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Making the world better, one answer at a time. Coil springs typically last up to twenty five years. In fact, they are known to outlive the life of an average car. Coil springs typically last up to twenty five years. In fact, they are known to outlive the life of an average car.
If a coil goes bad on an old car, it won't run. So you replace the coil, which is usually pretty cheap, and you're on your way. On a newer vehicle, you have 4,6,8 (or 10 or 12) coils to contend with, increasing complexity. I suppose it allows the computer better control, and more energy makes it to the plug. And no plug wires to go bad. I suppose it just isn't cheap owning a car no matter what you have.