PSA Group is holding talks with General Motors about buying its European Opel division, the French carmaker said today.
Such a deal would increase competition for market leader Volkswagen.
The maker of Peugeot, Citroen and DS cars is "exploring a number of strategic initiatives with GM with the aim of increasing its profitability and operating efficiency, including a potential acquisition of Opel," a spokesman said.
The confirmation came after sources told Reuters earlier today that the two companies were in advanced discussions to combine PSA with the US car maker's Opel business.
A deal may be announced within days, the sources said.
GM and PSA already share production of SUVs and commercial vans, a relic of their last attempt to forge a broader alliance, which was unwound in 2013 with the sale of the US carmaker's stake in PSA.
Together, PSA and Opel would command a 16.3% share of the European car market share compared with Volkswagen's 24.1%, based on 2016 data.
For GM, offloading Opel could mean giving up on the global sales volume race in which it is currently ranked third behind Volkswagen and Toyota, with just over 10 million vehicles delivered last year.
The Detroit-based group would be likely to keep a stake in the combined entity, one of the sources told Reuters.
Under chief executive Carlos Tavares, PSA has rebounded from a 2013-14 brush with bankruptcy to reach record levels of earnings, posting a 6.8% automotive operating margin in the first half of last year.
The carmaker sold 3.15 million vehicles last year.
Tavares has signalled openness to a tie-up that would increase PSA's scale and ability to meet growing investment demands in vehicle electrification, driving technology and connected services.
GM has consistently struggled to make a profit at its Opel division, which includes Britain's Vauxhall brand.
It had previously discussed a sale to Canadian parts maker Magna in the aftermath of the financial crisis, before pulling the plug on the tentative deal in 2009.
The company missed last year's target of reaching breakeven in Europe, despite buoyant demand, and warned it would struggle to restore regional profitability before 2018.