Much like any other kind of battery, car batteries need replacing from time-to-time. However, it is not possible to simply replace a car battery with any old model, since every vehicle and every battery is different. You will need to check the dimensions of the space that your battery occupies before you buy a new one. It should be noted that different specifications of the standard 031 car battery are made for certain engines, so be sure to consult a specialist before you input your car details and buy one to replace yourself.