How do I open the passenger door on a Seat Ibiza if the remote and handles don't do anything?

If the remote and door handles are unresponsive, you can try manually unlocking the passenger door using the physical key if your Seat Ibiza has one. Check inside the driver's side for any interior door unlock buttons or switches that might work. If these options fail, consider accessing the vehicle through the driver's door and checking the fuse for the central locking system or consulting a professional locksmith for assistance.