The first generation ES (VZV21) debuted in January 1989 at the North American International Auto Show in Detroit as part of the launch of the Lexus division. In order to avoid introducing the nameplate with only one model, the LS 400, Lexus quickly developed the ES to debut alongside their flagship sedan. The smaller representative of the initial two-sedan Lexus lineup was designated the ES 250, and powered by the Camry's 2.5 L, 116 kW (156 hp) V6, which was aimed directly at the Acura Legend. The ES 250 was based on the Camry Prominent/Vista (V20). Design patents were filed on 17 November 1987, at the Japan Patent Office under the patent number 0666961-006 and registered on 8 August 1989.