A solid roadside emergency kit costs roughly $40-$100 to assemble yourself, or $60-$150 for a pre-made kit, and should cover jump-starting, tire problems, visibility, and basic first aid at minimum. Core items: a portable jump starter or jumper cables, a tire inflator or sealant, a flashlight, reflective triangles or flares, a basic first-aid kit, water, a blanket, and a phone charger.
At a glance
| Item | Why you need it |
|---|---|
| Portable jump starter or jumper cables | Dead batteries are one of the most common roadside calls |
| Tire inflator or sealant | Handles a slow leak or minor puncture without a tow |
| Flashlight/headlamp + extra batteries | For nighttime repairs and being seen |
| Reflective triangles or road flares | Warns approaching traffic you're stopped |
| First-aid kit, water, blanket | Basic safety and comfort if help takes a while |
Essentials everyone needs
- Portable jump starter (no second car needed) or a set of jumper cables.
- Tire inflator/compressor or a can of tire sealant for a slow leak.
- Flashlight or headlamp with extra batteries.
- Reflective warning triangles or road flares to alert other drivers.
- Basic first-aid kit.
- Bottled water and a few non-perishable snacks.
- A phone charger, ideally a small battery pack that doesn't depend on the car's power.
- Work gloves and a basic multi-tool.
Winter-specific additions
- An ice scraper and small snow shovel.
- A warm blanket or emergency thermal blanket.
- Sand, cat litter, or traction mats for icy tire grip.
- Extra warm clothing/hand warmers, especially for rural or highway driving.
Summer-specific additions
- Extra water — more than you think you'll need, especially in hot climates.
- Sunscreen and a hat if you might be outside the car for a while.
- Coolant or a sealant for minor cooling-system leaks.
If you drive rural or remote roads
Add a paper map or downloaded offline maps in case of no cell signal, a whistle or signaling mirror, a few days of extra water and shelf-stable food if you frequently drive in areas with sparse traffic, and consider a satellite communicator or emergency beacon if you regularly travel where cell coverage is unreliable.
Where to store it and maintenance
Keep the kit in the trunk in a sturdy, easily accessible bag or bin, not buried under other cargo. Check it roughly twice a year: confirm the jump starter still holds a charge, replace expired first-aid items, and swap out water bottles before they degrade. A kit that's never checked is easy to forget until the moment it's needed and something inside has failed.
Building it on a budget
You don't need every item at once. Start with the highest-value basics — a jump starter, tire inflator, flashlight, and warning triangle — which cover the most common roadside scenarios, then add the rest over time. Many of these items overlap with general home emergency supplies, so check what you already own before buying duplicates.
Pre-made kits vs building your own
A pre-made roadside kit is a reasonable starting point and usually covers the basics in one purchase, but check the contents list carefully — some budget kits skip a jump starter or tire inflator, the two most commonly needed items. Building your own from individually chosen components often gets you better quality per item for a similar total price.
Frequently asked questions
What should be in a car emergency kit?
Do I need flares if I have a warning triangle?
How often should I check my roadside kit?
Is a portable jump starter better than jumper cables?
What's the most important item in an emergency kit?
Sources & further reading
Figures, prices and policy details were current at the last-updated date above. Automotive pricing, incentives and regulations change frequently — verify time-sensitive details with the linked primary sources. Read our editorial policy and fact-checking standards.
