What is the difference between a bumper-to-bumper warranty and a powertrain warranty?

A bumper-to-bumper warranty (often called a basic or limited warranty) covers most of the vehicle's parts against defects, while a powertrain warranty covers only the parts that make the car move, such as the engine, transmission and drive axles. Powertrain coverage usually lasts longer in years and miles. Bumper-to-bumper coverage typically excludes wear items like tires, brake pads and wiper blades. Exact terms vary by manufacturer, so read the warranty booklet or the brand's website for the specific model year.