Electronic apparatus and software sold as a unit therewith for programming and calibrating vehicle components, namely, speedometers, tire pressure monitoring systems, running lamps, and turn signals; electronic apparatus and software sold as a unit therewith to correct speedometers and gear ratios to accommodate vehicle aftermarket components, namely, tires, wheels, and gears; electronic apparatus and software sold as a unit therewith for recalibrating a tire pressure monitoring system to accommodate vehicle aftermarket components, namely, tires, wheels, and gears; electronic apparatus and software sold as a unit therewith for enabling a temporarily increased engine idle speed for winching; electronic apparatus and software sold as a unit therewith for use in alignment of a vehicle to optimize electronic stability control; electronic apparatus and software sold as a unit therewith for clearing engine codes