Built-in load resistors for European Vehicles (canbus OBC Error Free ) such as Audi, BMW, Mercedes, Porsche, VW, and etc. These T10 Wedge LED bulbs will replace the stock 168, 194, 2825, 2821 or W5W bulbs. The length of this T10 LED bulb is approx 1.125 inches. Since this T10 LED bulb is slightly longer than the stock wedge tungsten bulb, you must make sure this T10 LED bulb can fit into the housing of your car lamp. Each LED bulb equips with 2 pieces High Power SMD LED ChipBMW, Audi, etc.