|The main zipper wasn't working.|
We replaced the slide. Notice I saved the old pull tab to keep the logo.
If the teeth on your zipper are all there and none are missing, you most likely do not need a new zipper. All you need is a new slide. Over time slides wear out and do not pull the teeth together anymore. In the purse above, I replaced the slide, but saved the old tab and put it on the new slide, so she could save her logo.