Advancements have greatly reduced the need for ignition system service. Where distributor caps and rotors once needed replacement, electronic ignitions typically keep on firing. In new vehicles ...

This type of ignition system with a separate ignition coil -- a rotor in a distributor that sends electrical current to each spark plug through wires in the cap -- began to phase out in the 1970s.

"Discovering and acting on this issue quickly is an example of the new norm for product ... is unrelated to the ignition system used in Chevrolet Cobalts and other small cars included in the ...