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The S series Saturns do not use an ignition coil "module", instead, they are all equipped with what is referred to as a "coil pack".

The 4 cylinder engines have 2 coils. In a 4 cylinder engine, 2 of the cylinders reach TDC at the same time, while the other 2 are at the bottom of their stroke. Of the two that are at TDC, one will be at the top of the compression cycle (waiting for the spark from the ignition coil) and the other will be at the top of the exhaust cycle, ready for the beginning of the intake cycle.

In that configuration, it's more economical for the engineers to design the engine with a "coil pack" that is capable of firing 2 sparkplugs, even though one of them isn't really doing anything.

Open the hood and look down behind the radiator on the engine block. You should see two coils where the sparkplug wires are connected; two on each coil.

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