Here is a general overview of the steps involved in replacing a crank sensor:
1. Locate the crank sensor. The crank sensor is usually located near the bottom of the engine, towards the front. It's usually held in place by a bolt or two.
2. Disconnect the electrical connector. Once you have located the crank sensor, disconnect the electrical connector by pressing the release tab and pulling the connector straight up.
3. Remove the bolt(s) holding the crank sensor in place. Use a wrench to loosen the bolt(s) and then remove it by hand.
4. Carefully remove the old crank sensor. Be careful not to drop the crank sensor into the engine.
5. Install the new crank sensor. Place the new crank sensor into the hole and align the bolt holes.
6. Re-install the bolt(s). Thread the bolt(s) back into the holes and tighten until snug.
7. Re-connect the electrical connector. Push the connector back onto the crank sensor until it clicks into place.
8. Start the engine and check for leaks. Start the engine and allow it to warm up to normal operating temperature. Check for leaks around the crank sensor. If there are any leaks, tighten the bolts until they stop.