Ever since the year 1980, all mass-produced vehicles have included an oxygen sensor. Your Mercedes S420 is no different. But just what is an oxygen sensor, and why do you need one? Well, your Mercedes S420 Oxygen Sensor is responsible for regulating the functions of the combustion process in the engine.

To put it more simply, your oxygen sensor minimizes the amount of emissions produced by your car and maximizes fuel efficiency. It does this by sensing the ratio of oxygen to gas that is being distributed to your engine.

This ratio is important because gasoline requires oxygen to burn, and there is a particular ratio that optimizes performance. If there is too much oxygen mixing with the fuel, then you have what is called a lean mixture. A lean mixture can produce nitrogen-oxide pollutants that damage our atmosphere as well as your car. Too little oxygen mixing with the fuel will result in what is called a rich mixture. A rich mixture leaves extra unburned gas behind, which reduces your vehicle’s efficiency. The outcome of this is more stops at the gas station, and no one wants that. Because factors such as altitude, temperature and barometric pressure can all cause variations in the amount of oxygen entering the engine. This requires constant adjustments by the oxygen sensor. To ensure an optimal mixture of oxygen to gas at all times, you need a quality oxygen sensor. This Mercedes S420 Oxygen Sensor was manufactured to original equipment quality for peak performance and long-lasting results.Order now for cleaner air and more efficient gas mileage.