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The BOSCH Lambda sensor, part number 0 258 017 319, plays a crucial role in your vehicle's emissions control system. It measures the amount of oxygen in the exhaust gases and sends this data to the engine control unit (ECU). By providing precise oxygen level information, the ECU can adjust the air-fuel mixture in real-time. This precise adjustment is essential for maximizing fuel economy, reducing harmful emissions, and ensuring your engine runs smoothly. This sensor is engineered by BOSCH, a trusted name in automotive technology, to meet high standards of quality and durability. Replacing a faulty lambda sensor can resolve issues such as poor fuel economy, rough idling, and check engine lights.