Product description original BOSCH UNIVERSAL OXYGEN SENSOR * FIT TO 1,2,3,4-WIRE SENSOR ONLY * Check wires prior to purchase or contact us at automotive oxygen sensor *, also known as O2 sensor in, lambda probe, lambda sensor, lambda sond or EGO (exhaust gas oxygen) sensor, is a small sensor inserted into the exhaust system of a petrol engine to measure the concentration of oxygen remaining in the exhaust gas to allow for electronic control unit (ECU) to control the efficiency of the com. .
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