Fall Car Maintenance Checklist for Ontario

September and October are when you prepare your car for what Ontario is about to throw at it. The list is not long, but every item matters. Skipping any of these is how people end up stranded with a dead battery in January or sliding through an intersection on bald all-seasons.

1. Battery Test

Cold weather reduces battery capacity by up to 50 percent. A battery that starts fine in September may fail on the first -20°C morning. Most batteries last 3 to 5 years in Ontario. Get a free test at Canadian Tire, NAPA, or PartSource. If it tests marginal, replace it now ($150 to $250 installed) rather than waiting for it to strand you. See our battery guide.

2. Book Your Winter Tire Swap

Book now for late October installation. September is also when tire manufacturers run $70 to $100 rebates. See our timing guide and tire recommendations.

3. Fluids

• Oil: If your next change falls in winter, do it now. Use synthetic oil (0W-20 or 5W-30) for cold-start protection.
• Coolant: Test with a hydrometer ($8 at any parts store). It should protect to at least -40°C. A coolant flush is $100 to $150 at Ontario shops.
• Washer fluid: Switch to -40°C rated winter fluid. Stock two extra jugs in the trunk.
• Brake fluid: If it has been 2+ years, consider a flush ($80 to $120). Moisture in brake fluid reduces performance in cold.

4. Brakes

If you hear any squealing, grinding, or pulsing, get them fixed before winter. You need maximum braking performance on snow and ice. A fall brake inspection is $0 to $30 at most shops.

5. Wipers and Lights

Replace wiper blades ($30 to $60 for a set). Consider winter-specific blades with a rubber boot that prevents ice buildup on the frame. Check all headlights, taillights, and turn signals. Winter means more dark-driving hours and reduced visibility.

6. Rustproofing

Book your annual oil spray before the first snowfall. Rust Check and Krown appointments fill up fast in October. Annual treatment costs $130 to $170 and is the single best investment for preserving your vehicle's body and undercarriage in Ontario.

7. Emergency Kit

Put your winter emergency kit in the trunk: blanket, flashlight, snacks, phone charger, small shovel, and jumper cables or a portable jump starter ($80 to $120).

8. Heating System

Run your heater and defroster at full blast now to confirm they work properly. A heater core replacement in November when every shop is busy is $500 to $1,200 and a week without your car. See our guide on cold weather and your engine.