This sensor basically watches where the crankshaft is in its rotation. It’s a magnetic sensor, so it doesn’t have any moving parts that wear out quickly. It sends a signal to the engine control unit – that’s the computer that runs your engine – telling it the speed and position of the crankshaft. It’s constantly sending this information, many times per revolution. Think of it as a key piece of the puzzle for timing everything right. The computer uses that information, combined with signals from other sensors, to figure out when to fire the spark plugs and inject fuel. It's vital for combustion. Without an accurate reading from this sensor, the engine won’t know when to do those things, and you'll have problems. It works with the fuel injectors and ignition system. If this sensor fails, or even starts to drift out of spec, your engine might run rough, have trouble starting, or even not start at all. You’ll notice if it’s bad – usually a really shaky idle, or the engine might just cut out. Sometimes it can throw a check engine light, and a scan tool will point right to it. It acts like a shield protecting your engine from misfires. It's a relatively inexpensive part, and honestly, replacing it before it completely fails can save you a lot of headaches and potentially more expensive repairs down the line. We have a good selection of these at Fixparts Online, if you're looking to order one. Dedicated support: Sensor (MPN 07D906433) includes a 12-month warranty!

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