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Home >> Mercedes Benz >> 2021 >> GT 43 AMG >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Engine -- Mixture Formation (2 Of 3) -- 290 Chassis >> Testing & Repair >> Remove/Install Oxygen Sensor >> Remove/Install Left Oxygen Sensor Upstream Of Catalytic Converter - AR07.04-P-0081MNI

Remove/Install Left Oxygen Sensor Upstream Of Catalytic Converter - AR07.04-P-0081MNI

Engine 177 in model 290 

Fig 1: Left Oxygen Sensor Upstream Of Catalytic Converter Components Location - Engine 177 In Model 290
G16557304WARNINGCAUTIONREMOVINGINSTALLINGINSTALLATION IMPORTANTIMPORTANTINSTALLATION IMPORTANTTORQUE SPECIFICATIONSPECIAL TOOLSPECIAL TOOLREFER TO SELF-DIAGNOSTIC SYSTEMSWARNINGCourtesy of MERCEDES-BENZ USA
WARNING Risk of burn injuries  , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning  caused by skin contact with solid components of the exhaust. Wear protective clothing and safety glasses. Use the extraction system. Move people out of the danger zone. AS49.00-Z-0001-01A
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
  Note on calculation of tightening torque when using insertion or socket tools with various effective lengths   AH00.00-P-0015-01CW
REMOVINGINSTALLING Remove/install     
1 Remove upper engine cover. INSTALLATION IMPORTANT Do not install upper engine cover until after the leak test.  
2 Unclip electrical line of lambda sensor on left upstream of catalytic converter (G3/3).    
3 Unclip electrical connector (3) and electrical connector (1).    
4 Release and disconnect electrical connector (3).    
5 Remove lambda sensor on left upstream of catalytic converter (G3/3). IMPORTANTCommercially available devices/tools  22 mm lambda sensor socket  
    INSTALLATION IMPORTANT Coat thread of left lambda sensor upstream of catalytic converter (G3/3) with heat-resistant lubricating paste.  
    TORQUE SPECIFICATION Oxygen sensor upstream of catalytic converter to exhaust system at front *BA14.00-P-1001-02B 
    Paste, hot lubrication 1 kg, DBL 6879.20 *BR00.45-Z-1005-06A 
6 Cover sensor tip of lambda sensor on left upstream of catalytic converter (G3/3) with protective cover. When reusing lambda sensor on left before catalytic converter (G3/3).  
    SPECIAL TOOL Set of protective covers Fig 2
7 Seal threaded hole of the lambda sensor on the left before catalytic converter (G3/3) in catalytic converter (2) with a suitable stop plug. SPECIAL TOOL Record plug Fig 3
8 Install in the reverse order.    
9 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06FR
WARNING 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
10 Perform an engine test run; check the engine for proper operation and the exhaust system for leaks.    
11 Install upper engine cover.    
OXYGEN SENSOR

Number Designation Engine 177
BA14.00-P-1001-02B Oxygen sensor upstream of catalytic converter to exhaust system at front Nm 50
Fig 2: Identifying Set Of Protective Covers (001 589 11 91 00)
G16145381Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Record Plug (129 589 00 91 00)
G16145009Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1005-06A Paste, hot lubrication 1 kg, DBL 6879.20 A 000 989 76 51