This little guy basically measures how hot your engine is. It’s constantly checking the temperature of the coolant – that’s the fluid running through your engine to keep it from overheating. It then sends that temperature reading as an electrical signal to your car’s computer. The computer uses that information for a bunch of stuff. It adjusts how much fuel the engine gets, it controls the cooling fan to turn on or off when needed, and it even tells the computer when to adjust the engine timing. It's a key piece of the puzzle for keeping everything running smoothly and efficiently. Think of it as the engine's thermometer, reporting back to central command. If this sensor goes bad, it can cause a lot of problems. The computer gets inaccurate information, so it might think the engine is colder or hotter than it really is. That can lead to poor fuel economy, rough idling, hard starting, or even engine damage if it's consistently misreading and not kicking on the cooling fan when it should. You’ll notice if it’s really off – things might run really rich and sluggish, or the fan might stay on all the time, even when it’s cold. It’s a relatively inexpensive part to replace, and addressing it early can save you from bigger, more costly repairs down the road. We often have these in stock at Fixparts Online, and they're usually a pretty straightforward DIY job if you're comfortable working on cars. Shop with confidence: Coolant Temperature Sensor (MPN 45443) comes with 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 know they'll fit and work well. • We offer a really wide range of parts – everything from engine components to wear and tear items – so you can find almost anything you need in one place. • Febi has been around for over 75 years, so we have a lot of experience and a reputation for quality. • Our prices are competitive, giving you great value for reliable parts. Febi – trusted quality, available at FixParts Online!