Mazda quieted down the 6’s interior in its 2016 update but has further addressed the issue with thicker front-door glass (except in Grand Touring models, which get acoustic-laminated glass). Meanwhile, seals and weather stripping have been optimized to stifle noise. There also is better sound suppression between the door-panel trim and the doors’ inner structure, as well as more noise-reducing material in the headliner.
The Mazda 6 or Mazda6 (known as the Mazda Atenza in China and Japan, derived from the Italian attenzione ) is a Midsize family produced by the Japanese car manufacturer Mazda since 2002. It replaced the long-produced Mazda Capella (616, 626) in 2002. The Mazda6 sold more than one million units faster than all previous Mazdas. 
The 2006 Mazdaspeed Atenza (known as Mazdaspeed6 in North America and Mazda 6 MPS in Europe, South Africa and Australia) is a high-performance version of the Mazda 6. Its mission statement was written with the help of Peter Birtwhistle, chief of Mazda's advanced design studio in Germany at the time. It was initially unveiled as a concept at the 2002 Paris show. It features a turbocharged version of the 2. 3 L MZR I4 which produces 272 PS (200 kW) (European version is detuned to 260 PS (191 kW); the North American version, at 274 hp (204 kW), revised to 270 hp (200 kW) for 2007). All models have 280 lb⋅ft (380 N⋅m) of torque. This 2. 3 L DISI turbocharged engine features direct fuel injection and conforms to the new Euro 5 emissions standards. It has a revised front fascia with a raised hood, a 6-speed manual transmission, and all-wheel drive. The all-wheel-drive system uses Mazda's Active Torque Split computer-based control, which routes up to 50% of the power to the rear wheels depending on driving conditions.