O2 Sensors, Location

O2 Sensors, Position




Engine 111.951/55 Low emission EURO3
G3/2 O2 sensor upstream of TWC




Engine 111.951/55 Low emission EURO3
G3/1 O2 sensor downstream of catalytic converter




Engine 111.951 low emission D4
157 Firewall catalytic converter
G3/2 O2 sensor upstream of catalytic converter
G3/1 O2 sensor downstream of catalytic converter




Engine 111.951 low emission D4
158 Catalytic converter




Engine 112
G3/3 Left O2 sensor upstream of catalytic converter
G3/5 Left O2 downstream of catalytic converter




Engine 112
G3/4 Right oxygen sensor, upstream catalytic converter for
G3/6 Right O2 sensor downstream of catalytic converter




Model 209 with engines 112, 113
157 Firewall catalytic converter
G3/3 Left O2 sensor upstream of catalytic converter x1 plug connection
G3/4 Right O2 sensor upstream of catalytic converter x1 plug connection
G3/5 Left O2 sensor downstream of catalytic converter x1 plug connection
G3/6 Right O2 sensor downstream of catalytic converter x1 plug connection