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Meaning of Bosch Spark Plug Model Numbers?

1 Answers

OAddyson

07/29/25 10:35pm

Bosch spark plug letter meanings, Part 1: English letters indicate the structure, type, and main dimensions of the spark plug. Part 2: Arabic numerals indicate the heat value of the spark plug. Part 3: English letters indicate the characteristics of the spark plug. Spark plug replacement interval: Under normal maintenance conditions, replace every 40,000 to 60,000 kilometers, but this may vary depending on the brand and engine. It is recommended to follow the user manual. Effects of a faulty spark plug: If a spark plug is damaged, it can directly cause issues such as leakage in the vehicle's ignition system, increased fuel consumption, and reduced power. The main problem is difficulty in ignition, affecting the normal use of the vehicle. Severe spark plug erosion, blistering at the top, damage, or electrode melting and erosion all indicate that the spark plug is damaged and should be replaced.

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