As a thumb of rule, there is not a universal Magnetic drain plug that works well for all vehicles. The oil drain plug is nothing but a special bolt. Every fuel vehicle comes with its oil plug installed. In daily use, we remove the plug, drain the oil, and put the plug back. Once it is damaged or lost, there is a pretty high chance you need to replace it. Finding out what size of oil drain plug fits your vehicle is a crucial step in replacing it. It is not too difficult to measure the size if you get the right tools. Generally, oil drain plugs do only come in a couple of sizes. A given car maker would generally use the same size plug in all their cars, it’s cheaper and easier that way. Some oil plugs are marked with sizes on the surface, like M12x1.5, M14x1.5… You can also figure it out on the Internet. When neither of these works, it is better to measure on your own. So, let’s start, the first step is simply locating the drain plug and taking it out.