NotesPart Note: Regulating Probe, Fitting position: Before catalytic converter, Number of circuits: 4, Universal part no. available: F00HL00351, Part Note: Diagnostic Probe, Fitting position: After catalytic converter, Number of circuits: 4, Universal part no. available: F00HL00351, Part Note: Regulating Probe, Fitting position: Before catalytic converter, For OE No: 55353812, Number of circuits: 4, Universal part no. available: F00HL00351, DESCRIPTION: Lambda Sensor, Trade No: Ls50355, Size Mm: Overall Len: 500