Renault's decades-long partnership with Nissan may be at boiling point

Stung by the shock arrest of their leader, and now a failed deal to create one of the world’s biggest automakers, decades-long partners Renault SA and Nissan Motor Co. may have finally reached boiling point in their relationship.
 

The implosion of Renault’s merger plans with Fiat Chrysler Automobiles NV has brought the French and Japanese automakers’ tensions out into the open, with Nissan’s reluctance to endorse the deal said to be partially responsible for its failure.
 

In response, Renault Chairman Jean-Dominique Senard sent a letter threatening to block the Yokohama-based company’s plans to overhaul its governance structure. Nissan confirmed that