A quiet and comfortable cabin greets passengers of the Mazda 6 facelift. It inherits extensive sound- absorbing materials, optimized A-pillars, mirror shapes and extremely tight-fitting doors for low wind noise. The original model's sound-optimized centre floor structure is also retained, along with dash panel and roof reinforcements, more rigid wheels and dynamic dampers on the upper arms of the front suspension and on the rear knuckles - for low road noise.

For the facelift's 2.2-litre diesel engines, noise that can occur during cold start is reduced . Measures taken here include revising the pressures, pattern and timing of fuel injection, revising the control of exhaust-gas recirculation (EGR), and using glow plugs which assist combustion.