Every winter the pattern repeats: the first hard frost arrives, and the tow trucks get busy. Almost everything on their route sheets was preventable in October.
Battery first
Cold weather cuts a battery’s cranking power by a third or more, and a battery that started fine all summer can fail on the first −15 °C morning. Any workshop can load-test a battery in five minutes. If yours is past its fourth winter, test it — or simply budget for its replacement on your own schedule instead of the battery’s.
Coolant and rubber
Coolant does two jobs: it keeps the engine from overheating in July and from cracking in January. A refractometer check confirms your antifreeze concentration is good for the temperatures ahead. While you are under the hood, look at the wiper blades and washer fluid — visibility failures cause more winter accidents than traction failures.
Tires below four millimeters of tread are legal in most places and inadequate everywhere once snow falls. Check the date code too: rubber older than six years hardens and loses grip regardless of tread depth.
Small things that strand people
Door and trunk seals freeze shut when water sits in them — a silicone wipe takes two minutes. Fuel systems dislike quarter-full tanks in freezing weather; condensation is real. And if your region salts its roads, an underbody wash before the first snowfall is the cheapest rust prevention you will ever buy.
