I have read about buying certain auto parts from Amazon, EBay and the like, where at times some of the oem parts are not genuine…. I recently ordered an Aisin water pump for my daughter’s RAV4 through Amazon a received one where some markings appear to be removed, why would the vendor (or whomever) do this? There are also a few slight differences in the pump that came off the car and the new one. Could it be the pump is interchangeable with another brand of car, like Nissan, etc and that is what was etched off?