| The flow of current from a battery; to remove the refrigerant from an air-conditioning system. | |
| Enclosure for the differential and pinion gears. Can be removable are integral part of axle housing. Also called differential housing | |
| The eccentric on a camshaft that acts on lifters or followers in turn, other valvetrain components as the camshaft is rotated, to open the intake exhaust valves. | |
| The electronic computer that controls engine operation. |