Diagnosis was ignition coil pack. Covered under extended warranty.

They also said I have 4 bad plug wires. They quoted me $300 parts and labor for just the 4 wires, not all 12. Have you seen how short that wire is?

Since they are so expensive, you'd think they would last longer than 55k miles. If they did, I could very well see the expense. What exactly is it that they do that is so special that they justify such a high premium?