Oxygen Sensors

Fig 1: Oxygen Sensors Components Location With Torque Specification - V6 Biturbo

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Oxygen sensors - V6 biturbo

1. Oxygen sensors upstream of catalytic converter/coat thread with hot screw paste  >Tightening torque 52 Nm (38 ftlb.) 
2. Oxygen sensors downstream of catalytic converter/coat thread with hot screw paste  >Tightening torque 52 Nm (38 ftlb.)