Seasonal Car Maintenance: What to Check Each Season

Check tire pressure before driving, while the tires are cold. A temperature change can shift the reading even when no air has escaped, and a low tire may look normal from the curb. Use the pressure on the driver's door-jamb label or in the owner's manual—not the maximum printed on the tire sidewall.

A short inspection when the weather changes can catch things a mileage-based maintenance schedule won't: a wiper that started streaking during a dry spell, uneven tire wear, or leaves blocking a drain. Keep following the service schedule in the owner's manual, too. Note the date, mileage, and anything that needs another look so you can tell a new problem from an old one.

The baseline checks for every season

Park on level ground where you can work safely, switch off the engine, and let hot components cool. Follow the owner's manual for fluid specifications, service intervals, jack points, and vehicle-specific procedures. Then walk around the car:

• Tires: Check cold pressure, including the spare if there is one. Look for cuts, bulges, embedded objects, and uneven wear. Measure tread depth with a gauge, and replace tires before they reach the legal or manufacturer-specified minimum for your location and vehicle.
• Lights: Test headlights, brake lights, turn signals, reverse lights, and hazard lights. A reflection in a window—or another person's help—can make rear lights easier to check.
• Glass and wipers: Clean the windshield inside and out. Replace blades that chatter, skip, tear, or leave persistent streaks. Refill the washer reservoir with fluid suited to the expected temperature.
• Fluid levels and leaks: Follow the manual's instructions for checking engine oil and other owner-serviceable fluids. Look beneath the parked car for fresh or recurring leaks, but remember that clear water from air-conditioning condensation can be normal.
• Warning signs: Note dashboard warnings, unusual sounds, changes in braking or steering, and new vibrations. Arrange an inspection rather than trying to diagnose a safety-critical problem from a checklist.

Never open a hot coolant system. If the reservoir calls for a cold-engine check, wait until the engine is cold and use the coolant specified in the manual; color alone is not a reliable guide to compatibility. Brake-fluid level can change as brake pads wear, so a low level or a change in braking calls for professional attention, not just a top-up.

Spring: inspect after cold and wet weather

Wash winter salt and grit from the body and undercarriage, especially the wheel wells and lower panels. Once the car is clean, check for damaged paint or emerging rust. Washing helps you spot trouble; it cannot undo corrosion that has already begun.

Inspect wiper blades after months of ice, grit, or frequent use. Remove leaves and debris from the base of the windshield and visible drainage channels without forcing tools into openings. Blocked drains can let water reach places it shouldn't. Check the cabin air filter as the manual directs, particularly if airflow has weakened or the windows fog unusually easily.

Review tire wear, too. If you used winter tires, time the changeover to local conditions rather than a fixed date. Before storing the removed set, label each tire's position, clean and dry it, and follow the tire maker's storage guidance. If wear differs markedly from one side to the other, have the tires, alignment, and suspension checked; rotation alone may not address the cause.

Summer: prepare for heat and longer drives

Heat can expose weaknesses in an aging battery, though a charging fault may feel much the same from the driver's seat. Check that the connections are secure and show no obvious damage. If starting has slowed or the battery is nearing its recommended replacement interval, ask for a battery and charging-system test. Leave damaged terminals and electrical work you are not equipped to handle to a professional.

With the engine cold, check the coolant reservoir as the manual directs and look for visible hose damage or leaks. If you see an overheating warning, a rising temperature indication, steam, or notice a coolant smell, stop somewhere safe and follow the vehicle's instructions. Driving on with an overheating engine can cause serious damage.

Before a long trip, check tire pressure with the tires cold and the car loaded as it will be driven. Use any load-specific guidance on the pressure label. Inspect every tire, including the spare if fitted; don't assume a roadside kit contains one. Make sure the supplied tire-changing equipment or repair kit is present, and know its limitations. Clean headlights and any camera or sensor surfaces the manual permits you to clean, since dirt can interfere with visibility or driver-assistance features.

Autumn: get ready for shorter days and falling temperatures

Recheck cold tire pressure as temperatures fall, even if it was correct in summer. Inspect tread early enough to replace worn tires before the wettest or snowiest weather arrives. Choose winter or all-weather tires according to local conditions, applicable rules, and guidance from the vehicle and tire makers. Better traction does not remove the need to slow down and leave more stopping room.

As daylight hours shorten, test every exterior light. Clean dirty or hazy lenses and replace failed bulbs where the manual allows it. Test the heater and windshield defroster before you need them urgently. If the glass won't clear properly, have the ventilation system inspected rather than relying on wiping away condensation.

Switch to washer fluid rated for the expected freezing temperatures before the first freeze. If plenty of warm-weather fluid remains in the reservoir, follow the product and vehicle instructions; a small addition of winter fluid may not protect the whole mixture.

Winter: keep visibility and access reliable

Before driving, clear snow and ice from the windows, mirrors, lights, license plates, and roof. Snow sliding off the roof can block your view or affect other road users. Gently free frozen wiper blades before turning them on; running the motor against ice can damage the blades or mechanism. Use a scraper or another vehicle-safe method on glass, not hot water on a frozen windshield.

Keep fuel or battery charge well above the point where a delay would leave little reserve, particularly when travel conditions are uncertain. Carry essentials suited to the weather, such as warm clothing, a flashlight, a way to charge your phone, and any equipment required locally. To keep supplies easy to find at home as well, the guide to building and maintaining a household emergency kit covers how to organize and check them.

Keep seasonal checks separate from scheduled service

A seasonal inspection doesn't replace oil changes, brake service, timing-belt replacement where applicable, or other work due by time or mileage. Check the maintenance schedule and service reminders, and keep records and receipts together. If a tire repeatedly loses pressure, a warning light returns, or fluid levels keep falling, book a diagnosis instead of marking the issue resolved after another refill.

Finish each check with three columns: what you inspected, what needs attention, and when you'll deal with it. “Left rear tire loses pressure between checks—schedule inspection” gives the next visit a useful starting point. “Check tires” doesn't.