Winter throws everything at your car: cold starts, dark commutes, wet roads, and the occasional ice rink of a car park. A handful of easy checks in October or November can save you from a breakdown, an MOT failure, or a hairy moment on a frosty morning. Here is a no-nonsense checklist for UK drivers.
Give Your Battery a Health Check
Flat batteries are the number one cause of winter breakdowns in the UK. Cold temperatures sap a battery's ability to deliver the big burst of current the engine needs to start, and a battery that scraped through summer will often give up completely on a freezing January morning.
If your battery is more than 3 to 4 years old, get it tested before the cold weather hits. Most garages and motor factor shops will do a free or cheap battery test. A healthy battery should show 12.6 V at rest and stay above 10 V during cranking. If it falls short, replace it now rather than later. A new battery runs £60 to £150 fitted at most garages, which is a lot cheaper than a breakdown call-out.
Check Your Tyres Before the Temperature Drops
Tyre grip matters even more in winter. Cold, wet roads dramatically increase stopping distances, and a tyre sitting at 2 mm of tread might technically be legal but could behave dangerously once conditions deteriorate. If any of your tyres are below 3 mm, seriously consider replacing them before winter arrives.
Keep an eye on tyre pressures throughout the colder months too. Cold air is denser, and tyre pressure falls by about 1 PSI for every 10-degree drop in temperature. Under-inflated tyres handle poorly on wet and icy surfaces. You will find the recommended pressures in your vehicle handbook or on a sticker inside the driver's door frame.
Winter tyres (designed for temperatures below 7 degrees) are growing in popularity in the UK, though they are not legally required. They offer noticeably better grip in cold, damp conditions. That said, most UK drivers who stick to gritted main roads will manage fine with good-quality all-season or summer tyres in decent condition.
Get free quotes from qualified mechanics near you — no obligation, response within 48h.
Get my free quote →Coolant and Antifreeze
Engine coolant does double duty: it stops the water in your cooling system from freezing in winter and from boiling in summer. Most modern cars run a pre-mixed coolant that should be refreshed every 2 to 5 years, depending on what the manufacturer recommends.
The critical winter check is the antifreeze concentration. For UK conditions, the mixture should protect down to at least minus 25 degrees (many manufacturers recommend minus 35 degrees or lower for particularly cold regions). A coolant tester costs just a few pounds and checks the protection level in seconds. If it is not up to scratch, the system needs draining and refilling, which is a job best left to a garage.
Whatever you do, do not just top up with plain water when the coolant is low. Diluting the antifreeze lowers the freeze protection and defeats the purpose.
Lights, Screenwash, and Wiper Blades
Shorter days and poor visibility make working lights more important in winter, and a blown bulb is also an MOT failure. Walk around the car on a dark evening and test every light: dipped and full-beam headlights, brake lights, indicators, fog lights, and reversing lights. Replace any dead bulbs before the worst of winter hits.
Screenwash is one of the easiest things to overlook but one of the most important. Plain water in the washer bottle will freeze solid overnight in sub-zero temperatures, leaving you with no way to clear a dirty windscreen on a frosty motorway morning. Use a concentrated screenwash that protects down to at least minus 15 degrees in winter.
Take a close look at your wiper blades for splitting, hardening, or streaking. Winter-specific wiper blades that resist ice build-up are available, though standard blades in good nick will do the job for most UK winters. One important habit: never run your wipers on a frozen windscreen. It tears the rubber and can overload the motor.