Remove/Install Oxygen Sensors - AR07.04-P-0021MNB
Engine 178 In Model 190
| Risk of injury . Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Remove/install | |||
| 1 | Open hood. | AR88.40-P-1000RG | |
| 2 | Remove cover (22). | ||
| 3 | Remove heat shield (23) of exhaust gas turbochargers. | Engine 178 in model 190 (except 190.381) | AR09.40-P-6026MNA |
| Engine 178.9 in model 190.381 | AR09.40-P-6044MNJ | ||
| 4 | Unclip electric line (16) at side heat shield of left exhaust gas turbocharger. | For removal of the left oxygen sensor upstream of CAT (6) | |
| 5 | Unclip electric line (21) at side heat shield of right exhaust gas turbocharger. | For removal of the right oxygen sensor upstream of CAT (14) | |
| 6 | Remove seal (34). | For removal of the left oxygen sensor downstream of CAT (7) | |
| 7 | Unclip wiring harness (8) at side wall (9). | For removal of the left oxygen sensor downstream of CAT (7) | |
| 8 | Remove vacuum line (10) at brake booster and remove upwards. | For removal of the left oxygen sensor downstream of CAT (7) | |
| 9 | Remove screws (11). | For removal of the left oxygen sensor downstream of CAT (7) | |
| 10 | Remove nut (12), lift side wall (9), and pull out feed-through grommet (13) n. | For removal of the left oxygen sensor downstream of CAT (7) | |
| 11 | Remove side wall (9) in upward direction. | For removal of the left oxygen sensor downstream of CAT (7) | |
| 12 | Unclip wiring harness (1). | For removal of the right oxygen sensor downstream of CAT (15) | |
| 13 | Unclip electrical connectors (2). | For removal of the right oxygen sensor downstream of CAT (15) | |
| 14 | Remove seal (3). | For removal of the right oxygen sensor downstream of CAT (15) | |
| 15 | Remove screws (4) and remove partition (5) in upward direction. | For removal of the right oxygen sensor downstream of CAT (15) | |
| 16 | Remove mounting clamp of right catalytic converter at right exhaust gas turbocharger. | When removing right lambda sensor downstream of catalytic converter (15). | AR49.10-P-5500MNB |
| 17 | Remove right catalytic converter at exhaust system. | When removing right lambda sensor downstream of catalytic converter (15). | AR49.10-P-5500MNB |
| 18 | Remove lower holder of right catalytic converter at drive shaft with drive shaft housing. | When removing right lambda sensor downstream of catalytic converter (15). | AR49.10-P-5500MNB |
| 19 | Remove upper holder of right and left catalytic converters at crankcase. | When removing right lambda sensor downstream of catalytic converter (15). | AR49.10-P-5500MNB |
| 20 | Remove upper holder of right and left catalytic converters at right and left catalytic converters. | When removing right lambda sensor downstream of catalytic converter (15). | AR49.10-P-5500MNB |
| 21.1 | Unclip electrical connector (17) at holder and disconnect. | When removing left lambda sensor upstream of catalytic converter (6). | |
| 21.2 | Unclip electrical connector (18) at holder and disconnect. | When removing left lambda sensor downstream of catalytic converter (7). | |
| 21.3 | Unclip electrical connector (19) at holder and disconnect. | When removing right lambda sensor downstream of catalytic converter (15). | |
| 21.4 | Unclip electrical connector (20) at holder and disconnect. | When removing right lambda sensor upstream of catalytic converter (14). | |
| 22 | Remove left lambda sensor upstream of catalytic converter (6), left lambda sensor downstream of catalytic converter (7), right lambda sensor upstream of catalytic converter (14), and right lambda sensor downstream of catalytic converter (15). | Paste, hot lubrication 1 kg, DBL 6879.20 |
*BR00.45-Z-1005-06A |
| *BA14.00-P-1002-02B | |||
| *BA14.00-P-1001-02B | |||
| Fig 1 | |||
| 23 | Install in the reverse order. | ||
| 24 | Connect diagnostic system, read out fault memory and clear if necessary. | ||
| AD00.00-P-2000-04B | |||
| Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 25 | Perform engine test run to check exhaust system for leaks. |
OXYGEN SENSOR
| Number | Designation | Engine 178 | |
|---|---|---|---|
| BA14.00-P-1001-02B | Oxygen sensor upstream of catalytic converter to exhaust system at front | Nm | 50 |
OXYGEN SENSOR
| Number | Designation | Engine 178 | |
|---|---|---|---|
| BA14.00-P-1002-02B | Oxygen sensor downstream of catalytic converter to exhaust system at front | Nm | 50 |
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1005-06A | Paste, hot lubrication 1 kg, DBL 6879.20 | A 000 989 76 51 |