This little guy basically monitors things like temperature or pressure – often coolant temperature, but it can be for oil or even turbo boost in some vehicles. It doesn’t do anything physically, it just reports information. It sends a signal to your car’s computer – we call that the ECM or engine control module – telling it what’s going on with that specific system. Think of it like a messenger. It doesn’t fix the problem, it just tells someone there is a problem, or that conditions have changed. It's part of a closed – loop feedback system. The computer uses that information to adjust how the engine runs. For example, if it’s a coolant temperature sensor, the computer will use that reading to decide how much fuel to inject and when to activate the cooling fan. Without an accurate reading from this sensor, the computer is kinda flying blind. It's usually located somewhere on the engine block or near the radiator, but the exact location varies. You can find diagrams online showing specific locations for your vehicle. We’ve got a good selection of these at Fixparts Online if you’re looking for one. It’s important because an inaccurate reading can lead to a whole bunch of issues. You might get poor fuel economy, the engine could overheat, or it could run too rich or too lean. You’ll notice if it's failing usually because the temperature gauge on your dash will start acting strangely, or the check engine light will come on. It acts like a shield, protecting the engine from running in conditions it shouldn't. Ignoring a bad sensor can cause much bigger, more expensive problems down the road. It’s a relatively inexpensive part to replace, and can save you a lot of headaches. Secure your purchase: Switch Sensor (MPN TSW57) includes a 12-month warranty!

About MAHLE

Mahle is a leading German supplier of engine components and thermal management solutions, celebrated for its technological innovation. Based in Germany, Mahle drives advancements in automotive efficiency and sustainability.

Why Choose MAHLE?

• MAHLE parts are built to last, using high-quality materials and advanced engineering so you get reliable performance for years to come. • We make a huge range of parts, from engine components to filters and HVAC systems, meaning you can get almost everything you need from one trusted brand. • MAHLE is an original equipment supplier to many major car manufacturers, so you know our aftermarket parts meet the same tough standards. • We’re constantly innovating to improve our parts and develop new technologies, keeping your vehicle running efficiently and smoothly. MAHLE delivers excellence, FixParts Online delivers to your door.