Seasonal Car Maintenance Checklist for Mississauga Drivers

✅ Switch to Summer/All-Season Tires

Once daily temperatures consistently stay above 7°C (usually mid-April in Mississauga), switch from winter tires. Winter rubber compounds soften in warm weather, causing faster wear and longer stopping distances. Need a mobile tire change? We can help.

✅ Inspect Tires for Winter Damage

Check for bulges, cracks, uneven wear, and embedded nails from winter debris. Mississauga’s post-winter potholes are notorious for causing sidewall damage. For tire pressure guidance, read: TPMS Warning Light Guide.

✅ Wash the Undercarriage — Remove Road Salt

Road salt accumulates all winter and accelerates rust on the frame, brake lines, and exhaust. A thorough undercarriage wash in March or April removes salt before warm-weather moisture activates corrosion.

✅ Check Alignment After Pothole Season

If your steering wheel is off-centre or the car pulls to one side, a pothole likely knocked the alignment out. Misalignment causes uneven tire wear and reduces handling. Read: Spring Pothole Damage Guide.

✅ Test the Battery

If your battery struggled to start this past winter, it may have sustained permanent capacity loss. Get it tested — most auto parts stores do this free. If it tests below 80%, replace it now before summer heat accelerates the decline. Read: Battery Replacement Guide.

✅ Replace Wiper Blades

Winter destroys wiper blades — ice, road grime, and constant use wear down the rubber edge. Replace them in spring for clear visibility during April showers. Cost: $15–$40 for a pair.

✅ Check Coolant Level and Condition

Overheating is our #1 summer breakdown call. Check coolant level (engine cold) and top up if low. If the coolant is brown, murky, or has not been flushed in 3+ years, get a coolant flush. Cost: $100–$150 at a shop.

✅ Inspect the AC System

A failing AC system is uncomfortable — and it also adds strain to the engine and electrical system. If the AC blows warm or cycles irregularly, get it inspected before the heatwave hits. A recharge costs $150–$250; compressor replacement is $600–$1,200.

✅ Check Tire Pressure Monthly

Heat causes tire pressure to increase — 1 PSI per 6°C rise. Overinflated tires have reduced grip and are more susceptible to blowouts on hot pavement. Check pressure when tires are cold and adjust to the door jamb specification. For highway blowout safety, read: Flat Tire on Highway 401 or 403.

✅ Test the Battery — Again

Heat kills batteries faster than cold. Summer temperatures accelerate internal plate corrosion and fluid evaporation. A battery that survived winter may fail in July. If it is 3+ years old, test it or replace proactively. If it fails, call for a battery boost.

✅ Check Belts and Hoses

Heat degrades rubber. Inspect the serpentine belt for cracks and glazing, and squeeze coolant hoses — they should be firm, not soft or spongy. A broken belt or burst hose on the 403 in July means an immediate breakdown tow.

✅ Switch to Winter Tires by Late October

Once temperatures consistently drop below 7°C, all-season tires lose grip. Winter tires are not optional in Mississauga — they are essential. The difference in stopping distance on ice is 30–40%. Book your swap early — tire shops are fully booked by November.

✅ Get the Battery Tested

This is the single most important fall maintenance task. A weak battery that works in September will fail in December. Get a load test at any auto parts store — it is free. If capacity is below 80%, replace now. Do not wait until the first -15°C morning. Read: Why Car Batteries Die in Winter.

✅ Inspect Brakes Before Winter

Brakes are your most critical safety system — and winter conditions demand peak performance. Have the pads, rotors, and brake fluid inspected. If the brakes are squealing, grinding, or the pedal feels soft, replace them now — not on a January ice day.

✅ Check All Lights

Fall brings shorter days and earlier darkness. Walk around the car and verify every light works: headlights (low and high), taillights, brake lights, turn signals, and fog lights. A burned-out headlight in November evening rain is a visibility hazard and a ticket.

✅ Top Up Windshield Washer Fluid With Winter Formula

Switch to winter-rated washer fluid (rated to -40°C). Summer fluid freezes in the lines and reservoir. Once road salt spray hits your windshield in December, you will go through washer fluid fast — keep a spare jug in the trunk.

✅ Build a Winter Emergency Kit

Pack your trunk with: blanket, flashlight, phone charger, ice scraper, small shovel, jumper cables or a portable jump pack, kitty litter or sand for traction, and a bottle of water. If you get stranded, these items keep you safe until help arrives. Read: Stuck in Snow? Winter Recovery Guide.

✅ Monitor Battery Health Continuously

If the engine cranks slowly on a cold morning, do not ignore it — the battery is telling you it is dying. A battery boost will get you started, but the battery needs testing or replacement immediately. Read: Car Won’t Start? 7 Reasons.

✅ Check Tire Pressure Weekly

Cold air contracts — tires lose ~1 PSI per 6°C drop. A tire at 34 PSI in November can sit at 26 PSI on a January morning, triggering the TPMS light and reducing traction when you need it most. Check weekly and add air as needed.

✅ Keep the Fuel Tank Above Half

A low fuel tank in freezing temperatures can cause moisture condensation inside the tank, which can freeze and block fuel lines. Keeping the tank above half prevents this and gives you a buffer if you get stuck in traffic or a snowstorm.

✅ Clear Snow From the Entire Vehicle

Do not just clear the windshield — clear the hood, roof, trunk, headlights, taillights, and licence plate. Snow flying off your roof onto the car behind you is dangerous and illegal. Ice chunks from an uncleared roof can shatter a following vehicle’s windshield.

✅ Save a Local Towing Number in Your Phone

Before you need it: save (647) 601-6377 in your contacts as “Mississauga Towing.” When you are standing in a -20°C parking lot at 7 AM with a dead battery, you want to call a local company — not search Google with frozen fingers. For help choosing a company, read: How to Choose a Reliable Towing Company.