from other manufacturers. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. Below is NGK's spark plug part number decode. This applies to standard copper and platinum plugs. There are additional decodes available for NGK US specification plugs.

NGK spark plug symbol codes

Champion Symbol Code

It is possible, with care, to decode the construction of Champion sparkplugs. This can help in identifying suitable replacement parts from Champion or even equivalent from other manufacturers. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. Below is Champion's spark plug part number decode. This applies to standard copper and platinum plugs. If you find it difficult to read, click on the code to open in a larger window. You may need to click again to zoom in depending on your web browser.

Champion spark plug symbol code