A car emergency kit contains supplies for breakdowns, crashes, winter weather, and getting stranded, with jumper cables, first-aid items, water, food, a blanket, and tools as the core items.
Most US drivers will face a breakdown, flat tire, or stranded situation at some point. The question of what is in a car emergency kit comes down to one principle: pack for the gap between the help you can call and the help that arrives. In freezing weather, that gap can be hours. The National Safety Council, Ready.gov, and AAA each publish checklists, and their lists overlap on the same core set of items.
To simplify things, think of the kit as five functional layers: power and startup, visibility and alerting, medical, food and water, and warmth plus recovery gear. The sections below cover each layer, plus how to store it all so the kit actually works when you need it.
The Five Core Layers of a Car Emergency Kit
Every reputable checklist—from the National Safety Council’s emergency supplies page to Ready.gov’s driving guidance—converges on the same five categories. Here is what each layer covers, with the specific items the major sources name.
Power and startup: jumper cables or a portable jump starter, plus a car phone charger. AAA explicitly notes a jump starter is the right pick when you cannot rely on another vehicle stopping to help with cables.
Visibility and alerting: reflective warning triangles, road flares, and a reflective vest. The California Highway Patrol also recommends a “HELP” sign at least 8 inches across.
Medical: a first-aid kit with bandages, gauze, tape, antiseptic, gloves, tweezers, scissors, and pain relievers.
Water and food: drinking water plus nonperishable, high-energy foods—nuts, dried fruit, granola bars, protein bars, or hard candy.
Warmth and recovery: a blanket, warm clothing, rain poncho, snow brush and ice scraper, shovel, and a traction aid like cat litter or sand.
Vehicle Repair and Recovery Items You Should Not Skip
Tire trouble is the most common roadside issue, so the repair layer deserves its own section. The National Safety Council’s list names a spare tire, wheel wrench, and tripod jack specifically—the tripod style is sturdier than the scissors jack most cars ship with.
Beyond the spare, keep these in the trunk:
- Tire gauge, tire repair kit or inflator
- Basic tool kit (screwdrivers, pliers, adjustable wrench)
- Duct tape and cable ties
- Spare fuses (match the rating of what your car uses)
- Tow strap or rope—the California Highway Patrol specifies nylon rope at least 12 feet long
- A small fire extinguisher. AAA recommends Class B or C for vehicle fires; the California Highway Patrol specifies an ABC-rated unit. Both agree one belongs in the car.
Some drivers add a window breaker and seatbelt cutter kept within reach—a smart safety add-on, though not universal on official checklists.
How Much Food and Water Should You Pack?
The stocking benchmark across sources is one gallon of water per person per day, for three days. AAA uses this figure, and California’s Escondido checklist states it as a minimum for family kits. One gallon per person per day covers drinking plus basic hygiene. If space is tight, the lower bound is at least one liter of water per person.
For food, prioritize shelf-stable, calorie-dense options that survive heat and cold in a trunk. Nuts, dried fruit, granola bars, and protein bars all fit the bill. Hard candy is a smart addition—it provides quick sugar and can help morale during a long wait.
Both bottled water and energy bars expire. The California Highway Patrol recommends replacing them yearly. Put a reminder in your phone for annual kit maintenance.
Where to Store Everything (AAA’s Split System)
AAA’s guidance is the most practical on storage: keep small, frequently needed items in the glove compartment and bulky gear in the trunk. This split matters because a kit buried under luggage is useless in a quick-stop situation.
Glove compartment: masks, wipes or sanitizer, a battery-powered phone charger, pen and notepad, tire gauge, paper maps, and a flashlight.
Trunk: first-aid kit, warning triangles or flares, reflective vest, jumper cables or jump starter, jack and lug wrench, fluids, water, snacks, blanket, rain poncho, sturdy shoes, tool kit, extra batteries, duct tape, cable ties, fuses, a hand-crank radio, and a lighter or matchbook.
For winter driving, add the snow-specific items to the trunk: ice scraper, snow brush, shovel, traction material, and extra warm clothing. Ready.gov’s car guidance lists cat litter or sand for traction, and the National Safety Council adds washer fluid to the winter list.
AAA also recommends checking tire pressure monthly—a tire gauge in the glove box makes that a two-minute stop rather than a trip to a gas station.
If you’re looking to buy a ready-made kit rather than assembling one piece by piece, our tested roundup of the best emergency kits for cars covers top-rated options for every budget. Pre-made kits are convenient, but the sources all agree: customize whatever you buy to your vehicle, your climate, and the routes you drive.
| Storage Location | Items | Best For |
|---|---|---|
| Glove compartment | Phone charger, flashlight, tire gauge, pen/notepad, maps, masks, wipes | Quick access during stops and minor issues |
| Trunk (bulky gear) | Jumper cables, first-aid kit, triangles, blanket, tools, water, food | Breakdowns, crashes, and longer waits |
| Winter add-ons (trunk) | Ice scraper, snow brush, shovel, cat litter/sand, warm clothing | Cold-weather states and winter road trips |
FAQs
How often should I replace the water and food in my car kit?
The California Highway Patrol recommends replacing bottled water and energy bars yearly. Set a calendar reminder so the kit is checked on a schedule—expired supplies are the most common reason kits fail when needed.
Is a jump starter better than jumper cables?
AAA notes a jump starter is the right choice when you cannot rely on another vehicle stopping to help. Cables are lighter and cheaper, but a jump starter works solo. Many drivers carry both, with the jump starter doubling as a phone charger.
Should I store the kit in the trunk or the cabin?
AAA recommends splitting items: keep small essentials like the phone charger, flashlight, and tire gauge in the glove compartment, and bulky gear like cables, blankets, and tools in the trunk. A kit buried under cargo is hard to reach in a quick-stop situation.
References & Sources
- National Safety Council. “Emergency Supplies for Car.” Core checklist including tripod jack, reflective triangles, and winter gear.
- Ready.gov. “Car Safety.” FEMA-backed guidance on jumper cables, flares, ice scraper, and traction material.
- American Red Cross. “Car Emergency Kit: What to Include.” Overview of core supplies and customization advice.