The type of vehicle you choose, the coverage you buy, your claims history, your driver category, your use of the vehicle, your place of residence, and the deductible you choose are all taken into account when your insurer sets your premium.
Wavering between a 4 x 4 sport utility and a fully loaded sedan? Although both vehicles cost the same, some models-like four-door sedans-are less of a magnet for thieves. That means they're cheaper to insure.