Sources told CNBC that Carlos Tavares was fixated on near-term costs and profits to the detriment of the business as well as the company's products.

Troubled automaker Stellantis has decided that its Ram brand needs its own executive, so it is bringing back an executive who retired this year when CEO Carlos Tavares was still running the company.

Carlos Tavares, who had been under fire and was expected to leave at the end of his contract, resigned abruptly on Sunday.