Basic Car Emergency Kit — What to Keep in Your Trunk

Nobody plans to break down on the side of a highway. But breakdowns, flat tires, dead batteries, and getting stuck in weather happen to millions of drivers every year. The difference between a 15-minute inconvenience and a multi-hour ordeal often comes down to what you have in your trunk.

This guide covers what to carry, organized by priority. Start with the essentials and build from there. You don't need to spend $200 all at once — a $50 kit covers the most common situations.

Tier 1: The Essentials ($30-50)

These items handle the most common roadside problems: dead batteries, flat tires, and being seen in the dark.

• Portable jump starter ($40-70): This is the single most useful item you can carry. Modern lithium jump starters are the size of a paperback book and can start a car 10-20 times on a single charge. No need to flag down a stranger or wait for roadside assistance. Many also double as a USB power bank for charging phones. Charge it every 3-6 months.
• Tire pressure gauge ($8-12): A digital gauge is more accurate and easier to read than pencil-style gauges. Check your tires monthly and before any trip.
• Flashlight ($10-20): A decent LED flashlight with fresh batteries. Your phone's flashlight works in a pinch, but drains your phone battery when you might need it for calls. A headlamp is even better — it keeps your hands free.
• Reflective warning triangles ($10-15): Set these behind your car if you're stopped on the shoulder. They're far more visible than hazard lights alone, especially at night or in curves. A pack of three is standard.
• Basic first aid kit ($10-15): Bandages, gauze, antiseptic wipes, medical tape, pain relievers, and any personal medications. Pre-made kits are available everywhere.

Tier 2: Expanded Kit ($50-100 additional)

These items prepare you for more situations and make breakdowns more comfortable.

• Jumper cables ($15-25): Even with a portable starter, cables are a backup. Get at least 12-foot, 8-gauge cables. Cheap thin cables don't carry enough current for larger vehicles.
• Basic tool set ($15-25): A multi-tool or small kit with pliers, screwdrivers (flat and Phillips), an adjustable wrench, zip ties, and duct tape. You'd be surprised how often a zip tie or wrench saves the day.
• Tow strap ($15-20): A rated tow strap (not a rope) for pulling a stuck vehicle out. Useful in snow, mud, or if you slide off a road.
• Blanket ($10-20): A wool or emergency Mylar blanket. If you break down in cold weather, your car loses heat fast once the engine is off. An emergency blanket could be lifesaving if you're stranded in winter.
• Water and snacks: At least a liter of water and some non-perishable snacks (granola bars, nuts). If you're waiting an hour or more for a tow, you'll be glad you have them. Replace water seasonally — it can freeze in winter or grow bacteria in summer heat.
• Phone charger: A car-compatible USB charger and cable. Your phone is your lifeline for calling help, navigation, and communication.
• Rain poncho ($3-5): Changing a tire in the rain is miserable. A $3 poncho makes it tolerable.
• Gloves: A pair of work gloves for handling dirty tires, jumper cables, or hot engine components.

Tier 3: Seasonal and Regional Additions

Winter Kit (Cold Climate)

• Ice scraper and snow brush: Essential in any area that sees frost or snow.
• Small bag of cat litter or sand: Pour under your tires for traction if you're stuck on ice.
• Extra warm layers: A hat, gloves, and an extra jacket in the trunk. If your car dies in 10°F weather, you need to stay warm until help arrives.
• Hand warmers ($5 for a box): Chemical heat packs that last 8+ hours. Inexpensive insurance against extreme cold.
• Small folding shovel ($15-20): For digging out of snow around your tires.

Summer Kit (Hot Climate)

• Extra water: Double your normal amount. Dehydration happens fast in a hot, broken-down car.
• Sunshade: Keeps the interior cooler if you're waiting for a tow in direct sun.
• Coolant: A small bottle of 50/50 premixed coolant in case of an overheating emergency.

Rural/Remote Driving

• Full-size spare: If your car only has a compact spare, consider carrying a full-size spare for remote trips where the nearest tire shop could be 100+ miles away.
• Extra fuel container: A small DOT-approved gas can (empty — fill it only when needed). Running out of gas on a remote highway is more common than people admit.
• Paper map: Cell service can be nonexistent in rural areas. A paper map of the region is a backup when GPS fails.

Where to Store Everything

Organization matters. Throw everything loose in the trunk and you'll never find the flashlight when it's dark. Use a small duffel bag, a plastic bin, or a trunk organizer. Keep the jump starter and flashlight easily accessible — not buried under luggage.

If you drive an SUV or hatchback without a separate trunk, consider a cargo organizer that straps in place so items don't roll around.

Maintain Your Kit

A kit you packed three years ago may not be ready when you need it:

• Every 3-6 months: Charge the portable jump starter, check flashlight batteries, replace expired water and snacks
• Every fall: Add winter items, check that blankets and warm layers are in the kit
• Every spring: Remove winter items, add extra water for summer
• After using any item: Replace it immediately