Investigation will now examine payments made to former Nissan chairman before 2017
Renault has said it has so far found no evidence of illegal or fraudulent payments to Carlos Ghosn, despite the chief executive of the French carmaker remaining under arrest in Japan.
Ghosn was arrested in November by Japanese authorities over allegations he underreported income from Nissan, the carmaker he formerly led alongside Renault. He remains in the custody of Japanese authorities in Tokyo.