I did mine today and it was a pretty simple process once I figured out how to get it out. The hardes part for me was figuring how to get it back in. I unhooked the electrical connection and inside door handle cable before removing the actuator from the door this made it easier to remove and put back in. I used a 5.5mm socket instead of the female T30 torx bit and it worked well.
Pretty simple DIY with the right tools.
2003 Silver Grey Mettalic M3 - 6 Speed 19" Gunmetal VMR VB3 - LED's Everywhere