If you have a stopover at Stockholm Arlanda and have baggage checked to your final destination, you don’t have to go through security screening again if you’re taking a bus transfer to your new terminal.
Board the bus at Terminal 4 – Gate 30D to travel to Terminals 2 and 5. Request the bus on the monitor at the gate. Check for disembarking gate on the monitor Connecting flights. The bus will arrive shortly. The bus goes in only one direction and is free.
You press the button on the bus transfer display. The bus arrives shortly after.