The CKP sensor or the Engine Speed Sensor is located on the front left (drivers) end of the engine block, near the transmission bellhousing (1.4L, 1.8L, and 2.0L engines). In the case of 1.4L, you need to lift the vehicle and place it on jackstands after which you will have to remove the engine undercover. Where necessary, remove the bolt that holds the charge air cooler pump bracket then relocate the pump. Unscrew the electrical connector of the CKP sensor, peel off the rubber seal of the engine block and unscrew the bolt and pull out the sensor. Check the O-ring whether it is damaged or not and change it in case of need, otherwise, remove and place again in the same way in reverse order. In the case of 1.8L and 2.0L engines, take the same steps, such as the removal of the engine under cover and, in turbocharged engines, unconnecting the charge air pipe in order to access it. Unscrew the electrical connector to the CKP sensor, loosen the mounting screw, and pull out the sensor including the O-ring and examine it. In the case of 2.5L engines, the right-front wheel bolts should be loosened, the vehicle raised and the right-front wheel taken off. The under-vehicle splash shield must be removed, the CKP sensor should be found in an area close to the flywheel, and the electrical connector should be disconnected and the mounting fasteners should be removed to remove the sensor making sure to replace in their correct sequence.