I own a 1973 Datsun 610 station wagon (that was actually made in late 1972). Please see the photo below. All three sensors have almost the same dimensions (miniscule difference) but only the original sensor, that is now defective, actually fits into the threaded hole of the engine block. Does anyone know of a place to get a sensor that will fit into the engine block hole and if so, what the model number of that sensor is?
I was told on two separate occasions that the replacement sensors I purchased would fit, but they don't. The original sensor barely fits; it is almost too big to go in the hole.