TOKYO — Nissan is set to call off merger talks with rival Honda, a source said Wednesday, abandoning a $60 billion-plus tie-up that would have created the world's No. 3 automaker and raising questions about how it will drive a turnaround by itself.

There's strife of the horizon as Nissan vehemently opposes Honda's suggestion of making the struggling carmaker its subsidiary.

Nissan has reportedly told Honda it no longer wishes to discuss a merger, with an official decision expected next week.