i have tried for 2 days now, and absolutely cannot even come close to budging the allen screw on the OEM sensor. i am actually to the point of breaking the wrench! i stopped today when pieces of the OEM sensor were breaking off around the head of the screw. the electrical connector came off ok. if it truly is this difficult to remove, im not going to proceed with the mod, because if i end up breaking off the head or breaking the stock one, then ive got a really large lawn ornament. any advice would be great! thanks a bunch!