The Swiss was disqualified for taking the short chute into the pits, after his right-hand lower front wishbone began to detach itself from the chassis and his ignition coil started to malfunction.

[14] The Italian Grand Prix saw the Englishman win and the New Zealander fifth but it was the closest finish in history between them and Ronnie Peterson's March, François Cevert's Tyrrell, and Mike Hailwood's Surtees.

When approaching Hawthorn Bend at high speed on lap 15, Siffert's BRM suffered a mechanical failure which pitched it across the track into an earth bank.

Jean-Pierre Beltoise missed Argentina because of legal problems following an accident at the track that claimed the life of Ignazio Giunti in a sportscar race in January 1971.

[18] At the South African Grand Prix, the Frenchman's engine failed, the Englishman and the New Zealander were nine and fourteen laps down respectively and were not classified.

[19] The Spanish Grand Prix was a bad race for BRM with all of their drivers retired; Soler-Roig and Sweden's Reine Wisell with accidents, Beltoise with a broken gearbox and Ganley's engine failed.

[34] The 1973 Monaco Grand Prix was a bad race for BRM with all of their drivers retired, Beltoise had an accident, Lauda's gearbox broke and Regazzoni's brakes failed.

[35] The Swedish Grand Prix saw the Swiss ninth, The Austrian thirteenth and the Frenchman retire with engine failure.

[37] The British Grand Prix saw the Swiss seventh, the Austrian 12th and the Frenchman retired because he was involved in a first lap crash and did not restart.

[43] The 1973 United States Grand Prix saw the Swiss eighth, the Frenchman ninth and The Austrian retire with a broken oil pump.

Beltoise stayed but Clay Regazzoni and Niki Lauda both left for Ferrari and were replaced by Henri Pescarolo and François Migault.