These little guys actually measure the amount of oxygen left over after combustion in your engine. They send that information to the car’s computer – the engine control unit, or ECU – so it can figure out if the engine is running lean (too much air, not enough fuel) or rich (too much fuel, not enough air). It's a feedback system, constantly adjusting things to keep everything running smoothly. There are usually multiple sensors – one before the catalytic converter, and one after, to check the converter is doing its job too. Think of it like this: the ECU is the brain, and the oxygen sensor is giving it vital information about what's happening in the engine. The ECU uses that info to fine – tune the fuel mixture. It directly affects how efficiently your engine runs, and how clean the exhaust is. A healthy oxygen sensor is key to hitting those emissions standards. If an oxygen sensor fails, your car's fuel economy will likely drop. You might notice your car struggling to accelerate, or idling roughly. The check engine light will almost certainly come on – it's usually one of the first things that triggers it. A bad sensor can even damage your catalytic converter over time, which is a much more expensive repair. They don't last forever, and eventually they just get slow to respond or inaccurate. Fixparts Online has a pretty good selection of these, and replacing them is often a straightforward job, though sometimes they can be a little tricky to get to because of where they’re located in the exhaust system. You’ll notice if one goes bad, usually with a drop in gas mileage and that engine light. Get more for your money: Oxygen Sensor (MPN 0258986615) is covered for 12 months!

About Bosch

Bosch is a global leader in automotive technology from Germany, celebrated for its innovative products and high-quality components. Based in Germany, Bosch drives advancements in vehicle safety and efficiency worldwide.

Why Choose Bosch?

• Bosch parts are known for being reliable and lasting a long time, saving you money in the long run. • They work well right out of the box, so you can get back on the road quickly and easily. • Bosch invests a lot in research and development, meaning they’re always improving their parts with the latest technology. • Whether you drive a newer car or an older one, Bosch has a wide range of parts to fit your vehicle. Bosch delivers excellence, FixParts Online delivers to your door.