https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image36d1a21a946c40cd88807cac4f16802c.txt

<h2>What does the O2 sensor do in a car?</h2>
You can find an oxygen (O2) sensor in your vehicle's exhaust system. It looks similar to a <a href="https://a-premium.com/spark-plug">spark plug</a> and is the same size. It ensures that the oxygen in your car&rsquo;s engine or the air-fuel ratio is optimal. The oxygen sensor exists in two different settings concerning the converter. You can arrange it before the converter or after the converter. Setting it before the converter is called upstream, and setting it after the converter is called downstream. The oxygen sensor gets its data and communicates within the system with the help of an electrical signal or a voltage signal. It sends the data to the central computer located in the engine, and the computer ensures that the mixture of oxygen and fuel is in optimal amounts to keep the engine running in top condition.
The oxygen sensors in your car are not such an item that they need to be replaced regularly without any issue. Unlike the air filters or the oil in your car, you only have to replace the oxygen sensors when they malfunction. If the oxygen sensor fails and does not work properly, the vehicle won't be able to correctly tell the ratio of air and fuel, which can also lead to excessive emissions from the vehicle. This failure to work seamlessly can also damage other components of your car, such as the <a href="https://a-premium.com/catalytic-converter">catalytic converter</a>.
<h2>How to tell a faulty O2 sensor?</h2>
When an&nbsp; O2 sensor in a vehicle becomes faulty or deteriorates, it can exhibit several symptoms including:
<ol>
<li>Increased emissions: Higher pollution output, potential emission test failure.</li>
<li>Check engine light: Illuminates when o2 sensor trouble codes are detected.</li>
<li>Rough idling: Unsteady engine idling and occasional stalling.</li>
<li>Failed emissions test: The vehicle may not pass emissions testing.</li>
<li>Delayed engine response: Slower acceleration when pressing the gas pedal.</li>
<li>Excessive fuel consumption: Increased fuel usage, resulting in higher costs.</li>
</ol>

Oxygen Sensor

Car Oxygen Sensor Price From $24.99 | A-Premium

Price

Related parts

Placement on Vehicle

Make

Material

Color

Warranty

Brand

2009-2016 Audi A4 Quattro 1pc Oxygen Sensor 4-Pin A-Premium APOS0081

2009 Audi A4 Quattro 1pc Oxygen Sensor 6-Pin A-Premium APOS0620

2000-2001 Audi A4 Quattro 1pc Oxygen Sensor Upstream 4-Pin A-Premium OS060

2005-2009 Audi A4 Quattro 1pc Oxygen Sensor 4-Pin A-Premium OS165

2019-2020 Audi A4 Quattro 1pc Oxygen Sensor Upstream 5-Pin A-Premium APOS0619

1997-2000 Audi A4 Quattro 1pc Oxygen Sensor 4-Pin A-Premium APOS0485

2005-2009 Audi A4 Quattro 1pc Oxygen Sensor Downstream Passenger 4-Pin A-Premium APOS0378

2019-2020 Audi A4 Quattro 1pc Oxygen Sensor Downstream 4-Pin A-Premium APOS0790

2009 Audi A4 Quattro 1pc Oxygen Sensor Downstream 4-Pin A-Premium APOS0363

1998-2000 Audi A4 Quattro 1pc Oxygen Sensor 4-Pin A-Premium APOS0316

2005-2009 Audi A4 Quattro 1pc Oxygen Sensor Upstream 6-Pin A-Premium APOS0437

Find reliable Oxygen Sensor designed to fit your Audi A4%20Quattro. Engineered for performance and compatibility. Fast shipping and professional service from A-Premium.

Buy Audi A4%20Quattro Oxygen Sensor | A-Premium

Engine

Body & Lamp Assembly

Brake & Wheel Parts

Drivetrain

Heating & Cooling

Exterior

Suspension & Steering

About us

Audi A4%20Quattro Oxygen Sensor