Q: A second-hand BMW X3, the engine fault light is on. When I went to the 4S shop for repair, the 4S shop technician said that the car system had been replaced, and the 17-digit code was inconsistent with the body and license code. Therefore, it cannot be repaired unless the system is restored, but the risk is very high. How to solve this problem?
A: According to the description in the question, it may be because the car key was made in an informal place. It is necessary to re-make the car key or replace the chip to restore the original car’s 17-digit code.