See also:

Substantially reduced road and wind noise
Many improvements were made to structural rigidity and powertrain NVH performance to provide a quieter, more pleasant ride, including the reduction of high frequency booming noise sometimes heard ...

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. ...

High Levels of Safety
Mazda CX9 is also one of the safest SUVs. Active safety features include a high seating position for great all around visibility, large front and rear ventilated disc brakes (320 mm and 325 mm res ...