Spark plugs have been and probably always will be an integral part of your car, so you should consider it an essential (read: necessary) automobile maintenance skill to know how to take out old ones and install new ones.
And no, we promise you won't be lit up like a Christmas tree if you try to do it yourself. Simply check out this auto tutorial to learn how to take 'em out and put in new ones step by step. Make sure to have a cleaning rag on hand because it's going to get dirty.
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