You build this kit hoping to never open it. Stock the trunk with this checklist once, refresh it each season, and every breakdown becomes an inconvenience instead of a crisis.
Jumper cables, a real spare with a jack, first aid, water, a flashlight and a charged power bank. This list adds winter extras you can pull out each spring.
How often should I check the kit?
Twice a year — check the spare’s pressure, swap expired snacks and water, recharge the power bank. Reset this checklist each season.