pmcmssr

Would like to inquire about the diameter of abs wheel speed sensor for toyotas' 2004 and 2006 models. I have a replacement sensor. It is 17mm in diameter. the hole where it fits into on the steering knuckle is 16.6mm. The old sensor is about 16.6mm give or take .08mm. Is it possible I have a different make of speed sensor. Could it be for a later year or Pre-runner of 4X4? Thanks frank