Type Lambda Sensor. Engine Code: 940 C1.000; Engine Code: 552 80 444; Construction Year from: 04/2015; Lambda Sensor: Regulating Probe; Fitting Position: before catalytic converter; for OE No.: 55283961; or; Engine Code: 940 C1.000; Engine Code: 552 80 444; Construction Year from: 04/2015; Lambda Sensor: Diagnostic Probe; Fitting Position: after catalytic converter; for OE No.: 55283961.