Ignition keys are popular features on vehicles around the world, and can be synced to a number of Volvo cars. The Volvo S40 features transponder key capabilities that allow you to control your engine electronically. Once programmed, only a programmed key can be used to start your car. You can sync the keys yourself in just seconds from your car's driver's seat.
Enter your car with your ignition key and turn it in the ignition to the "On" position.
Select the following options on your driver's information centre: "Language," "Vehicle Model," "Electrical," "Immobiliser" and "Program Immobiliser."
Select "Enter" and "Add Key."
Enter the four-digit programming code provided by the system installer and select "Enter" to code the key.
Select "Exit" to end the process and you will be able to use your newly programmed key.