It's possible the lightning bolt is:
* A custom addition: Someone may have added it as a decal or modification after purchase.
* Part of a special, limited-run package: Perhaps a very small, regional, or dealer-specific package included this symbol that isn't widely known.
* Misinterpretation: You might be misremembering the symbol or its location on the car.
If you can provide more context, like a photo or a more precise description of where the lightning bolt is located (e.g., on the grille, wheel, interior), it might be possible to offer a more informed guess.