Yes, there are some special requirements for using a convertible car seat in different vehicles. It is important to make sure that the car seat is installed correctly and securely in the vehicle. Some vehicles have different types of seat belts or LATCH anchors, so you need to make sure that the car seat is compatible with your vehicle. Additionally, some convertible car seats have adjustable recline angles, so you need to adjust the recline angle according to the vehicle's seat angle. Always read the car seat manufacturer's instructions carefully and make sure to follow them when installing the car seat.