Italy's new car registrations slipped about 4% year-on-year in November, and Fiat's market share fell against October to around 28.5%, an industry source told Reuters on Tuesday.

"The market closed at the expected levels, at around 171,000 to 172,000 new car registrations," the source reportedly said, noting that revised figures for November 2002 put sales a year ago at 179,000 units.

Fiat's share of its key domestic market was 29.6 percent in October and 28.2 percent in November 2002, Reuters said, against a declared target of 30.2% boosted by the launch of new models.