Summary

28 items · 30–60 minutes per seasonal review

Why Seasonal Checks Matter More Than Most Drivers Realize

Your car doesn't experience the year the same way you do. While you're layering up in January or cranking the AC in July, your vehicle's battery, tires, fluids, and seals are each responding to temperature extremes, road conditions, and usage patterns that shift dramatically between seasons. Skipping a seasonal review doesn't just risk inconvenience — it can accelerate wear that turns a minor fix into a major repair bill.

The good news is that most seasonal checks are straightforward. You don't need a mechanic's toolkit or a lift. You need about 30 minutes, decent lighting, and a willingness to look closely at a handful of systems. For a broader foundation on keeping your car in shape year-round, see our First-Time Car Owner's Guide.

Use the checklist below every time the season changes — that's four reviews per year, ideally completed before the harshest conditions of each season arrive.

Required

Tire Pressure Gauge

Accurately checks tire inflation against the manufacturer's recommended PSI.

Required

Flashlight or Headlamp

Illuminates the engine bay, undercarriage, and tire sidewalls for close inspection.

Optional

Digital Multimeter or Battery Tester

Tests battery voltage to identify weakened batteries before they fail in cold or heat.

Required

Penny (for tread depth test)

Provides a quick, no-cost check of whether tire tread has worn to an unsafe level.

Required

Microfiber Cloth

Useful for wiping dipsticks cleanly before checking oil level and condition.

Required

Vehicle Owner's Manual

Provides manufacturer-specific fluid specifications, service intervals, and tire pressure recommendations.

The Seasonal Maintenance Checklist

Items are grouped by the season when they're most critical, though many overlap. Complete all items in the relevant season's group, and revisit the Every Season group each time.

Every Season (Repeat 4× per year)

Check tire pressure with a gauge and inflate to the vehicle manufacturer's recommended PSI, found on the door jamb sticker — not the tire sidewall. Must
Inspect tire tread depth using the penny test: insert a penny into a tread groove; if you can see the top of Lincoln's head, tread is worn and tires need replacing. Must
Check engine oil level and color on the dipstick — dark, gritty oil typically means a change is overdue. Must
Verify all exterior lights are functioning: headlights, brake lights, turn signals, and reverse lights. Must
Top off windshield washer fluid and confirm wipers clear the glass cleanly without streaking. Should
Review your fluid levels for coolant (antifreeze), brake fluid, and power steering fluid — refer to our fluid checks guide for what healthy levels look like. Should

Spring

Inspect the undercarriage and wheel wells for rust or damage caused by road salt used during winter months. Must
Switch from winter tires to all-season or summer tires once overnight temperatures consistently stay above 45°F. Must
Test the battery with a voltmeter or ask a shop to test it — cold weather strains batteries and spring is when weakened ones often fail. Must
Replace wiper blades if winter use has worn them; spring rain makes functional wipers critical for visibility. Should
Clean out winter floor debris and check that drainage holes under the doors aren't blocked, which can cause interior rust. Nice to have

Summer

Check coolant (antifreeze) concentration and level — heat-related overheating is one of the most common summer breakdowns. Must
Inspect belts and hoses for cracking or softness, as high engine temperatures accelerate rubber degradation. Must
Test the air conditioning system; if it blows warm air or makes unusual noises, have a technician inspect it before peak heat. Should
Recheck tire pressure monthly — for every 10°F increase in ambient temperature, tire pressure rises roughly 1 PSI, which can lead to overinflation. Should
Keep a bottle of water in the trunk and verify your roadside emergency kit is stocked, since summer travel and heat increases breakdown risk. Nice to have

Fall

Have the battery tested if it's more than three years old — cold start demands increase sharply in winter and weak batteries fail fast. Must
Check brake pad thickness; wet fall roads and upcoming winter stopping demands make this a critical inspection point. Must
Inspect the heating system and defroster function before cold weather arrives, replacing cabin air filters if they haven't been changed in 12–15 months. Should
Switch to winter tires if you live in an area with consistent snowfall or ice — do so before the first freeze. Should

Winter

Verify washer fluid is rated for freezing temperatures — standard summer fluid will freeze in the reservoir and damage the pump. Must
Keep the gas tank at least half full to prevent fuel line freeze and to ensure you have reserve fuel if stuck or delayed. Must
Stock your trunk with a basic winter kit: ice scraper, jumper cables or a jump starter, a blanket, and road flares or reflective triangles. Should
Check that 4WD or AWD systems engage and disengage correctly if your vehicle has them — test in a safe, empty area before relying on them in poor conditions. Should
Let the engine warm up briefly before driving in extreme cold, but avoid prolonged idling, which wastes fuel and can increase engine wear. Nice to have

Don't Rely on Visual Checks Alone for Brakes

Brake pads can appear adequate through the wheel spokes but still be dangerously thin in areas you can't see without removing the wheel. If you notice squealing, grinding, vibration when braking, or a longer stopping distance than usual, take the vehicle to a qualified mechanic for a full brake inspection. Never defer brake concerns to the next oil change.

How to Use This Checklist Effectively

Print this checklist and fold it into your glove box alongside your registration and insurance card — for a full list of what belongs in there, check out Documents Every Car Owner Should Keep in the Glove Box.

Work through the checklist methodically rather than from memory. If you notice something unexpected — an unfamiliar dashboard light, fluid that looks dark or low, a tire that keeps losing pressure — don't defer it. Our guide to warning lights, decoded can help you interpret what your dashboard is telling you before you visit a shop.

For tasks flagged here as requiring professional attention, bring your notes to a qualified mechanic. Describing what you observed (the color of a fluid, the location of a noise, the mileage since the last service) makes diagnosis faster and more accurate. Building seasonal checks into a consistent routine is one of the most reliable ways to extend your vehicle's life — Building a Maintenance Routine That Actually Sticks offers practical habits for doing exactly that.

Know When a Task Exceeds a DIY Check

Several items on this checklist — such as brake inspection, refrigerant checks for AC systems, and suspension assessment — involve safety-critical systems that require professional tools and training to evaluate properly. If you're uncertain about what you're seeing during any inspection, the right call is always to consult a qualified mechanic. A short shop visit for peace of mind is far less costly than a roadside failure or accident.

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