Filmed this using my iPhone 5. Pretty hard to find if you don't know where to look. From above, there's just enough room for you to have line of sight of the whole sensor (amidst the intake manifold, and tubes), you just have to use a flashlight. I plan to DIY replacing it. Remove using 10mm socket wrench. Part # 23731-6N21A Casa price is P2,472, but it seems you can't order without buying the camshaft sensor as well which is the same part. Symptoms of a Bad Crankshaft Sensor: Acceleration Problems A crankshaft sensor is responsible for monitoring the rotation of the crankshaft. If the sensor is awry it will send the wrong information into your car's on-board computer resulting to the inability of your engine operating system to sync the engine pistons together. This results in poor acceleration and the inability of your car to maintain constant speed. Engine Sputter Since the information relayed by the crankshaft sensor into your car's on-board computer is used to determine the proper spark timing, a bad crankshaft sensor will relay wrong readings into the computer affecting the fuel injection process causing your car engine to sputter. Increased Fuel Consumption Incorrect crankshaft sensor readings leading to spark timing and fuel injection errors does not only cause engine sputter but will also affect the fuel efficiency of your car. Have your car checked for crankshaft sensor problems when it takes you four gallons of gasoline to get from your home to the office instead of the usual two gallons. Engine Stall If your engine stalls at low speeds and you have difficulty in starting your car engine then your car is most likely having crankshaft sensor problems. This is because the crankshaft sensor is responsible for ignition timing.