How Often Should the Ignition Coil and Spark Plugs of a Car Be Replaced?

1 Answers
SanMiguel
07/30/25 6:07am
Engine ignition coils should be replaced approximately every 100,000 kilometers, while spark plugs should be replaced every 40,000 to 60,000 kilometers under normal maintenance conditions. The ignition coil is located in the upper part of the spark plug within the engine compartment and is directly connected to the spark plug. Symptoms of aging engine ignition coils include: glue overflow, cracking, connection pipe issues, and high-voltage nozzle erosion. Daily precautions for engine ignition coils include: preventing the ignition coil from overheating or getting damp; turning off the ignition switch when the engine is not running; and checking, cleaning, and tightening wire connections to avoid short circuits or grounding. Damaged spark plugs may lead to the following issues: difficulty starting the engine, reduced power, excessive exhaust emissions, and increased fuel consumption. Spark plug replacement intervals: Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is recommended to follow the user manual. Refer to the following standards for maintenance and replacement: Platinum spark plugs should be replaced every 40,000 kilometers, standard nickel alloy spark plugs every 20,000 kilometers, and iridium spark plugs every 60,000 to 80,000 kilometers.
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