OSRAM is the number 1 automotive bulb manufacturer in the world, supplying automotive light bulbs to vehicle manufacturers of new cars, bikes and trucks. The OSRAM ULTRA LIFE bulb range provides up to three times longer lifetime than a standard OE (Original Equipment) bulb and the headlight bulb types in the range come with a unique OSRAM Guarantee. These durable, long life original equipment quality bulbs are the ideal solution if you spend a lot of time driving with your headlights on for long periods of time day and night; or if you have a vehicle where bulb replacements are difficult. The ULTRA LIFE range includes the most popular headlight types and some of the most popular auxiliary types. Please refer to the OSRAM website for more details about the OSRAM Guarantee. We advise that you check your handbook to ensure that you have identified the correct bulb for your vehicle. Alternatively please use the OSRAM online application guide. System Requirements Bulb Type: P21/ 5W Quality: D Rated Power [W]: 21 / 5 Socket Version: BAY15d Voltage [V]: 12