See also:

Engine Exhaust (Carbon Monoxide)
WARNING: Do not drive your vehicle if you smell exhaust gas inside the vehicle: Engine exhaust gas is dangerous. This gas contains carbon monoxide (CO), which is colorless, odorless, and poisonou ...

Specifications
Engine Electrical System *1 ex factory CAUTION. When cleaning the iridium plugs, do not use a wire brush. The fine particulate coating on the iridium alloy and platinum tips could be damaged. ...

Under the Hood
All Mazda5s are powered by a 157-horsepower, 2.5-liter four-cylinder engine that makes 163 pounds-feet of torque. It represents a slight bump in horsepower compared with the outgoing four-cylinder ...