Autozone doesn't charge anything to replace your windshield wipers for you when you buy your windshield wipers from their store.
When you buy new windshield wiper blades from AutoZone you can ask them to help you install the wiper blades and they will install the wiper blades for free at no additional cost.
The cost of the wiper blades for your vehicle will depend on the make and model of vehicle, the size of the wiper blades etc.
In most cases no tools will be required to change the wiper blades.
Changing and replacing wiper blades takes around 5 to 10 minutes or less.
Other stores such as O'Reilly, Advanced Auto Parts, most other auto repair shops also replace wiper blades for free.
An auto shop might charge a small fee but it's often not that expensive.
Along with free wiper blade installation, O'Reilly Auto Parts also provides several other free store services, including free bulb installation, free Check Engine light testing, free alternator and starter testing, free battery testing, and free fluid and battery recycling.