BMW 1 Series Front Oxygen Sensor 11787537984 Universal Replacement 0258017038

BMW 1 Series front oxygen sensor (OEM 11787537984) can be replaced with the original and is compatible with Bosch 0258017038 as a universal substitute; fits 1 Series (E81/E82/E87/E88) and some 3 Series, X1 models. Monitors exhaust oxygen content and feeds ECU to adjust air–fuel ratio for combustion efficiency. Replacement resolves idle instability, weak acceleration, or high fuel consumption and eliminates engine fault lights. If the vehicle has starting difficulties, exhaust emits black smoke, or fuel consumption suddenly increases, the oxygen sensor aging is likely; replace promptly.