1. About car anti-theft decoding matching:If ECU is installed, it can not be started. check if car is with anti-theft function or whether key has a chip.If your car is with anti-theft function, it is necessary to decode match (with decoder) successfully, then car can start normally. 2. About installation:Please find a professional auto repairman to install, and check voltage on vehicle before installation. When installing, plug in plug for test run, make sure there is no problem, and then fix screw. Note: before installing a new product, check and find out cause of broken of previous original computer board to avoid burning computer board again with same fault. During installation, check whether voltage and circuit are normal and whether grounding is good. The normal voltage of computer board is 12V. Do not install when voltage is higher than normal voltage, otherwise computer board may be burned. fit For S72 ME17.9.11.1 Colour:Silver&Black Material:Metal + Plastic Package Contents: 1 x Car ECU Engine Computer Board Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.