Yakima does not have a fit yet for the '07 Dodge Caliber. The best option is to email Yakima and let them know you are interested in their product. They respond better to a customer inquiry than a dealer one. They also do not recommend a trunk rack at this point.

Thule does not have a fit yet either for this vehicle. Saris is showing a fit - both a roof rack and a trunk rack. They don't offer the Bones as an option though - my first recommended choice for a trunk rack.

Hope this helps.