Do all 4 ignition coils need to be replaced when one fails?

1 Answers
SanLouis
07/30/25 9:49am
It is not necessary to replace all 4 ignition coils when one fails. Here is an introduction to automotive ignition coils: 1. Precautions: Avoid exposing the ignition coil to moisture or excessive heat. Do not turn on the ignition switch when the engine is not running. Regularly inspect and clean the ignition coil to prevent short circuits. There is no fixed replacement interval for ignition coils - they don't need replacement as long as they function properly, with a typical service life exceeding 100,000 kilometers. 2. Working principle: The automotive ignition coil (commonly called "high voltage pack") is one of the core components in gasoline engine ignition systems. To ignite the air-fuel mixture in engine cylinders, ignition energy is required, and the ignition coil serves as the medium to provide this energy, ultimately delivering the spark through the spark plug.
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