How To Replace Crank Sensor 1990 Saab

The crank position sensor can be found in the front of the crank on the engine block below or next to the water pump in many applications. It can also be located on the main crank pully or the flywheel. The orientation of each make and model's engine is different, so the position sensor could be near your fender or near your front bumper depending on the car. They are typically made of magnets and oil and work on the principles of the Hall Effect.
You can replace your crankshaft position sensor. The first thing you need to do is figure out how your engine block is placed in the engine compartment. Is it placed in there long ways where the front of the motor is near your bumper, or is it inverted as to where the front of the motor faces your drive or passenger side fender? Once you figure that out, then jack the car up, go near the water pump at the front of the car, and remove components that block access to the sensor. This may include removing parts like the water pump which could be in the way. Once accessible, remove the two bolts holding the sensor into place, remove the wires that send the data, and place in the new part. Replace the other parts as necessary when you are finished. Be sure to test the car to make sure it's working and running smoothly. Before getting started, it's a good idea to consult your owner's manual or speak with a local factory dealership for advice.