Here is an detailed tutorial on how to replace a zipper.
How to Fix a Zipper
How To Replace a Zipper in a Jacket
Zipper Repair Kit, Upgraded Zipper Replacement Slider Kit (99 PCS), Include Zipper Pull Replacement, Instant Zipper Plier, Easy Install, Zipper Fix Kit for Jacket Backpack Luggage (3 Sizes: #3, 5, 8)
How to Replace a Zipper on a Jacket Like a Professional
uxcell 10 Sets Double Open Zipper Repair Latch Kits, 5 Insert Pins for Jacket Coat Two-Way Separating Zippers, Silver Tone
How to replace a zipper
Zipper - iFixit
How To Replace the Zipper on Your Favorite Jacket
How to replace a zipper
Schöffel Easy Jacket Zipper Replacement - iFixit Repair Guide