How to Prepare Your Car for Winter: Complete Winterization Guide

Cold weather can reduce your battery's capacity by up to 50%. A battery that barely started your car in fall may leave you stranded in winter.

• Use a multimeter to check voltage (should read 12.4V or higher when off, 13.7-14.7V when running)
• Inspect terminals for corrosion and clean with a baking soda solution if needed
• Check that cable connections are tight and secure
• If your battery is over 4 years old, consider proactive replacement

For detailed battery diagnostics, see our battery troubleshooting guide.

Proper tire pressure and adequate tread depth are critical for winter traction and safety.

• Check pressure when tires are cold (add 1-2 PSI above summer settings for winter)
• Measure tread depth with a penny test (if you can see Lincoln's head, tires are too worn)
• Inspect sidewalls for cracks, bulges, or damage
• Consider winter tires if you live in an area with heavy snow or ice
• Do not forget to check your spare tire pressure

Antifreeze protects your engine from freezing and cracking in cold weather, but only if the concentration is correct.

• Use an antifreeze tester to check protection level (should protect to at least -34°F)
• Look for discoloration or particles in the coolant
• Check coolant level in the overflow reservoir
• If weak, drain some and add concentrate to strengthen the mix

Standard washer fluid can freeze in cold temperatures, leaving you unable to clear road salt and grime from your windshield.

• Drain any remaining summer washer fluid
• Fill with winter-rated fluid (rated to -20°F or colder)
• Run the washers to flush old fluid from the lines
• Keep an extra jug in your trunk for topping off

Worn wipers cannot clear ice, snow, and salt spray effectively, severely reducing visibility.

• Check for cracks, tears, or stiff rubber
• Test by spraying and observing for streaking or skipping
• Consider winter-specific wiper blades with rubber covers that prevent ice buildup
• Replace if blades are over 6 months old or showing wear

Your heater and defroster are safety equipment in winter, not just comfort features.

• Start the engine and let it warm up fully
• Test heater on all settings and check for consistent heat
• Verify front and rear defrosters work properly
• Check cabin air filter and replace if clogged (reduces airflow)
• No heat may indicate low coolant, stuck thermostat, or heater core issues

Heater not working? A bad thermostat is a common cause. See our thermostat replacement guide.

Shorter days and winter storms mean you will rely heavily on your lights. Make sure they all work.

• Test headlights (low and high beam), taillights, and brake lights
• Check turn signals and hazard flashers
• Verify fog lights and reverse lights work
• Clean headlight lenses if cloudy or yellowed
• Replace any burned-out bulbs immediately

If you get stuck or stranded in winter weather, the right supplies can keep you safe until help arrives.

• Ice scraper and snow brush
• Jumper cables or portable jump starter
• Flashlight with extra batteries
• Warm blanket or sleeping bag
• Non-perishable snacks and water
• First aid kit
• Traction aids (cat litter, sand, or traction mats)
• Phone charger (12V adapter or battery pack)
• Small shovel and reflective triangles