Renault have promised Red Bull that they will resolve power-unit problems . Red Bull owner Dietrich Mateschitz threatened to pull out of F1 . - The FIA has said it is investigating the matter and could take action if there are any breaches in regulations or safety procedures.
Renault have promised Red Bull that they will resolve power-unit problems . Red Bull owner Dietrich Mateschitz threatened to pull out of F1 . Daniil Kvyat 's Red Bull and Max Verstappen ' Toro Rosso both suffered a power-unit failure at Chinese Grand Prix in Shanghai .