Four Wheel Logic

Do You Disconnect Battery When Changing Spark Plugs? | Safe?

Most cars don’t require it, yet disconnecting the negative cable lowers short-circuit risk while you work near coils and wiring. Spark plugs are simple parts with a not-so-simple neighborhood. On many engines, you’re working inches from coil connectors, sensor plugs, and metal brackets that love to catch a ratchet extension. That’s why the battery question

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