土星離子：2003—2007年

????土星離子（Saturn Ion）是土星品牌的另一個(gè)創(chuàng)新失敗之作,。除了沉重昂貴的塑料車身之外，它的失敗之處還在于它的“對(duì)開(kāi)門(mén)”式設(shè)計(jì),。后方車門(mén)很窄,，看起來(lái)就像衣柜的門(mén)，只有正常車門(mén)寬度的一半,，而且不能單獨(dú)打開(kāi),，只有在前門(mén)打開(kāi)之后才能開(kāi)啟。離子轎車2007年就淡出了市場(chǎng),，兩年后,，整個(gè)土星產(chǎn)品線也隨之湮滅,。此后,，通用（General Motors）和其他美國(guó)廠商再也沒(méi)搞過(guò)“對(duì)開(kāi)門(mén)”的轎車設(shè)計(jì),。

Saturn Ion: 2003-2007

????Along with heavy, expensive plastic skin, the Ion "quad coupe" with two small hatch-like rear doors represents another failed innovation by Saturn. The rear half-size apertures couldn't be operated independently; they could only be opened after the front doors. The Ion disappeared in 2007, and the entire Saturn line followed it into oblivion two years later. Not General Motors nor any other American manufacturer has seen fit to revive the quad coupe since then.