The Best Roadside Emergency Kits for Road Trips, and What to Add
A roadside kit only has to solve four failures: a dead battery, a flat tire, being invisible on the shoulder at night, and waiting a long time for help. A pre-made kit typically covers visibility and first aid, and skips the two that strand you. So buy a kit for the base, then add a lithium jump starter, a real tire plug kit with an inflator, and water. That combination handles the overwhelming majority of roadside stops.
The rest of this guide is how to judge a pre-made kit, what to add for your climate and vehicle, and how to keep the kit working instead of quietly dying in your trunk.
Build the rest of what goes in the car with our free packing list generator, which sorts your trip into what rides up front and what lives in the trunk.
Updated September 2026. Vehicle safety equipment requirements vary by state and by country, and rental and RV rules differ again. Check your state's own requirements and your vehicle owner's manual before you rely on any list.
The Four Failures a Kit Has to Solve
Almost every roadside stop falls into one of four buckets. Judge any kit, pre-made or built, on how many of them it actually handles.
| Failure | How common | What solves it | Does a typical pre-made kit include it? |
|---|---|---|---|
| Dead or weak battery | The most common single cause of a roadside call | Portable lithium jump starter, or jumper cables plus a willing stranger | Cables sometimes, jump starter almost never |
| Flat or slow leaking tire | Very common, especially on long highway legs | Plug kit plus a 12V inflator, or a full size spare and a working jack | Rarely, and the included inflators are often weak |
| Not being seen on the shoulder | Turns a nuisance into a serious risk | Reflective triangles or LED flares, a high visibility vest, a real flashlight | Triangles and a vest usually, flashlight often a poor one |
| A long wait for help | Hours, not minutes, in rural areas | Water, blankets, food, a power bank, a paper map | Almost never |
That last row is the one that separates a kit that looks reassuring from a kit that helps. A tow on an interstate near a city might be under an hour. In a rural county at night in bad weather, planning for several hours is realistic.
Best Roadside Emergency Kits for Road Trips: Buy or Build
Both approaches work. The right choice depends on how much you want to think about it.
| Approach | Strengths | Weaknesses | Best for |
|---|---|---|---|
| Pre-made kit, as sold | Fast, tidy, comes in a case that stays organized, covers first aid and visibility | Thin gloves, weak flashlight, short cables, no jump starter, no water | Second cars, teen drivers, city driving |
| Pre-made kit plus additions | Best balance of effort and coverage, keeps the case | You still have to buy three or four extra items | Most road trippers, this is the recommendation |
| Fully built kit | Every item is one you chose and trust | Takes an afternoon, and loose items scatter in the trunk | Frequent long distance drivers, rural or winter driving |
| Rental car trip | You bring the light items, the rental company covers the rest | You cannot control the spare or the jack | Fly and drive trips |
How to judge a pre-made kit on the product page. Look for four specifics rather than a piece count. A high piece count is usually 60 adhesive bandages padding the number.
- Jumper cable gauge and length. Lower gauge is thicker. Look for 6 gauge or thicker, and at least 12 feet, because you cannot always park nose to nose.
- Whether the flashlight takes batteries or charges. A battery flashlight with dead batteries is a paperweight, and included batteries are usually the first thing to die.
- Glove type. Thin latex gloves are for first aid. You also want one pair of heavy work gloves for anything involving a wheel or a hot engine.
- Case size versus your trunk. A kit you have to unload to reach the spare will get left at home.
If a kit has all four, it is a good base. Then add what follows.
The Four Things Almost No Kit Includes
These are the additions that turn a base kit into something that gets you moving again.
A lithium jump starter. This is the single highest value item in the entire trunk. It jumps a car without a second vehicle, which matters most at 6 a.m. in an empty lot. Look for peak amps rated well above your engine size, a USB output so it doubles as a power bank, and a built in light. Charge it before every trip and top it up every few months, because they self discharge in storage.
A tire plug kit and a 12V inflator. Most flats are slow punctures from a screw or nail, not blowouts, and a plug kit fixes those at the roadside in about fifteen minutes. Buy the plug kit and the inflator together, because a plug without air just means a repaired flat tire. Practice once in the driveway on an old tire if you can, since the reamer takes more force than people expect.
Water and food that survives a trunk. Sealed water for everyone in the car, plus something calorie dense that does not melt or go stale, like nut bars or trail mix. Rotate at the start of each season.
A power bank and a long cable. Your phone is your tow truck, your map and your flashlight. A dead phone on a shoulder is the actual emergency. Keep a power bank charged separately from the jump starter, or buy a jump starter that doubles as one.
The Full Roadside Kit Checklist
Here is the complete list, sorted by what job it does.
Get moving again
- Portable lithium jump starter, charged
- Heavy gauge jumper cables as a backup
- Tire plug kit with reamer, plugs and cement
- 12V tire inflator with a pressure gauge
- Working spare, jack and lug wrench (check that the wrench actually fits your lugs)
- Wheel wedge or chock
- Tow strap rated above your vehicle weight
- Funnel and a sealed quart of your engine oil
- Coolant or plain water for the radiator
- Fuses matching your vehicle's fuse box
Be seen and be safe
- Reflective warning triangles, or LED flares that do not roll away
- High visibility vest for each adult
- Headlamp, so your hands stay free, plus a handheld flashlight
- Heavy work gloves
- Fire extinguisher rated for vehicles
- Seat belt cutter and window breaker, stored within reach of the driver's seat, not in the trunk
Wait it out
- Sealed water and non perishable food
- Wool or emergency blankets, one per person
- Rain ponchos
- Phone power bank and cables
- Paper map of the region
- Cash in small bills for tows or gas that cannot take a card
- A printed card with insurance, roadside assistance and emergency contact numbers
Fix and patch
- Duct tape and self fusing silicone tape for hoses
- Zip ties in two sizes
- Multi tool and a small socket set
- Shop rags and hand wipes
- A tarp or old blanket to lie on
Documents and admin
- Registration and proof of insurance in the glovebox
- Roadside assistance membership card
- Owner's manual, which tells you the jack points that are actually safe
Your medical supplies belong in a separate, accessible bag rather than buried in the trunk kit. Our travel first aid kit guide covers what to include and what to skip.
Worked Example: Building a Kit for a Family of Four, 1,400 Miles
Two adults, two kids, a mid size SUV, five days, late October, driving through mountains where overnight temperatures drop below freezing.
Step 1, the base. One mid size pre-made kit with triangles, a vest, basic first aid, cables and a case. That covers visibility and minor first aid.
Step 2, the additions. Lithium jump starter, tire plug kit, 12V inflator, headlamp, heavy work gloves. Five items, and they solve the two failures the pre-made kit ignored.
Step 3, the wait it out layer, scaled to four people. Four wool blankets. One gallon of sealed water plus four individual bottles. Eight nut bars. Two ponchos for the adults, since the kids stay in the car. One power bank with two cables.
Step 4, the season and route. October in the mountains means an ice scraper, a folding shovel, a bag of cat litter for traction, and a set of chains if the pass requires them. Check the state department of transportation page for the passes on your route, because chain requirements are posted per road and change with the weather.
Step 5, the pre-trip checks, done the week before. Tire pressure on all five tires including the spare, which is almost always the one that is flat. Wiper blades and washer fluid. Oil level. Jump starter charged to full. Confirm the lug wrench fits and the jack is present, because rental and used vehicles frequently are missing one.
Step 6, the layout. Jump starter, flashlight, phone cables and the seat belt cutter live in the cabin, reachable from the driver's seat. Everything else goes in a single hard case at the very back of the trunk, on top of the luggage, not under it. If you have to unpack the whole car to reach the kit in the rain, you will not reach it.
The result: one case, one cabin pouch, and a fifteen minute pre-trip check. Total time to assemble, about ninety minutes including a store run.
For how the kit fits alongside everything else in the car, our road trip packing list covers the front seat versus trunk split, and how to plan a road trip covers the daily driving hours that decide how remote you will be when something happens.
Seasonal and Regional Additions
The base kit is the same everywhere. These are the swaps.
| Condition | Add | Why |
|---|---|---|
| Winter and mountain passes | Wool blankets, ice scraper, folding shovel, cat litter or sand, chains, extra hats and gloves | Staying warm is the actual survival problem, and traction gets you moving |
| Desert and long rural legs | Extra water well beyond what seems reasonable, sun shade, wide brim hat, coolant | Heat and distance between services, not cold, are the risk |
| Heavy rain and flood country | Ponchos, waterproof boots, a bright flashlight, extra wiper blades | Visibility drops and shoulders turn to mud |
| Wildlife country at dusk | Brighter flashlight, reflective vests worn, not just carried | You will be standing on a shoulder in low light |
| Towing or an RV | Heavier tow strap, wheel chocks, a wrench sized for your rig's lugs, spare fuses | Your vehicle weighs far more and standard gear is undersized. See our RV trip checklist |
| Electric vehicle | A portable Level 1 charging cable, a tire plug kit, an adapter set | Most EVs have no spare tire at all, so a plug kit is not optional |
That last row deserves a note. Many electric vehicles ship without a spare tire and without a jack, and their tires are often low profile. A plug kit and inflator move from nice to have to essential, and a jump starter is still useful because EVs also have a 12V accessory battery that can die.
Keeping the Kit Alive
A roadside kit is not a purchase, it is a small maintenance habit. Everything in it degrades quietly.
Every trip, before you leave
- Charge the jump starter and the power bank to full
- Check tire pressure on all tires including the spare
- Confirm the flashlight and headlamp work
Twice a year, at the season change
- Replace water and food
- Test the inflator by running it for thirty seconds
- Check first aid supplies for expiration and replace what has expired
- Swap the seasonal layer, so winter gear goes in and comes out
- Check the fire extinguisher gauge
Once a year
- Replace flashlight batteries even if they still work
- Inspect jumper cable clamps for corrosion
- Confirm your roadside assistance membership is still active and the number in the kit is current
The most common failure is a jump starter that sat in a hot trunk for two years and holds no charge. It is a five minute check and it is the difference between a kit and a decoration.
What Not to Bother With
Enormous first aid kits. A hundred bandages will not help you on a shoulder. A compact kit plus a real trauma dressing and a tourniquet is more useful than volume.
Bargain jumper cables. Thin, short cables often will not start a cold engine. If cables are your only battery plan, buy heavy ones.
Road flares that burn. LED flares are safer, reusable, and legal everywhere. Burning flares near a fuel leak is a bad combination.
Gas cans stored full. Storing fuel in the passenger area or trunk is a real fire risk, and many rental agreements and tunnels prohibit it. Carry an empty can only if you drive very remote routes.
Anything you have never used. A tool you have not touched will not get used correctly at night in the rain. Practice with the plug kit and the jack once at home.
Frequently Asked Questions
What should be in a car emergency kit for a road trip?
At minimum: a charged lithium jump starter, a tire plug kit with a 12V inflator, reflective triangles, a high visibility vest, a headlamp, heavy work gloves, water, blankets, a phone power bank, and a compact first aid kit. Those items cover the four things that actually happen: dead battery, flat tire, being invisible on the shoulder, and waiting a long time for help.
Are pre-made roadside emergency kits worth buying?
Yes, as a starting point. They give you visibility gear, basic first aid and an organized case for far less effort than sourcing it all yourself. They almost never include a jump starter, a tire plug kit, an inflator, or water, which are the items that get you moving again. Buy the kit for the base and add those four.
Do I need a jump starter if I have jumper cables?
A jump starter is better, because cables need a second vehicle and a driver willing to stop. In a rural area or an empty parking lot at night, that willing stranger may not appear for a long time. Carry both if you have room: the jump starter for independence, cables as a backup if the starter is flat.
How often should I check my roadside emergency kit?
Charge the jump starter and power bank before every trip and confirm the lights work. Twice a year, replace the water and food, test the inflator, check first aid expiration dates, and swap the seasonal gear. Once a year, replace flashlight batteries and inspect the cable clamps for corrosion.
What extra gear do I need for a winter road trip?
Warmth and traction. Wool blankets for every person, extra hats and gloves, an ice scraper, a folding shovel, and cat litter or sand for grip under a spinning wheel. Chains if your route crosses a pass that requires them, which is posted per road by the state department of transportation and changes with conditions. Keep the fuel tank above half so you can run the engine for heat while you wait.
Where should I store the emergency kit in the car?
Split it. The jump starter, a flashlight, phone cables and a seat belt cutter with window breaker belong in the cabin, reachable from the driver's seat. Everything else goes in one hard case placed on top of the luggage at the back of the trunk, never underneath it, so you are not unloading suitcases in the rain to reach a tire plug.
Does an electric vehicle need a different emergency kit?
Mostly the same kit, with two changes. A tire plug kit and inflator become essential because most electric vehicles have no spare tire and no jack. And you still want a jump starter, since the separate 12V accessory battery that powers the electronics and door releases can go flat even with a healthy main pack. Add your portable Level 1 charging cable.
Should I carry a fire extinguisher in my car?
Yes, a compact extinguisher rated for vehicle use, mounted where you can reach it quickly rather than loose in the trunk. It will not fight a fully involved engine fire, and you should never open a hood that is already burning, but it handles small electrical and cabin fires and buys you time to get everyone out.
Before You Pull Out of the Driveway
Charge the jump starter. Check the pressure in five tires, not four. Confirm the lug wrench fits. Move the cabin items within arm's reach of the driver. Then plan the driving days with our guide to the best road trip planner apps and websites, and build the rest of the car load with the packing list generator.
