The 1990 BMW Open was an Association of Tennis Professionals men's tennis tournament held on outdoor clay courts in Munich, West Germany.

The tournament was held from 30 April to 7 May 1990.

Unseeded Karel Nováček won the singles title.

[3] Karel Nováček defeated Thomas Muster 6–4, 6–2 Udo Riglewski / Michael Stich defeated Petr Korda / Tomáš Šmíd 6–1, 6–4