The E30 automobile platform was the basis for the 1982 through 1991 BMW 3 Series entry-level luxury car / compact executive car. It was the successor of the BMW E21 in 1982 and was replaced by the BMW E36 in 1992. BMW continued to produce the cabriolet (convertible) E30 well into 1993. The M3 cabriolet was never officially offered for sale in North America; it was offered only for the European market.

The famous BMW M3 was first introduced on the E30 platform. A widened version of the E30 front suspension and the drivetrain from the E30 325i were used in the BMW Z1 roadster.

The E30 3 series was produced in four body styles, a 4 door saloon, a 2 door coach (actually just a 2 door variant of the saloon), a 5 door estate (marketed as the "touring"), and a two-door convertible. A Baur cabrio was also available. The 325ix was produced from 1988 to 1992, and featured all-wheel drive. It was available as a two-door (coach) or a four-door (sedan). The BMW M3 utilised a widened and heavily redesigned and restyled variation of the 2 door body style. The M3 shares few parts with other E30 models.