Outside of the fact that the unit is buried behind the alternator and not wrench friendly, my bolt heads were rusted beyond use. This would require the removal of the lower intake in order to to attempt the removal of the unit. Ultimately one bolt would snap, The other two bolts came out heat and oil, but only after breaking the unit off the bolts, so I could use vise grips on the bolts.
Note there are only three bolts. The lower two are also grounds (verify the vehicle ground to manifold located at #4 cyl on manifold is good). Clean the backing plate well before installing a new unit. Note which plug is UP. Use anti seize compound on the bolts. Use heat compound or di-electric grease under the module required for heat transfer.
TIP2: Use a tap to clean the threads before installing bolts. If they break off during removal, you may need to remove the manifold.
TIP3: Remove the sensor from the manifold located in the tube to #1 cylinder. This is often choked with crap from the EGR system. Clean with a blast of carb cleaner and reuse.
