What Are the Reasons Why a Spare Key Cannot Unlock the Car Door?
1 Answers
There are several reasons why a spare key might fail to unlock the car door, including remote lock failure, magnetic signal interference, and a dead battery in the spare key. Below are detailed explanations: 1. Remote lock failure: If the spare key cannot unlock the door, it is likely due to remote lock malfunction or factors such as aging of the car's remote transmitter antenna, which may render the remote key ineffective. 2. Magnetic signal interference: Another possibility is strong magnetic signal interference around the car. Since smart keys use low-intensity radio waves, they may not function properly under magnetic interference. 3. Dead battery in the spare key: Remote keys typically use coin cell batteries, which may not be readily available in convenience stores. If there are auto parts stores or 4S shops nearby, these places usually carry them. Car owners can also purchase some online for emergency use.