One of the many small but hard-working parts in your car's engine is the Audi A8 oxygen sensor. Part of a network of sensors that regulates your engine's combustion cycle, the A8 oxygen sensor monitors oxygen levels in the combustion residue your vehicle generates. You will find your Audi A8 oxygen sensor located near your exhaust manifold.

The job of the A8 oxygen sensor is an important one. Your engine relies on a combination of oxygen and fuel to run, and the Audi A8 oxygen sensor ensures that there is a sufficient, optimal mix present in your combustion chambers.

The A8 oxygen sensor strives for a 14.7:1 ratio of oxygen to fuel, which minimizes fuel waste while still ensuring your engine uses enough fuel to protect it from damage. Since too little fuel can cause serious harm to your engine, your car will default to using too much when your Audi A8 oxygen sensor is not working properly. A faulty A8 oxygen sensor will therefore lower your fuel economy, and can lead to eventual catalytic converter damage through excess fuel emitted through your exhaust. Problems with your Audi A8 oxygen sensor are typically detected during a systems diagnostic check, or in the event that your car fails an emissions test. However, a diagnostics test will not always catch a bad A8 oxygen sensor, as this sensor can function intermittently when it is faulty. If you notice a decrease in fuel efficiency, it may be time to replace your Audi A8 oxygen sensor. We carry a full line of A8 oxygen sensors in our convenient online catalogue.Simply select your vehicle's year, make and model, place your order, and your new Audi A8 oxygen sensor will be sent right to your door.