The Yugo was actually a FIAT with a nameplate change..................
For what it’s worth:
Many mechanics and even Zastava factory workers agree that the “best” Yugos ever were built between 1988 and early 1991. Quality control was good; high standards were set in terms of plastic quality, seat cloth, and “a well screwed together” interior. Paint and antirust coatings were also well done during that period, evidenced by many cars still showing no signs of rust, tears in the seats, or major engine issues after more than 20 years.
1989 was considered a “golden year” for Yugos because almost 200,000 were built that year, and many can still be seen on the road today. Also, cars were usually branded Yugo instead of Zastava during that period, because the company was taking pride in the (at the time) good sales and reputation established in the export markets, especially in the United States.
In 1990, a batch of 450 cars with automatic transmissions and air conditioning was shipped to the United States. With political problems starting in 1991, quality dropped significantly, coming to such low standards such as plastic parts of the dashboard not fitting correctly.
https://en.wikipedia.org/wiki/Yugo#1988%E2%80%931991