The 330i sedan has a more powerful version of the 325i's 3.0-liter six, producing 255 horsepower, or an increase of 30 from 2005. The 330Ci coupe; and 330Ci convertible have a 225-horsepower 3.0-liter engine that's different from the newer one in the sedans. Like the 330i sedan, these models get a similar upgrade in standard equipment compared to the 325s. Safety features that come standard include dual stage front-impact airbags, front side-impact airbags and full-cabin head protection airbags. Active safety features on all 3 Series models include Dynamic Stability Control anti-skid electronics and the latest generation antilock brakes.For 2006, the BMW 3-series has been redesigned.