Remove/Install Heated O2 Sensor - AR07.52-P-5303GQ
ENGINE 276.9 in MODEL 166, 251
Shown on model 166
| Remove/install | |||
| Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. | No parts of the body or limbs should be within the operating area when the components are moving. | AS00.00-Z-0011-01A | |
| Risk of death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. | AS00.00-Z-0010-01A | |
| 1 | Switch off ignition | ||
| 2 | Remove front engine cover (2) | ||
| 3 | Remove partition wall between wheel wells | MODEL 251 | AR62.30-P-2400RT |
| 4 | Remove air filter housing (3) | To remove the RH oxygen sensor upstream of the catalytic converter (G3/4) |
*BA09.10-P-1001-01M |
| *BA09.10-P-1002-01M | |||
| 5 | Remove ME-SFI [ME] control unit | To remove the LH oxygen sensors (G3/3, G3/5) | AR07.08-P-7008GQ |
| 6 | Unclip engine wiring harness on ME-SFI [ME] control unit bracket | To remove the LH oxygen sensors (G3/3, G3/5) | AR07.08-P-7008GQ |
| 7 | Unclip electrical connector (5 or 8) at bracket and disconnect | ||
| Oxygen sensor downstream of CAT (G3/5 or G3/6) | |||
| 8 | Remove corresponding underfloor paneling | MODEL 166 | AR61.30-P-1001GQ |
| MODEL 251 | AR61.30-P-1001RT | ||
| 9 | Unclip electrical line (14 or 16) at shield (6 or 7) and EGR line | ||
| 10 | Remove oxygen sensor (G3/5 or G3/6) from CAT | *BA14.00-P-1002-01A | |
| *BR00.45-Z-1005-06A | |||
| Fig 1 | |||
| Remove oxygen sensor upstream of catalytic converter (G3/3 or G3/4) | |||
| 11.1 | Unclip electrical line (13) at bracket for air filter housing (3) | To remove the RH oxygen sensor (G3/4) | |
| 11.2 | Unclip electrical line (15) at bracket for the ME-SFI [ME] control unit | To remove the LH oxygen sensor (G3/3) | |
| 12.1 | Remove shield (7) | To remove the RH oxygen sensor (G3/4) | |
| 12.2 | Detach ME-SFI [ME] control unit bracket with shield (6) | To remove the LH oxygen sensor (G3/3) | |
| 13 | Remove oxygen sensor (G3/3 or G3/4) from CAT | *BA14.00-P-1005-01A | |
| *BR00.45-Z-1005-06A | |||
| Fig 1 | |||
| 14 | Install in the reverse order | ||
| 15 | Read out fault memory using the diagnostic system and clear if necessary | ||
| AD00.00-P-2000-04A | |||
| 16 | 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. Test run engine and check exhaust system for leaks |
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 |
AIR FILTER
| Number | Designation | Engine 276.9 | |
|---|---|---|---|
| BA09.10-P-1001-01M | Bolt, air filter to cylinder head cover | Nm | 9 |
AIR FILTER
| Number | Designation | Engine 276.9 | |
|---|---|---|---|
| BA09.10-P-1002-01M | Bolt, air filter to air intake pipe support brace | Nm | 9 |
OXYGEN SENSOR
| Number | Designation | Engine 276 | |
|---|---|---|---|
| BA14.00-P-1002-01A | Oxygen sensor at catalytic converter | Nm | 50 |
OXYGEN SENSOR
| Number | Designation | Engine 276 | |
|---|---|---|---|
| BA14.00-P-1005-01A | Oxygen sensor upstream of catalytic converter | Nm | 50 |
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1005-06A | Paste, hot lubrication 1 kg, DB supply specification 6879.20 | A 000 989 76 51 |