This little guy basically measures the temperature of your engine's coolant. It sends that information as an electrical signal to your car’s computer – we call that the Engine Control Unit or ECU. The ECU uses that temperature reading to adjust things like fuel injection and ignition timing. It also tells the cooling fan when to kick on, and even affects how the transmission shifts in some vehicles. Think of it as the engine’s thermometer. It's part of a closed – loop feedback system. The ECU needs to know how hot or cold the engine is to run everything correctly. Without an accurate reading, the computer is basically flying blind. It’s a pretty crucial piece for keeping everything balanced and running smoothly. A failing coolant temperature sensor can cause a whole host of issues. If it sends a false “cold” signal, the engine might run too rich – meaning it gets too much fuel – which can lead to poor gas mileage and potentially damage the catalytic converter. Conversely, if it sends a false “hot” signal, the engine could overheat. You’ll notice if that happens – steam coming from under the hood is a pretty clear sign! Plus, it can mess with your check engine light, causing it to come on unnecessarily. It’s one of those parts that’s relatively inexpensive to replace but can save you a lot of trouble down the road. You can often find a good replacement at places like Fixparts Online, and there are videos online that show how to install them, but if you’re not comfortable working on cars, it’s best left to a professional. Buy risk-free: Coolant Temperature Sensor (MPN 45396) is covered by a 3 year manufacturer guarantee!

About Febi

Ferdinand Bilstein is well known for reliability and is trusted by repair professionals worldwide.

Why Choose Febi?

• Febi parts are made to the same standards as original equipment, so you get reliable quality. • We offer a huge range of parts – from engine components to wear-and-tear items – covering many vehicle makes and models. • Febi has been a trusted name in the automotive industry for over 70 years, so you’re choosing a brand with a long history of performance. • You get a great balance of quality and price, meaning you don’t have to break the bank to keep your vehicle running smoothly. FixParts Online – Your Trusted Source for Quality Febi Auto Parts.