At the end of the 80s, work started on a new version of the Polonez. The project manager was John Politowski, the final version of the bodywork designed by Antoni Kasznicki and Zbigniew Kowalczyk. 31 July 1991 started serial production of Caro. Since then he has suddenly started to increase production levels Polonez.

In 1992, we extended an offer of engines 1.5 / 1.6 with the system single-point fuel injection and catalyst (designated as GLI versions. The engines are to run on unleaded petrol. At the same introduced redesigned steering shaft. In 1993, there were several upgrade your car: in the first half of the year widened track width front and rear by 59 mm, which improved the stability of the car. In the fall took place the next series of changes: the bonnet disappeared plastic air intake, which took over the role of a new plastic strip pit in place of metal, upgraded electrical system, improved wiper mechanism, uses a new set of indicators. It has also heating and ventilation of the interior by installing four air vents in the cabin.

In the mid-90s Polonez Caro was the best-selling new car in Poland.