BMW 3 Series 嘅車身長 4,713 mm、闊 1,827 mm、高 1,440 mm，軸距為 2,851 mm。對比上代，車身加長咗 76mm，軸距亦增加咗 41mm，令車廂空間更加寬敞。
The BMW 3 Series measures 4,713 mm in length, 1,827 mm in width, and 1,440 mm in height, with a wheelbase of 2,851 mm. Compared to the previous generation, the body is 76 mm longer and the wheelbase has increased by 41 mm, providing a more spacious cabin.
