Exhaust Temperature Sensor: Description and Operation

Exhaust Sensor Overview

• If the particulate filter or exhaust pressure sensor 1 (G450) is replaced, the exhaust pressure sensor 1 must be adapted with the vehicle diagnostic tester: guided functions; adapt exhaust pressure sensor 1.





1 Reduction Catalytic Converter

2 Exhaust Gas Temperature (EGT) Sensor 4 (G648)

• 45 Nm

• Lubricate with hot bolt paste (G 052 112 A3).

3 Particulate Filter

4 Exhaust Pipe with Catalytic Converter

5 EGT Sensor 3 (G495)

• 45 Nm

• Note the installed position.

• Lubricate with hot bolt paste (G 052 112 A3).

6 Catalyst Temperature Sensor 1 (G20)

• 45 Nm

• Note the installed position.

• Lubricate with hot bolt paste (G 052 112 A3).

7 EGT Sensor 2 (G448)

• 45 Nm

• Note the installed position.

• Lubricate with hot bolt paste (G 052 112 A3).

8 Nut

• 2.5 Nm

9 Nitrogen Oxide (NOx) Sensor (G295)

• 45 Nm

10 Heated Oxygen (HO2S) Sensor (G39)

• 50 Nm

• Only lubricate the threads with hot bolt paste (G 052 112 A3). Do not allow the hot bolt paste to enter the slits on the sensor body.

• To remove, use ring spanner 7-piece set (3337).

11 Turbocharger

12 EGT Sensor 1 (G235)

• 45 Nm

• Lubricate with hot bolt paste (G 052 112 A3).

13 Exhaust Pressure Sensor 1 (G450)

14 Nut

15 Exhaust Pressure Sensor 1 Control Line

16 NOx Sensor 2 (G687)

• 45 Nm

17 Nut