A climate that swings from -30°C to +32°C across the year, road salt for 5 of 12 months, fresh potholes every spring, humid summer heat — the Quebec climate is brutal on cars. Here's what to check and replace each season to keep yours alive.
Fall (October-November) — prep for winter
This is the most important maintenance season. What to check before the first hard freeze:
- Battery— free test. If it's more than 4 years old, test it. Below 60% health, replace before it fails at -25°C. See our winter battery guide.
- Winter tires — install between October 15 and November 15. Check tread depth: under 4.8 mm, replace. Mandatory from December 1 in Quebec.
- -40°C washer fluid — switch to winter formula before temperatures drop. Summer fluid freezes and cracks the reservoir in January.
- Wiper blades — replace if they streak. Add winter blades if your budget allows.
- Antifreeze (50/50) — check protection (should hold to at least -35°C). Level between MIN and MAX in the expansion tank.
- Cabin air filter — every 20 000-30 000 km. Doing it in the fall guarantees effective heating all winter.
Winter (December-March) — survive and monitor
Not much to replace, but a lot to watch:
- Oil level — check every 1 000 km. Cold thickens oil, and a car that slightly burns oil in summer can burn more in winter.
- Starting— if the battery struggles at -20°C but recovers after a boost, it's near end of life. Don't ignore.
- Tire pressure — drops about 1 PSI per 5°C lost. Adjust after every cold snap.
- Corrosion — wash the undercarriage when possible (3-4 times during winter). Road salt eats everything, especially brake lines.
- Heat + defrost— if hot air doesn't arrive within 5 minutes, thermostat or radiator issue. Get it checked.
Spring (April-May) — repair the winter damage
This is the season winter sends its bill:
- Summer / all-season tires — swap between mid-April and mid-May, once nights stay above freezing.
- Alignment — after a winter of potholes, check alignment. Symptoms: off-center steering wheel, uneven tire wear, car pulling to one side.
- Brakes — visual inspection. Road salt can eat brake lines or seize calipers. See our brake pads guide.
- Chassis / suspension — ball joints, tie rods, shocks. A pothole winter wears these fast.
- Full wash + wax — remove residual salt and protect paint for the warm season.
Summer (June-September) — heat and road trips
- Air conditioning — if it cools less than before, get the refrigerant recharged (R-134a or R-1234yf). An undercharged A/C system overworks the compressor and eventually kills it ($800-1500).
- Serpentine belt — visual inspection. Summer heat accelerates cracking.
- Engine air filter — if you drive dusty or gravel roads, inspect.
- Radiator — check coolant level cold. A summer overheat can destroy an engine in 5 minutes.
- Engine oil — before a road trip, check level and oil age.
All year — non-seasonal maintenance
- Oil change — per manual. With synthetic, typically 8 000-16 000 km. See our DIY oil change guide.
- Tire rotation — every seasonal swap. Keeps wear even.
- Oil + air + cabin filters — per manual intervals.
- Spark plugs — every 30 000 to 200 000 km depending on type. See our spark plugs guide.
Bottom line
A calendar is a guide — not a law. The real principle is simple: listen to your car. A new noise, a new smell, a vibration in the wheel, a warning light — these are all signals. The longer you wait, the bigger the bill. See our car noises guide if something feels off.