Red Bull's chief wants engine supplier to Renault to improve their reliability . Red Bull's's Daniil Kvyat retired at Australian Grand Prix with gearbox failure . Toro Rosso are also powered by Renault and saw Max Verstappen retire .
Red Bull chief wants engine supplier to Renault to improve their reliability . Red Bull's Daniil Kvyat retired at Australian Grand Prix with gearbox failure . Toro Rosso are also powered by Renault and saw Max Verstappen retire .