These little guys measure the amount of unburned oxygen leaving your engine. Basically, they’re constantly checking what’s coming out of the exhaust. They send that information back to your car’s computer – the engine control unit, or ECU – as an electrical signal. Different sensors will read before or after the catalytic converter, and that changes what they’re checking for. Think of it like this: the ECU is trying to get the perfect fuel – air mixture for your engine to run efficiently. The oxygen sensor is its eyes and ears. It's telling the computer “Hey, there’s too much oxygen, lean it out a bit,” or “Not enough oxygen, add a little fuel.” It's a closed – loop system, so it's constantly adjusting to keep things running smoothly. There are usually multiple oxygen sensors in most modern vehicles – one before the catalytic converter and then at least one after. If an oxygen sensor goes bad, the ECU gets inaccurate information. This throws off the fuel mixture, and you’ll notice if that happens. Typically, you'll see a drop in gas mileage, rough idling, or even a failing emissions test. Sometimes it might even trigger your check engine light. A bad sensor can also potentially damage your catalytic converter over time, which is a much more expensive repair. We carry a good selection of these at Fixparts Online, and it's often something a good DIY mechanic can handle, but if you're not comfortable, definitely have a professional take a look. They really are key to keeping everything balanced and running right. Customer-approved reliability: Oxygen Sensor (MPN DOX1000) includes a 12-month warranty!

About DENSO

Denso is a leading global supplier of automotive components, providing advanced systems for thermal, powertrain, and electrification.

Why Choose DENSO?

• DENSO parts are known for being really reliable. They’re made to last, so you won’t be replacing them again soon. • We make parts for almost every type of car, from older models to the latest ones. Finding the right part is easy. • Many car companies actually use DENSO parts when they *build* their cars. You’re getting the same quality in your repairs. • We don’t just make a few parts – we make a huge range, including things like spark plugs, fuel pumps, and air conditioning parts. You can get most of what you need from one place. FixParts Online – Your Trusted Source for Quality DENSO Auto Parts.