He died on July 25, 2018, at age 66, most likely from complications related to underlying cancer. Some reports claimed he had suffered from an invasive shoulder cancer. According to the University Hospital of Zürich, Marchionne had been treated for a "serious illness" for over a year before his death, which was also noted by his partner's father Pier Luigi Battezzato. He had also quit smoking since his treatment started. FCA did not have knowledge of his health condition until just weeks before his death.