It is referred to as the engine or powerplant.
a motor car driver
An automobile, a motor vehicle,
A mechanic, or motor mechanic, or car mechanic.
Call your department of motor vehicles.
garage
a garage obviesly
Garage
Chauffeur
A call to your state Dept. Of Motor Vehicles should answer this question.
Depends on which state you live and what kind of car it is and how old it might be. Call your local motor vehicle office.
A motor car driver.
An automobile is sometimes called a motor car but there is a also a railroad car that is called a motor car.