LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2004 >> G55 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Ignition System >> Mixture Formation -- Basic Knowledge -- G-Class (463) - 1 Of 3 >> Basic Knowledge >> O2 sensors, location/task/design/function - GF07.04-P-4103AM
April 5, 2026: LEMON Manuals is launched! Read the announcement.

O2 sensors, location/task/design/function - GF07.04-P-4103AM

ENGINE 113.990 /991 /993 

ENGINE 113.992 /995 up to Model Year 8 

Fig 1: Identifying Left/Right O2 Sensors, Connection Line And Socket (4-Pin)
G07870861Courtesy of MERCEDES-BENZ USA
  O2 sensor, location   GF07.04-P-4103-02AM 
  O2 sensor, task Detecting the residual oxygen content in exhaust gas and supplying it as a signal voltage to the ME-SFI [ME] control unit (N3/10).
O 2  sensor upstream of TWC (slave sensor): 
  • Lambda control
  • Self adaptation of mixture formation
  • Function chain test

O 2  sensor downstream of TWC (master sensor): 
  • Two-sensor control
  • Monitoring of the catalytic converter effect
  
  O2 sensor, design   GF07.04-P-4103-03AM 
  O2 sensor, function   GF07.04-P-4103-01AM 
scientia non olet · About LEMON Manuals