This little guy basically reads where the crankshaft is in its rotation. It’s a magnetic sensor, so it picks up on teeth or notches on the crankshaft or flywheel. It sends that information – the position and speed – as an electrical signal back to the engine control unit, or ECU. It tells the computer exactly which cylinder is ready to fire, and when. It's not just about position, it's about timing everything perfectly. Think of it as a key piece in starting and running your engine. When you turn the key, the ECU uses the signal from this sensor to figure out when to fire the spark plugs and inject fuel. While the engine is running, it constantly monitors the crankshaft position, sending updates multiple times per second. It works with other sensors, like the camshaft position sensor, to give the ECU a complete picture of what’s happening inside the engine. It helps manage things like ignition timing, fuel injection, and even variable valve timing if your car has that. Without a working phase sensor, your engine won’t run reliably, or might not run at all. You’ll likely notice if it’s going bad with a rough idle, stalling, a check engine light, and sometimes a loss of power. It acts like a shield protecting the engine from running at the wrong time which can cause serious damage. A faulty sensor can even prevent the engine from starting. Luckily, it’s a fairly common part to replace, and you can find them readily available. We carry a good selection at Fixparts Online, and it’s something a decent DIY mechanic can usually tackle. Drivers trust Bosch: Phase Sensor (MPN 0232103124) 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, 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.