HI Mike.
Drill down the centre with a 3mm drill about 15mm then screw in a self taper with flat head you will then have a chance to pry it out with a pry bar or claw hammer.
Clean any dirt and rust around then sensor before hand, also hoover any debris as you drill good luck
Arctic
Pete be me to it
PS as above slice off the little tags to help refitting easy smear of copper slip but not at the business end of the sensor, the bolt will hold it steady after fitting.
