The simplest way to find the headlight bulb you need is to go for the online bulb finder. It contains information about a large variety of bulbs required for different vehicles. So whether you need a jeep or a truck headlight, this service will be helpful. You only need to know the country where your vehicle has been manufactured, its manufacturer, and model. If your vehicle isn’t on the database, there are other ways. In particular, you can find out about the required headlight bulb in your vehicle handbook. You can also remove your headlights and inspect your existing bulb. If none of these methods were helpful, contact your vehicle’s manufacturer.