I did 900 km with the Kia sensor before putting the original back, I just received two more to try to integrate my O-ring like the original one, I also received the Mercedes Smart sensor which did not no need to be reduced in diameter and which is 3.9 mm longer and the length of the fixing center distance is different from 4 mm and could be mounted with an O-ring which fits with the conical inlet of the crankcase. I'm still waiting for electrical connectors the diameter of the Mercedes is 14.9 mm, it is 3.8 mm longer and the mounting distance is 4 mm shorter.