This little guy basically listens for engine knocking or pinging. That’s an uncontrolled combustion happening inside the engine. It's an electrical component, so it creates a voltage signal. The engine’s computer uses that signal to figure out if things are running smoothly, or if there’s a problem with how the fuel is burning. Think of it as an early warning system. The engine control unit – the computer – constantly monitors what the knock sensor is telling it. If it detects knocking, the computer will actually adjust the ignition timing to try and prevent further damage. It’s part of a feedback loop, constantly working to keep everything running as it should. It works alongside other sensors, like the oxygen sensor, to give the computer the full picture. Knocking can seriously damage your engine over time. It’s like tiny little explosions going on inside that weren’t supposed to happen, and they can wear down pistons, connecting rods, and even the crankshaft. The knock sensor lets the computer step in and correct the issue before that damage happens. You’ll notice if it’s failing because your engine might start running rough, lose power, or the check engine light will come on. Sometimes it’s a subtle issue, but best to deal with it. You can often find a replacement for a pretty good price online – places like Fixparts Online have them in stock, and it’s a relatively straightforward repair for a mechanic. Ignoring it could lead to much bigger, and more expensive, problems down the road. Built to last: Knock Sensor (MPN 0261231046) includes a 12-month warranty!

About Bosch

With a heritage of innovation, Bosch provides dependable and efficient automotive components that set industry standards.

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.