Kammala jumla mai zuwa: Tare da McLarens na Prost da Niki Lauda masu rinjaye, Arnoux ya sami nasarar kakar wasa ta biyu a Ferrari, kawai ya gama na 6 tare da maki 27, tare da sabon abokin aikinsa Michele Alboreto a hankali yana ɗaukar himma da jagorancin ƙungiyar daga gare shi. Bayan cin nasara uku da matsayi hudu a 1983, Arnoux ya kasa cin nasara ko neman matsayi a 1984 (Alboreto ya lashe Grand Prix na Belgium daga matsayi tare da Arnoux ya fara na biyu kuma ya gama na uku), ko da yake ya gama na biyu a
San Marino da Dallas inda aka tilasta masa farawa daga pits saboda matsalar lantarki a zagayen dumama kuma ya yi nasarar kiyaye motarsa daga matsala a kan hanyar da ke rushewa. Grand Prix kawai da aka taɓa gudanarwa a Dallas shi ne kuma karo na ƙarshe da Arnoux ya sami nasarar kammala gasar Formula One. Yayin da kakar wasa ta ci gaba, Arnoux ya bayyana rashin motsawa, kuma bayan ya gama na 4 a tseren buɗe gasar zakarun Turai a Brazil, ya bar Ferrari ta hanyar yarda da juna. Matsayinsa a cikin tawagar an dauki shi ne da direba na Sweden Stefan Johansson. An gan shi a cikin rami na Brabham a Imola a zagaye na 3, yana haifar da jita-jita cewa zai shiga ƙungiyar da Bernie Ecclestone ya mallaka, amma babu abin da ya fito daga gare ta kuma ba a yawan ganinsa a tsere na sauran kakar ba.