Italian carmaker Fiat struck a $4.35 billion deal to gain full control of Chrysler Group LLC, ending more than a year of tense talks that have obstructed Chief Executive Sergio Marchionne's efforts to combine the two automakers' resources.

The agreement, announced on Wednesday, cements Marchionne's reputation as the industry's consummate deal maker about a decade after he took the helm of Fiat as a car business newcomer, analysts and bankers said.