Fender: The panel of the automobile body mounted above the wheels.

Fastback: A car with the roof sloping smoothly from front to rear.

Fading of brakes: The decrease in the effectiveness of brakes with prolonged application. This is, however, reversible and usual effectiveness is restored when the brakes…

Estate car: A saloon car with the passenger roof extended right upto the rear end and the rear door for loading with rear seats usually…

Ergonomics: Suitability of a vehicle, especially the controls, for human habitation and use.

Electric screw driver: A tool resembling a pistol which can accept screw driver bits of different sizes.

Electronic Control Unit (ECU): A digital computer that controls vehicle system (engine, transmission, brake, etc.) functions based on input received from various sensors.

Dry weight: The weight of a vehicle without any fuel, oil or coolant.

Drive shaft or Propeller shaft: Assembly of a shaft or tube with two universal joints, used to transmit power from the transmission to the drive…

Drive line: The entire system drive shaft including universal joints, slip yokes and flanges between the transmission and axle(s).

Drive-by-wire: Any driving system which is controlled by electronic responses sent to a control module.

Drag link: The member connecting the steering arm to the idler arm of the steering system.

Double declutching: Literally meaning, 'disengaging the clutch two times', the procedure is used in case of gear box without synchroniser, to gear down, i.e., to…

Divided wheel: A wheel constructed in two parts, which when securely fastened together, combine to form a rim having two fixed flanges.

Dive: Nose-down pitching motion of a vehicle. Dive occurs on account of weight transmission from rear to front during braking.