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. Bosch quality assured: Knock Sensor (MPN 0261231172) includes a 12-month warranty!

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 lasting a long time, so you won't have to replace them often. • They're made with high-quality materials and tested thoroughly, meaning they perform reliably. • Bosch offers a wide range of parts, so you're likely to find what you need for almost any vehicle. • Mechanics and drivers around the world trust Bosch – it’s a name you can depend on. Performance you can rely on – Bosch parts from FixParts Online.