Often the rear lights (LED) burn out due to the construction of the driver LEDs. It overheats and breaks down. And this board is not sold separately and manufacturers suggest to buy the entire taillight, which is very expensive. The used taillight can also burn out at any time. Just a constructive marriage of F25. Our chips fixed a constructive error and have a protection circuit against transient voltages. It is based on a microcircuit, which has minimal strapping and high efficiency, thus the board does not heat up. You will no longer convert energy into heat. Features:This Part Is Plug And Play (Does Not require any cutting and Soldering Like other Parts). This is an improved factory manufactured replacement LED driver. All 4 tail light drivers are the same.No errors, no interference.One driver fits either inner or outer light. Fitment:For X3 F25 2011-2017 with LEDs in rear tail light. Part Number: B003809.2 Input Voltage: 9-16V Max. Input Current: 6-8A Transient Starting Voltage: 32KV Output Voltage Waveform: Square Wave Frequency: 2510Hz Output Open Circuit Protection: 1S Output Short Circuit Protection: 1S Input Voltage Reverse Connection Protection: 1S Working Temperature: -40 Celsius~105 Celsius Working Life: 3000H Colour:Black Material:ABS Package Contents: 2pcs Rear tail light driver 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 +/- 1-3cm.