There is no sensor that controls top speed. On computer controlled vehicles, the speed sensor sends input to the computer and the top speed is limited by the computer (pcm, ecu, whatever the manufacturer refers to it as). It is a preset value programed in but can be changed with reprogramming but on most cars the limited top speed is not much below the top speed the vehicle is capable of due to final drive gearing and maximum engine operating RPM, with very few exceptions usually being high performance high horsepower models.
cam or crank sensor
I'm not positive about this particular car, but on most cars the speed sensor screws into the transmission.
There are two speed sensors on the car. The output speed sensor is located on the transmission near the middle of the car. To get to it, the car must be lifted, either by jacks or a hydraulic lift at an auto shop. The sensor is basically under the center console of the car.
yes
The speedometer.
A sensor in the transmission, measures the output shaft speed.
Vehicle speed sensor is located on top of the differential on the transmission. Access is from under the car
Crank and cam sensors, yes. Vehicle speed sensor, no.
It means your car is broken
the speed sensor '''MUST''' match the transmission, simply because the transmition is the one providing the speed info.(most are color coded and splined)
inside the transmission
I reckon it is for aerodynamics so the car can have more speed and stay on the track.