Rubuta ci gaba ga wannan sakin layi - Brabham ya maye gurbin Schenken da Argentinian Carlos Reutemann don 1972. Hill ya kasance tare da tawagar, amma Brabham ya sanya Argentine a cikin BT34. Babban Prix na Argentina na 1972 ya ga Reutemann ya ɗauki matsayi na farko a babban kyautarsa amma ya gama na bakwai. Dan wasan na Argentina ya yi ritaya daga Afirka ta Kudu saboda gazawar tsarin mai. Reutemann ya karya idon sawunsa bayan lalacewar inji a kan Rondel Racing ya shiga Brabham a Thruxton yayin tseren Formula Two. Ba a yi amfani da BT34 ba a cikin Mutanen Espanya da Monaco Grands Prix. Ga kasar Belgium
, Brabham ya shiga mota ta uku don ɗan Brazil Wilson Fittipaldi, amma ya yi ritaya tare da akwatin gearbox. Dan wasan na Brazil ya kammala na takwas a gasar Grand Prix ta Faransa. Fittipaldi ya gama na 12 a Biritaniya duk da cewa ya dakatar da motar a zagaye na 69 tare da katsewar dakatarwa. Dan wasan na Brazil ya kammala na bakwai a gasar Grand Prix ta Jamus. Fittipaldi ya yi ritaya daga tsere huɗu na ƙarshe na shekara, gazawar birki a Austria, rushewar dakatarwa a Italiya, fashewar gearbox a Kanada da gazawar injin a Amurka.