The DENSO Lambda Sensor (DOX-0402) is engineered to accurately measure the oxygen content in your vehicle's exhaust gases. This critical data allows the engine control unit (ECU) to adjust the air-fuel mixture for optimal combustion. By maintaining the correct air-fuel ratio, this sensor helps to improve fuel efficiency and reduce harmful emissions. A properly functioning lambda sensor is essential for passing emissions tests and ensuring your vehicle runs smoothly. DENSO is a leading manufacturer of automotive components, known for their quality and reliability. This sensor is designed to meet or exceed OE specifications, providing a dependable solution for your vehicle's needs.