| A colorless, odorless gas, which is highly poisonous. CO is produced by incomplete combustion. It is absorbed by the bloodstream 400 times faster than oxygen. | |
| A round cast iron housing attached to an axle shaft are spindle, on which the brake shoes press to stop its rotation. | |
| The heat exchanger used in the A/C system, in which low-pressure refrigerant flows and changes state, absorbing heat from the surrounding air. | |
| The electronic computer that controls engine operation. |