My personal favourite, Derpy Hooves.
Made from the Dundreary Virgo Classic Custom (in-universe 1977-79 Lincoln Continental Mark V), she got this nice grey colour, with some lighter grey linings, yellow roof and interior, the wheels are intended to resemble her bubble cutie mark, and all-round hydraulics, to help bounce out of trouble on the road, primarily kerbs.
And I positioned her in a crash scenario, because it felt in character.