A Dissected Ignition Coil

67Dart273 said
Mechanically / electrically, at least physically, not much to 'em. Frankly, when you add up all the gasoline powered cars and trucks over the years, and the relatively few that has failed, pretty reliable.

That is very true! I have only encountered one leaker, and one with red spark, in my 44 years of experience on my numerous cars and other vehicles.