Fuelmiser Air Temp Sensor - Gives an accurate reading for intake air temperature Modern cars are fitted an air temperature sensor which measures IATs or intake air temperature. With the information, the ECU is able to estimate air density and add the correct amount of fuel to properly balance the engines air/fuel ratio. Typically, colder air is more dense than hot air so requires more fuel than hot air in order to minting the correct air/fuel mixture. When it comes to engine management, Fuelmiser have a comprehensive range of quality switches and sensors sourced from world leading manufacturers. With most popular late model applications considered in their comprehensive range, just some of the switches and sensors that Fuelmiser offers include: Camshaft sensors Thermo fan switches Knock sensors Crankshaft sensors If you're shopping for a quality replacement sensor or switch to get your car running at 100% again, look no further than Fuelmiser. Gone are the days of carburettors and points ignition, when it comes to running modern cars pretty much everything is electronically calculated, adjusted, transmitted and actuated by your ECU (Engine Control Unit) or ECM (Engine Control Module). Whilst the ECU is able to do all the clever calculations and literally operate your car, it relies on a myriad of switches and sensors to transmit all of the necessary information it requires in order to allow the ECU to do its job including oil pressure, fuel pressure, coolant temperature, A/C pressure, power steering pressure and even fuel temperature. Behaving as your car's nervous system, faults in automotive switches or sensors can cause issues such as a lack of power, poor efficiency, overheating, internal engine damage or a car that won't run, start or idle at all. Whilst your switches and sensors will take care of engine vitals such as oil pressure indication, coolant temperature and oil temperature, various switches and sensors also allow the operation of some of the extra features you wouldn't want to be without including air conditioning systems, electric windows and even interior lights. Subjected to harsh under-bonnet conditions and tough road use, just like other components of your car, old switches and sensors can fail over time and give incorrect data or no data at all to the ECU. Often these issues will flag up a check engine light on the car which is handy if you have a code reader, however sometimes the issue will remain a mystery. By testing for continuity, voltage and resistance, you can confirm the issue and get stuck into fitting a replacement sensor. By fitting quality replacement switches and sensors to your car, you can drive with the confidence that your car will run to its maximum potential in terms of power, efficiency and longevity and that all of your car's features will continue to operate correctly for time to come.