Replaced all four engine coils and the spark plugs (the plugs i'd expect--it was very close to my 60k check up--where i would have done it anyway) i was not sure which category this part is in. .when i stopped at a stop sign the car started shaking-wildly.--and the check engine light went on. i had no choice but to keep moving when the light turned green-i was on a busy street--it was a little better when moving but when stopped it was a violent shake. given the nature of the engine light-it was a solid--i believed i could keep driving since i wasn't far from a kia dealer. when i pulled in the service writer knew exactly what was wrong before using the computer because it is so common a repair on my vehicle--yet it is not a recalled item despite the dealership telling me it seems to happen on this model. ff this is so common a kia dealer tells you they have to fix it on all cars like yours why hasn't there been a recall. kia has to know this is an issue $600 later i was on my way.