| The proportion of air to fuel by weight in the mixture drawn into the engine. | |
| The electrical current that passes through the battery to restore it to full power; two full, or bring up to a specific level, A/C system with refrigerant; the required amount of refrigerant for an A/C system. | |
| Constant velocity joint | |
| Gear assembly that transmits power from the driveshaft to the wheels; allows the outside wheel to turn faster than the inside when cornering. |