This Bosch Lambda Sensor (part number 0258017617) This fits before the catalytic convertor Bank 1 It is a direct fit sensor with a female connector type, suitable for clip-on or screw-in installation. The sensor type is oxygen sensor, specifically a Lambda Sensor for bank 1 before the catalytic converter. This is a genuine Bosch product for vehicles, not a classic part, and is not for universal fitment. The part is brand new and is not required as I decided to go for an alternative route.