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How to Replace the Ignition Coil in a Saturn Ion

by Contributor

The ignition coil converts the low-voltage power from the battery into the high-voltage spark that triggers the spark plugs. Signs of a damaged ignition coil include oil leaks, failure to start, irregular or fast idle or stalling. All Saturn engines utilize a distributorless ignition system (DIS) to provide the spark that creates air/fuel combustion.

Step 1

Set the emergency brake and disconnect the negative battery cable, which connects to the negative terminal post, from the battery.

Step 2

Take off the air induction resonator.

Step 3

Release the electrical ignition (EI) module harness connector. With a small wrench or a socket set, remove the bolts for the upper and lower EI. Then pull out the EI module.

Step 4

Remove the spark plug wires from the ignition coil tower. To do this, gently pry between the EI module and the black CPA. A flat head screwdriver works great to do this.

Step 5

Rotate the Ion ignition coil as you pull upward to remove the old ignition coil.

Step 6

Install the new Ion ignition coil. You need to ensure the boot makes a proper seal for the ignition coil to work correctly.

Put the parts back in their proper places and attach them. Tighten so the fasteners are snug.


  • The 2.0L engine requires slightly different steps. In models with this engine type, you can work directly on the ignition coils without removing the air induction resonator or the EI module.

Items you will need

  • Wrench
  • Flat head screwdriver
  • Ion ignition coil

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