Mercedes-Benz W210 Oxygen Sensor A0005408517 High-speed response, optimizes engine air-fuel ratio

If your Mercedes-Benz W210 shows idle instability, weak acceleration, abnormal fuel consumption, or a check engine light, this is typically due to aging or failed oxygen sensor. When functioning normally, it monitors exhaust oxygen content in real time and feeds signals to the ECU to precisely adjust the air-fuel ratio, ensuring efficient combustion, reduced emissions, and improved throttle response. OEM number A0005408517; fits Mercedes-Benz W210 series (1995-2002) gasoline engines. Installation: operate with a cold engine to avoid burns; use a specialized socket to remove the old sensor and apply anti-seize to the new sensor threads to prevent high-temperature sticking; clear fault codes and road-test after installation to ensure self-learning functions normally.