It basically listens for pre – ignition, or “knock” – that’s an uncontrolled explosion in the cylinder before the spark plug fires at the right time. It’s a little microphone, really, that picks up those vibrations. It sends a signal to the engine control unit—the computer—telling it what’s going on inside the engine. It doesn’t fix the knock, it just reports it. Think of it as an early warning system. The engine computer uses the information from the knock sensor to adjust the ignition timing. If it detects knock, it retards the timing – delays the spark – to protect the engine. It’s part of a feedback loop; it’s constantly working with the computer to keep things running smoothly and efficiently. It helps prevent damage from detonation, which can really hurt an engine over time. Without a functioning knock sensor, the engine could experience serious internal damage. Detonation is like little hammers banging away inside the cylinders. You’ll notice if it’s gone bad because you might get a check engine light, and you could experience a loss of power or even rough running. Ignoring it can lead to expensive repairs down the road – things like piston damage or even a completely failed engine. They're fairly affordable to replace, and you can find them easily enough. A site like Fixparts Online has a good selection if you’re looking to do the job yourself. It's a small part that acts like a shield for a really expensive component – your engine. Your trust matters: Knock Sensor (MPN 0261231273) comes with 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, which can save you money on repairs in the future. • They’re a leading supplier to car manufacturers, so you’re getting the same quality parts used in many new vehicles. • Bosch invests a lot in research and development, meaning their parts often have the latest technology for better performance. • You can find Bosch parts for a wide range of vehicles, from older models to the newest cars and trucks. Bosch delivers excellence, FixParts Online delivers to your door.