Marelli is seeking the cancellation of about 450 billion yen ($3.3 billion) in debt out of total obligations of about 1.13 trillion yen, as part of a wider restructuring, sources say.

Japan's Envision AESC will invest $2 billion to build a battery-cell and module plant in Kentucky to supply Mercedes-Benz and multiple other automakers.

Marelli's worries could mean supply problems for Nissan and Stellantis, and also reveal the bumpy road that sometimes awaits private equity firms in automotive.