Although it had some characteristics of the PC1, the Penske PC3 also somewhat resembled the March 751, not only in shape but also in the design of the suspension. The Cosworth DFV engine with the Hewland gearbox did not vary. The PC3 essentially served as an intermediate model: it made its appearance in the last GP of the 1975 F1 season, but did not take the start. During 1976 John Watson obtained a fifth place at the South African GP. Two PC3s were built. Bob Hayje also drove the car.