換完連續按四次Unlock~! 原廠的使用手冊就有寫 原文如下 Changing the remote-control battery When the battery voltage in the remote control falls below a predetermined level the SID will issue the following message: REPLACE KEY BATTERY. Press the CLEAR button on the SID to acknowledge this message. You must then replace the battery without delay to avoid malfunctions. The life of the battery is 4-5 years. After changing the battery you must press the unlocking button of the remote control four times (or until the door locks cycle) while the car is within the range of the remote control in order for the control module to recognize the remote.