06F907807B Volkswagen NOx-Sensor

These sensors actually measure the amount of nitrogen oxides – NOx – that are coming out of your exhaust. Basically, they’re telling the car’s computer how well the engine is burning fuel and how effectively the catalytic converter is cleaning things up. It’s a little different than your regular oxygen sensor; those look at oxygen levels, this looks specifically at those NOx gases. There are usually one or two of these on a vehicle, sometimes more on diesels. Think of it as a crucial piece of the emissions puzzle. The car’s computer uses the information from the NOx sensor to fine – tune the engine. It adjusts things like fuel injection and timing to make sure the engine is running as cleanly as possible and keeping those harmful emissions down. It’s all about meeting emissions standards and keeping things environmentally friendly. It sends data to the Engine Control Unit, and that unit makes adjustments based on what the sensor is reporting. Well, if this sensor goes bad, it can really throw things off. Your check engine light will definitely come on – you’ll notice if that happens. But it can also lead to poor fuel economy, and in some cases, even cause the engine to run rough or misfire. More seriously, a faulty sensor can cause the car to fail an emissions test. If it's reporting incorrect data, the computer can't make the necessary adjustments, and you could end up with a failing catalytic converter down the road, which is a much bigger – and more expensive – problem to fix. You can find these pretty easily online, even at places like Fixparts Online, but it's important to get the right one for your specific vehicle. They’re not one – size – fits – all, so make sure you have your make, model, and year handy when you’re looking. Environmentally conscious choice: NOx Sensor (MPN 06F907807B) comes with a 12-month warranty!

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