The Audi 90 oxygen sensor is a small device that performs an important function, helping in the efficient operation of your engine. Placed in the exhaust system in most vehicles, the 90 oxygen sensor monitors the amount of oxygen present in the vehicle emissions after engine combustion. The measurement is transmitted to the vehicle computer with a voltage signal by the Audi 90 oxygen sensor, used to determine whether the fuel and air mixture sent to the engine for combustion needs adjustment.

The goal of this monitoring and adjustment cycle is to promote a clean burn of the fuel in the combustion chamber, which provides an efficient combustion process, maximizing the power and performance of the engine, and minimizing vehicle emissions. This process is a continuous one, allowing the engine to compensate for changing levels of oxygen in the air it receives due to factors such as air temperature and elevation among many others, allowing the fuel and air ratio to be adjusted for efficiency in these changing conditions.

If the 90 oxygen sensor fails, unable to transmit its signal, the vehicle computer will be left with no basis upon which to make adjustments to the fuel and air mixture, usually causing it to default to a rich mixture, sending a greater amount of fuel in the mixture than air. This can cause some of the fuel to be left unburned after combustion, leading to poor vehicle performance, increased emissions, and excess fuel consumption. Our online catalog carries a selection of quality Audi 90 oxygen sensor replacements at very reasonable prices.Our secure site will make ordering fast and easy or our toll-free phone line is just as convenient, with courteous customer service representatives ready to help you order your 90 oxygen sensor.