My 2008 Altima has crashed. Replacing the door lock cylinder. Part 9 

I was reluctant to do this, but at least I pulled out the lock cylinder from my original driver's side door. But the more I thought about it, the more I thought I should replace the current lock cylinder so at least my key would work on the new door. The battery is going to die some day, right? So this is an important step, but be forewarned, it's not easy, at least it wasn't for me.
Part 10: • My 2008 Altima has cra...