How to Prepare a Breakdown Kit for Your Car

You do not need a boot full of tools to be ready for a breakdown. In fact, the most useful items in a car breakdown kit are simple: a way to stay visible, a way to keep warm, a way to call for help and a few small things that solve the most common problems. The aim is not to turn you into a roadside mechanic but to keep you safe and comfortable while you wait for assistance. This guide explains what to pack, why each item matters, how to adjust the kit for the season and how to keep it ready for use.

Start with the principle: safety, communication, comfort, small fixes

Think about the kit in four layers.

1. Safety: stay visible, stay protected.
2. Communication: call for help, share your location.
3. Comfort: keep warm, hydrated and calm.
4. Small fixes: handle common minor problems if it is safe to do so.

If space is limited, prioritise in that order.

Layer 1: safety items

High-visibility jacket or vest. Keep one for every regular passenger, and store them in the cabin (for example in a door pocket or under a seat) rather than in the boot. If you break down on a fast road, you do not want to open the boot beside traffic to find them.

Torch. A head torch is ideal because it frees both hands. An LED torch with spare batteries, or a wind-up torch, also works. Check it regularly.

Warning triangle. Where used, it should be placed according to current guidance and only when it is safe to do so. Do not use it on motorways, and do not put yourself in danger to place it.

First aid kit. A basic kit with plasters, dressings, gloves and a foil blanket. Check expiry dates and replace used items.

Fire extinguisher. Optional for many drivers. If you carry one, choose a type suitable for vehicle use, learn how to use it and do not put yourself at risk. In most cases, your priority is to move away from a burning vehicle and call 999.

Reflective items for pets or children, if you regularly travel with them in poor visibility.

Layer 2: communication

• Phone charger and power bank. A flat phone can turn a minor problem into a serious one. Use a charger suitable for your phone and keep a short cable in the glovebox.
• Printed card with key numbers: your breakdown provider’s number, policy or membership number, your insurer’s helpline and a trusted contact. Phones can fail, so paper is a useful backup.
• Knowledge of your location. Practise sharing your location from your map app. On motorways, note the marker post numbers.
• Pen and notepad for taking reference numbers and notes.

Layer 3: comfort

Waiting for help can take time, particularly in cold or wet weather or in remote areas.

• Blanket or foil blankets for each passenger.
• Warm hat, gloves and spare socks in winter.
• Waterproof jacket or poncho.
• Bottled water and some non-perishable snacks such as cereal bars. Replace them from time to time so they do not go stale.
• Wet wipes or hand cleaner for dirty tasks.
• Items for children: a small toy or book, and nappies and wipes for infants if relevant.
• Medication that you or your passengers need regularly, if you will be travelling far.

Layer 4: small fixes

These items let you deal with the most common problems if it is safe and you feel confident. If you are on a motorway, a busy road or in doubt, do not attempt repairs and wait for the professionals.

Jump leads or a portable jump starter. A flat battery is among the most common reasons for breakdown calls. A portable starter does not need another car and can be simpler to use. Check the instructions for your vehicle, especially if it is a hybrid or electric model with a separate 12-volt battery. Our guide to jump-starting a car covers the process.

Tyre repair kit or a compressor/inflator. Many modern cars have no spare wheel and instead supply a repair kit or inflator. Check what yours has and read the instructions before you need them. A 12-volt inflator that plugs into the socket can help with slow punctures, though it is not a fix for serious damage.

Spare wheel, jack and wheel brace if your car has them. Check that the spare is inflated and that you can find the locking wheel nut key.

Tyre tread depth gauge and pressure gauge. Useful for regular checks.

Basic tools: a multi-tool, screwdrivers, pliers, adjustable spanner, tape and cable ties. These are for light, low-risk fixes such as tightening a loose clip. Do not do anything that makes the car unsafe.

Spare fuses and bulbs, if your vehicle supports user replacement and you know how to do it.

Engine oil and coolant, a small top-up bottle of each, matched to the vehicle. Check the manual for the correct type. Never open a hot cooling system.

Gloves and a small tarp or mat to kneel on.

Tow strap: only if you know how to use it safely. In many cases it is better to wait for a proper recovery vehicle, and towing a modern car incorrectly can cause damage. Never tow on a motorway.

Season-specific extras

Winter

• Ice scraper and de-icer.
• Small shovel or foldable spade.
• Warm clothing, hats and gloves.
• A flask for hot drinks.
• Sturdy boots or waterproof shoes.
• Sacking, old carpet or traction mats for slippery ground.
• A full tank of fuel or a charged battery before long trips in cold weather.

Summer

• Extra water, especially for long traffic delays.
• Sun hat, sun cream and sunglasses.
• Sunshade for the windscreen.
• A battery-powered fan or cooling items for children and pets.

Autumn and spring

• Waterproofs for sudden showers.
• A microfibre cloth to clear misted windows.
• Spare wiper blades or a screenwash top-up.

Documents and information to keep handy

• Vehicle registration details, make, model and colour.
• Driving licence and insurance details.
• Breakdown cover membership or policy information.
• MOT and service history notes, and the owner’s manual.
• Emergency contacts, medical information for family members if appropriate.
• The locking wheel nut key location.

Keep personal data to a minimum in a place that could be seen by others. Do not leave sensitive documents in an unattended car.

Where to store everything

Organise by when you will need it.

• Cabin (quick access): high-visibility jackets, torch, power bank, phone charger, printed contact card.
• Boot (tools and heavier items): jump starter, inflator, tools, blanket, water, first aid kit.
• Pocket or door storage: gloves, wipes, small items.

Use a sturdy bag or box with a lid so items do not roll around. Secure heavy items so they cannot become projectiles in a sudden stop.

Keep the kit ready: a simple check schedule

A kit is only helpful if it works when needed.

When	What to check
Every month	Torch works, phone charger works, tyre pressures
Every three months	Water and snacks, first aid kit contents
Before winter and summer	Season-specific items, battery condition
Every year	Expiry dates, jump starter charge, documents

Put a reminder in your calendar and tie it to something you already do, such as a service or MOT.

A budget-friendly way to start

If you are building a kit from scratch, begin with the essentials: high-visibility jacket, torch, phone charger or power bank, blanket, water, and a contact card. Add a jump starter and tyre inflator next. Build up the rest over time. There is no need to spend a lot or buy everything at once.

Things not to put in the kit

• Items that are dangerous in a hot car, such as aerosols and spare fuel containers stored without proper approved containers. Check current rules and guidance.
• Valuables that attract theft.
• Anything that could harm you if it flew about the cabin in a crash.

How to Jump-Start a Car Battery Step by Step
What to Do When Your Car Breaks Down on a Motorway

FAQs

Is a breakdown kit a legal requirement in the UK?
There is no general legal requirement to carry a full breakdown kit in a car in the UK, but carrying certain items is sensible, and different rules apply abroad.

Do I need a spare wheel?
Not all cars have one. Check whether yours has a spare, a repair kit or run-flat tyres, and know how to use it.

What is the most important single item?
A charged phone, closely followed by a high-visibility jacket and a torch.

Can I rely on my breakdown cover instead of a kit?
Cover helps, but you may wait some time. A kit keeps you safe and comfortable while you do.

Conclusion

A good breakdown kit is small, simple and checked regularly. Focus on safety, communication, comfort and a few small fixes, adjust it for the season and keep the most urgent items within reach in the cabin. With a little preparation, a breakdown becomes less of an emergency and more of an inconvenience.