Oxygen Sensor Lambda Sensor AIR FUEL RATIO O2 SENSOR for Alpina B7 BMW E60 E63 E64 E65 E66E67 Mercedes-Benz SLK R171 A0045422218 Oxygen Sensor Lambda Sensor AIR FUEL RATIO O2 SENSOR for Alpina B7 BMW E60 E63 E64 E65 E66E67 Mercedes-Benz SLK R171 A0045422218. Sale price : $28.69 Category : Automobiles, Parts & Accessories