BMW M3 Sedan 嘅車身長 4,801 mm、闊 1,903 mm、高 1,437 mm，軸距 2,857 mm。而 M3 Touring 旅行版嘅車身高度稍微增加至 1,446 mm。兩個版本嘅長度同闊度一樣，Touring 版主要分別在於車尾造型同行李空間。
The BMW M3 Sedan measures 4,801 mm in length, 1,903 mm in width, and 1,437 mm in height, with a wheelbase of 2,857 mm. The M3 Touring estate has a slightly increased height of 1,446 mm. Both versions share the same length and width, with the Touring differing mainly in rear design and luggage space.
