See also:

Immobilizer System (without Advanced Key)
The immobilizer system allows the engine to start only with a key the system recognizes. If someone attempts to start the engine with an unrecognized key, the engine will not start, thereby helpi ...

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 ...

Interior
Compared with the old 626, the Mazda6's wider body translates into extra space for five occupants. The driver's seat adjusts through a 9.4-inch range, and the 60/40-split rear seatback folds down. ...