Mercedes S-Class 2004 Model 5.5T Oxygen Sensor 0015409517, makes the engine breathe more smoothly

2004 Mercedes-Benz S-Class 5.5T oxygen sensor (OEM: 0015409517) directly replaces the factory number and is highly universal. It monitors exhaust oxygen content and reports to the ECU to adjust the air-fuel ratio, ensuring smooth engine breathing and linear power output. After installation, it resolves high fuel consumption, weak acceleration, or excessive tailpipe emissions. If idle is unstable, check engine light on, or exhaust emits black smoke, the sensor is likely aging; replacement allows this V8 to regain peak performance and a more confident driving experience.