Fiat lowered its 2013 profit forecasts to a range starting at 900 million euros, instead of at 1.2 billion euros.
Fiat and Chrysler CEO Sergio Marchionne told an analyst conference call that the revisions were due mostly to foreign exchange fluctuations.
"I think we have been incredibly and piously diligent in outlining guidance," Marchionne told an analyst conference call. "We are essentially confirming guidance within the foreign exchange limitation of the original numbers."
Marchionne also said he would update the company's 5-year plan, including more details on its car rollouts as he shifts Fiat production in Italy toward higher-margin luxury segment with the Alfa Romeo and Maserati brands.
Marchionne says he plans to launch an initial public offer of U.S. carmaker Chrysler this year after failing to reach a deal to buy out the minority shareholder.
"We are now bent on executing the IPO," Marchionne told analysts, adding he hopes it can be completed by the end of 2013.
Marchionne indicated that the push for the Chrysler IPO is due to a lack of agreement with a United Auto Workers-run trust over the value of its 41.5 percent stake. Fiat, which controls Chrysler, has gone to a U.S. court seeking a judgment on the price, but a judge in Delaware set a trial date for next September.
Chrysler shares haven't been publicly traded since 1998.