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Spare tire - This is a no-brainer, but some people take them out of their vehicles. Don't be one of those people.

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Tire jack and iron - You should also have the kit to actually change the tire.

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Tire inflater and sealer - This can be useful to get you to the auto repair shop without having to change your tire.

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Tire pressure gauge - Checking your tires' pressure on a regular basis is important, so keep one in your car.

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Jumper cables - This is one you're probably familiar with, and for a very good reason. Keep them in the trunk.

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Emergency battery booster - Alternatively you can also keep one of these. It's essentially a power bank for your battery.

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Charger - It's always good to have a cable to charge your phone while you're on the road. Especially when our phones very often work as maps. 

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Umbrella - Weather is unpredictable, and often strikes at the most inconvenient moments. Keeping an umbrella in your car makes sure you're always prepared. 

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High-visibility reflective vests - These are compulsory in some countries, and for a good reason. 

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Reflective triangle - In many countries, it is a legal requirement to carry these in the car.

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Owner's manual - Some people don't keep these in their cars, however car manuals have valuable information about your vehicle.

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Tissues - Whether it's to blow your nose or to mop up a mess, it's good to keep a box of tissues around in your car. 

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Water bottles - These are extremely useful, not only to quench your thirst but to use them in your car if needed (e.g. radiator). 

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Flashlight - A very useful item to keep in your car, for obvious reasons.

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First Aid kit - Buy a basic First Aid kit and keep it in the trunk, for emergencies.

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Blanket - A nice warm blanket can be used in a variety of scenarios, including keeping you warm if you get stuck somewhere cold. 

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Fire -

Keep matches or a lighter in your car. Being able to start a fire can be life-saving at times.

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Change of clothes - This might come in handy, especially in the winter when you're more likely to get wet.

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Shopping bags - Just keep at least one in your car. You never know when you might need to buy some groceries on the go, and you can avoid single-use plastic!

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Spare cash - Keep some spare change in your car. You might need it for a parking meter, for instance.

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Pen and pencil - You can keep a pen instead, but a pencil won't dry out.

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Spare bulbs - These are a legal requirement in some countries. It's always good to keep them in your trunk, just in case.

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Paper towels - These are thicker and more absorbent than your regular tissues, and sometimes come in handy.

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Ice scraper - This is a must-have item to keep in your car during winter, for those frosty mornings.

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Microfiber towel - These are great for a number of cleaning tasks, or to cover up your seat if you get wet or muddy. 

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Cardboard or carpet - These are particularly useful during snowy conditions as you can place them under the tires for traction.

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Space blanket - This item could save your life in cold conditions. They're lightweight and small enough to keep in the trunk.

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Road maps - Yes, keep a paper map in you car. You never know when technology might fail you.

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Seat belt cutter -

Keep this item in your glove compartment, for emergencies.

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Window breaker - Most seat belt cutters also work as window breakers, so it’s a great emergency tool to keep in your car.

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Energy bars - Keep a few of these in your car, in case you get stuck somewhere without access to food.

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Multi-tool - This is a small item that you can use for a lot of different tasks. Keep one in your car.

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Auto repair info - Keep some car repair information in case you need a mechanic to check your vehicle at short notice.

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Weather radio - If you venture out into the wilderness in the winter, make sure to have one of these in your car.

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Duct tape - If you're keeping any kind of tape in your car, this is the one to buy.

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WD40 -

The classic spray might come in handy, so why not keep one in the trunk?

See also: The best-selling cars ever, by country

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