To remove

Unplug the connector (A) for the oxygen sensor and carefully lower the cable.

Fig 1: Identifying Oxygen Sensor Connector
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Raise the car.
Remove the lower turbocharger delivery pipe (B).

Fig 2: Identifying Lower Turbocharger Delivery Pipe
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Run the cable forward and remove the oxygen sensor (C).

Fig 3: Identifying Oxygen Sensor
Courtesy of SAAB-SCANIA OF AMERICA, INC.