To remove

Unplug the oxygen sensor and carefully lower the cable.

Fig 1: Illustration For Step 1-2
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Remove the heat shield over the turbocharger (note the clip underneath the heat shield).
Remove the oxygen sensor.

Fig 2: Illustration For Step 3
Courtesy of SAAB-SCANIA OF AMERICA, INC.