a crankshaft sensor monitors the rotational speed of the crankshaft of a vehicle and sends the information to the vehicle's computer. Depending on the data received from the crankshaft sensor, the car then adjusts its fuel delivery and spark timing. A bad crankshaft sensor must be avoided at all costs. It can affect the speed of your engine and the fuel efficiency of your car. Crankshaft sensors are also responsible for the emission performance, reliability and drivability of your car. A crankshaft sensor consists of the rotating and static part. A bad crankshaft sensor is the first sign of engine failure. If you want to stay safe and take a look at the crankshafts we have, visit eWorldTrade.com. Our collection is huge and our manufacturers are from all around the world, countries such as China, the USA and India so you can be sure that you are getting the best there is out there. For information about the product, you can contact the manufacturer directly and for feedback, our customer support is always available. We are always looking to enhance our services, so any feedback would be of great help.