You know what people breathe? Oxygen. You know what they exhale? Carbon dioxide. You actually inhale and exhale everything in the air, but these are the important parts. You and trees, working together to keep each other alive.
Speaking of breathing in things you shouldn't, you know what cars exhale? Carbon monoxide and nitric oxide -- two very dangerous things. Breathing these gases will not keep you alive. Cars are not trees.
But cars are not, as we've discovered, evil robot overlords, either. They want you to live! Thus the sensors found in the interior of the Acura RLX that detect the presence of exhaust gases and alert you to the danger. Open all the windows and get thee to a dealership pronto.