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When you get the head off. Look down on the back of the motor. Oil sending unit is center upper block, Crank sensor is center lower block. Nothing else back there except the module and coils. The Oil unit screws with a large wrench or special socket. The Crank sensor has a single bolt and a little bracket. You undo the bolt and the bracket comes off, then use a flat screwdriver to lever it out. If you get the replacements you can look at them first to see what they look like.