Kammala jumla mai zuwa: Kungiyar ba ta shiga cikin tsere biyu na farko na 1978, a
Argentina da Brazil, amma ya dawo don Kyalami. Jabouille ya tabbatar da matsayin da ya fi dacewa na Renault har zuwa yau, tare da wuri na shida, kawai 0.71 seconds a bayan poleitter Niki Lauda a cikin Brabham. Ya fadi daga cikin maki a farkon tseren kafin ya yi ritaya tare da matsalolin lantarki a zagaye na 39. A Long Beach, Jabouille ya cancanci 13th, amma ya yi ritaya yayin da turbo ya sake kasawa a zagaye na 44. Ya kasance na goma sha biyu a cikin cancanta don Grand Prix na farko na Monaco, kuma ya ba wa ƙungiyar nasarar farko a cikin Formula One, inda ya gama a matsayi na goma a zagaye huɗu a kan wanda ya lashe tseren Tyrrell Patrick Depailler.