The MG ZS is a sports family car that was built by MG from 2001 until 2005. The ZS is essentially a tuned version of the Rover 45 (which was launched in 1999). The 45 in turn is a facelifted version of the Rover 400 which was launched in hatchback form in 1995 and saloon form in 1996. The Earlier version of the 400 (Rover 400 Mk 1) was significantly different to the Mk 2 model. The 45 (Mk 1) had no parts based on the Mk 1 400.