Is your car winter-ready? A practical guide.

Last updated: 15 October 2026

Car problems caused by the cold of the winter months are more common that many drivers realise. Whilst motorists are busy dealing with exterior issues like frozen windscreens, internally their vehicles are quietly taking on some of the harshest conditions they’ll face all year.

Cold temperatures, poor road conditions and shorter journeys place extra strain on key components, making winter one of the most demanding times of year for vehicles.

This practical guide explains how winter affects your car, the warning signs to look out for, and the simple steps you can take to reduce the risk of unexpected winter breakdowns during the colder months.

It is important to keep up to date with your servicing and MOT schedule to ensure your vehicle is safe and roadworthy. You can also refer back to your vehicle owner’s guide for more information on looking after your vehicle during cold weather.

Key facts at a glance:  

Why are vehicles more likely to break down in winter?

Winter car problems are often caused by cold temperatures reducing efficiency, increasing wear and exposing existing weaknesses in key components.

As temperatures drop and driving conditions worsen, several key components in your vehicle are forced to work harder. This increase in strain makes winter the most common time of year for unexpected breakdowns, with failures themselves happening suddenly – often catching drivers completely off guard.

Here’s why vehicles can struggle in winter:

Even with good maintenance, winter breakdowns can still happen, and often without warning. To help budget for expensive and unexpected repairs, some motorists consider an extended warranty.

What are the most common winter issues?

Batteries:

It’s a cold, dark winter morning and you’re getting ready for the commute. You settle into the car, turn the key or press the start button, but you’re met with silence. You try again and hear a weak click, and your dashboard lights flicker tentatively. Eventually the engine stirs, but it’s clear the battery is struggling.

If any of this seems familiar, it’s likely you’ve experienced some winter-related battery issues.

Why do batteries suffer in winter?
 

Cold weather has a significant impact on battery performance. Cold temperatures slow the chemical reactions inside a 12-volt battery, while increased use of lights, heaters, wipers and demisters places more demand on it. The effect varies according to temperature, battery type, age, condition and vehicle use.

At the same time, the engine needs more power to start in cold conditions, placing extra demand on an already weakened system. It’s no surprise, then, that battery issues are one of the most common problems motorists can face during the winter months.

Alternators are also under increased strain in winter, as they work harder to recharge batteries while powering heaters, lights and demisters.

What does cold weather mean for EV charging?

Cold weather can reduce an EV’s efficiency because lithium-ion chemistry is less effective at low temperatures and energy is also needed to warm the cabin and, in some vehicles, the traction battery. A cold battery may accept energy more slowly at a rapid charger.

Regenerative braking may also be temporarily restricted when the traction battery is cold or already at a high state of charge. The vehicle will normally show this on the driver display, so leave additional stopping space and use the brakes normally.

What is the difference between auxiliary batteries and drive batteries?

An auxiliary battery is found in all cars. It is usually a small 12-volt battery, used to power the car’s electrical systems such as the lights, infotainment, central locking and onboard computers. In hybrid and electric vehicles, it also helps the car switch on and operate safely.

A drive battery is found in electric, hybrid and plug-in hybrid vehicles, and is sometimes called the traction or high-voltage battery. It is much larger than the auxiliary battery, and is responsible for powering the electric motor that moves the car.

Basically, the auxiliary battery runs the car’s systems, while the drive battery is what actually makes the (EV, HEV or PHEV) car drive.

What to look out for:

Cold weather can affect your battery in ways that aren’t always obvious at first. If your car is slow to start, your headlights appear dimmer than usual, or you hear a clicking sound when starting the vehicle, the battery may be struggling in lower temperatures.

If your battery is over three years old, it may be more susceptible to the effects of cold weather. It’s a good idea to contact your local garage to carry out a quick battery health check before the temperatures drop.

You can find more information on replacing your car battery in this article.

What you can do:

If you don’t drive very far day to day, an occasional longer journey can help keep your car running at its best. Limiting heavy electrical use can also make a real difference to battery health during the winter months.

If your car is likely to be off the road for a while, a trickle charger is a great way to maintain battery condition. It supplies a low, steady current that keeps the battery topped up without the risk of overcharging.

Top tips for looking after your battery in winter:

A quick note on jumpstarting your car:

Jumpstarting can get you moving again, but relying on it regularly can cause long-term damage.

Each jumpstart forces the battery (and sometimes other electrical components) to work far harder than they were designed to.

Over time, this can lead to premature battery failure and shorten the overall lifespan of your battery.

Always follow the vehicle handbook before attempting a jump-start. Hybrids and EVs may have designated connection points, and motorists should never work on high-voltage components.

Tyres:

Tyre problems often only become apparent once you’re on the road. If your car feels slippery or less responsive, particularly in wet, cold or lightly snowy conditions, it could be a sign that your tyres need attention.

Vibrations or shaking through the steering wheel at certain speeds can also indicate tyre wear or imbalance. You might even notice increased road noise, humming or squealing during turns, which are all potential signs of worn tread, uneven wear or poor wheel alignment.

What to look out for:

Winter conditions can impact tyres in several ways, often reducing both performance and safety.

As temperatures drop, the rubber becomes harder and less flexible, reducing the ability to grip the road, especially on wet or icy surfaces. You may also notice a drop in tyre pressure, which can make the car feel less stable or responsive when cornering or braking.

If your car starts to feel unsettled on the road, struggles for traction, or you experience vibrations through the steering wheel, your tyres could be affected by the colder conditions.

Winter-related tyre warning signs:

What you can do:

Maintaining the quality and pressure of your tyres is essential for staying safe on winter roads. Simple checks, especially before long journeys or during sudden temperature drops, can make a significant difference to grip, handling and braking performance.

For added confidence, many drivers choose to invest in winter tyres, which are designed to perform better in cold, wet and icy conditions.

Tips for looking after your tyres in winter:

By keeping on top of tyre health and making small adjustments to your driving habits, you can greatly reduce the risk of winter-related handling issues.

Brakes:

It is crucial to ensure your brakes are in good, working condition – especially during winter, when the roads are often dark, wet and slippery.

What to look out for:

If your brakes begin to feel less responsive, make a squealing or grinding noise, or you notice vibrations through the brake pedal, these could be signs of rust, warping or sticking components.

In winter conditions, stopping distances often increase. This can place extra strain on the braking system, as reduced road grip in wet winter conditions forces you to brake harder.

Winter-related brake warning signs:

What you can do:

Regular checks and gentle driving habits can help maintain braking performance and reduce wear on key components.

Tips for looking after your brakes:

By staying alert to changes in pedal feel, noise and stopping distance, you can catch issues early and keep your braking system reliable throughout the winter months.

Suspension:

Potholes are especially relevant this winter. Department for Transport figures published on 14 October 2026 show that, in the year ending March 2026, 4% of local A roads, 6% of B and C roads and 16% of unclassified roads in England were categorised as red, meaning they should have been considered for maintenance.

After a significant pothole impact, check for tyre-pressure loss, cuts, bulges or visible wheel damage. New vibration, pulling, uneven tyre wear, clunking or a steering wheel that no longer sits straight could indicate damage that needs professional inspection.

Here’s the latest road-condition statistics, local road-maintenance ratings and pothole reporting service.

Also, salt, grit and moisture can corrode all aspects of the suspension system leading to leaks, clunking sounds or a sagging stance that makes the car difficult to handle.

What to look out for:

If you notice a rough, jarring ride over uneven surfaces, or excessive bouncing after hitting bumps in the road, these could indicate stiffened parts or worn shocks.

Clunking, knocking or squealing noises from underneath the vehicle – especially during turns or braking – can suggest loose or failing bushing mounts or joints.

Other signs include uneven tyre wear or the car pulling to one side. These could imply corrosion, leaks or misalignment within the suspension system.

Winter-related suspension warning signs:

What you can do:

A few simple maintenance steps can help reduce wear, maintain ride comfort and keep your vehicle handling safely.

Tips for looking after your suspension:

By paying attention to how your car feels on the road and responding to issues quickly, you can prevent winter wear from developing into more serious suspension problems.

Fluid & cooling systems:

Low temperatures cause most car fluids to thicken, reducing cooling system protection and overall engine efficiency.

A delayed circulation of fluids means that metal parts run with less lubrication at the start of the drive, increasing wear and placing additional strain on the engine during cold starts.

Power-steering and hydraulic fluids can become viscous and affect steering, and over-diluted coolant can freeze or slush in very cold temperatures.

What about EVs?

While EVs do not have to worry about fuel or engine oil, they still use coolant for the battery, inverter and sometimes cabin heat. It’s also used by the gearbox in gear reduction, which optimises performance and efficiency.

What to look for:

Drivers can experience heavy steering when starting their journey. Power-steering and hydraulic fluids can thicken in cold weather, resulting in a slow, strained start until the car has fully warmed up.

To add to this, the composition of diesel fuel alters in cold weather and can lead to difficulty starting the vehicle, the engine cutting after starting, or not starting at all.

Typical signs of cold weather fluid issues for EVs include a noticeably reduced range, slower DC charging, and limited regenerative braking.

For all vehicles, the most obvious driver-visible symptoms are the car seeming ‘sluggish’ when cold, operating at reduced efficiency, and dashboard warning lights flashing.

If any of the above happen only in cold weather and improve once the vehicle is fully warmed up, it suggests the weather is affecting the fluids or cooling components.

Fluid & cooling system warning signs:

What you can do:

Preventative maintenance and good cold-weather habits can help keep everything running efficiently, whether you drive a petrol, diesel or electric vehicle.

Tips for looking after your fuel & cooling systems:

Good fluid health is one of the most effective ways to prevent winter-related performance issues. Staying ahead of scheduled maintenance can save you from sluggish starts, reduced efficiency and unexpected warning lights.

What is EV battery preconditioning?

Preconditioning involves warming your vehicle to its optimal temperature before you begin your journey. Your EV battery heats the high-voltage battery and once the battery has warmed, it will charge faster and deliver more power during cold weather.

According to this guide from recharged.com, preconditioning can provide:

Preconditioning can take anywhere from 15-45 minutes, so it is important to take this into account and plan ahead in cold weather. Instructions vary by vehicle, with more information outlined in the owner’s handbook.

Cold weather checklist:

Before setting off, clear snow and ice from every window and mirror, clean the lights and number plates and remove snow that could fall into another road user’s path.

The Highway Code says stopping distances are at least twice as long in wet weather and can be ten times greater on ice and snow. Treated roads may still be slippery.

Headlights must be used when visibility is seriously reduced, generally when you cannot see for more than 100 metres. Fog lights must be switched off when visibility improves.

Source: Highway Code rules 226–236.

Fuel:

Make sure you have enough fuel to comfortably complete your journey. Winter traffic and road conditions can cause delays, meaning you may be on the road longer than expected and use more fuel as a result.

Oil:

Check your vehicle’s oil level using the dipstick and ensure it sits between the minimum and maximum markers. If needed, top up using the correct oil for your vehicle, as cold temperatures can make oil thicker and less effective.

Rubber (tyres & wipers):

Tyres:

Your tyres play a crucial role in keeping you safe during winter. Check both tread depth and tyre pressure regularly.

The legal minimum tread depth for cars, light vans and light trailers is 1.6mm across the central three-quarters of the tyre and around its full circumference. TyreSafe says tyre and safety experts commonly advise replacing tyres at 3mm rather than waiting until they reach the legal limit.

Check pressures when the tyres are cold and inspect for cuts, cracking, bulges, embedded objects and uneven wear. The 20p test is useful for a quick check, but a tread-depth gauge provides a more accurate measurement.

Source: TyreSafe tread-depth guidance.

Inspect your tyres for any signs of damage, such as bulges, cuts or cracks.

Driving on damaged tyres can be extremely dangerous and they must be replaced as soon as possible.

Wipers:

Good visibility is just as important. Check your wiper blades for signs of wear by running a finger along the rubber edge and look for cracks or splits. Wiper blades should typically be replaced every 12 months, or sooner if they’re not clearing the screen effectively.

Coolant:

Ensure your coolant level sits between the minimum and maximum markings and top up if required. Correct coolant levels help protect your engine from freezing temperatures and overheating.

Electrics:

With shorter days and poorer weather, clear and fully working lights are essential. Salt, dirt and snow can quickly build up on lights during winter, so they need to be cleaned regularly to maintain visibility.

To check all lights are working correctly, ask someone to help or use reflections from nearby surfaces. With the engine running, test headlights, full beam, indicators, brake lights and hazard lights. Any faulty bulbs should be replaced promptly.

Screen wash:

Winter roads can quickly cover your windscreen in dirt, grime and road salt so make sure you have enough screen wash for your journey.

During colder months, use a high-quality additive or pre-mixed screen wash. This helps prevent freezing and ensures effective cleaning in temperatures as low as -15°C.

What to keep in your car during winter

The Highway Code recommends carrying an emergency kit when travelling in icy or snowy conditions. Depending on your journey and the forecast, useful items include:

• An ice scraper and de-icer
• A torch and spare batteries
• Warm clothing, waterproof footwear and a blanket
• A first aid kit
• A phone charging cable or power bank
• Jump leads, provided you know how to use them safely with your vehicle
• A shovel when snow is forecast
• Water, a warm drink and emergency food for longer journeys

Source: The Highway Code, Rule 228.

Conclusion:

Winter can be tough on your car, with cold temperatures, poor road conditions and short journeys placing extra strain on key components.

While regular checks and simple maintenance can help reduce the risk of problems, some winter failures are difficult to predict, even in well-maintained vehicles.

While wear-and-tear items, often referred to as consumables, aren’t included, a tailored Warrantywise plan can help you budget for unexpected mechanical or electrical failures. Alongside good vehicle care, this offers added reassurance when driving in challenging winter conditions.