This driver works better than the part number. LED power = brightness. No errors, no interference. Overvoltage protection. Consumes 3 less power. This part is Plug And Play (requires no cutting and soldering like other parts). This is an improved replacement LED driver board (LED chip) for 2011 to 2017 X3 inner and outer LED tail lights. This will replace faulty b003809.2 LED driver. FITS for ALL X3 F25 vehicles with tail lights. Condition: New. Other part number: b003809.2. Fitment type: Direct replacement. Placement on vehicle: Rear, left, right, inner, outer. Voltage: 12V. Power: 3W. Manufacturer part number: b003809.2 63217217305,63217217306,63217217309,63217217310,63217217311,63217217312,63217217313,63217217314. 100% Plug-n-Play: the driver has sockets. One driver fits either inner or outer light. Color: black. Material: Metal + Plastic. Package contents: 2 x LED tail light driver board. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.