Winter Vehicle Inspection Checklist for Shops (Free PDF)

October and November bring every customer’s car into your shop for the same reason: the cold is coming. A pre-winter inspection turns that visit into a short, structured check of the systems winter hits first, with every result written down and shown to the customer before they leave. Below is the winter car inspection checklist we built from Canadian and manufacturer guidance, a free PDF you can print today, and how to offer the inspection without the hard sell.

Why winter needs its own inspection

Transport Canada tells drivers that, in addition to regular maintenance, they can bring their vehicle to a licensed facility for a winter inspection, and that a check-up by a trained technician helps make sure no important items are missed. It also points out that newer vehicles have systems a repair facility needs to check. Your customers are being told a technician’s check is worth it.

Cold goes after a few systems first. One owner’s manual (Ram 2022 2500/3500) puts the battery problem plainly: a battery loses 60% of its cranking power as its temperature drops to -18°C, while the engine needs twice as much power to crank. Tires lose about 7 kPa (1 psi) for every 5°C drop, washer fluid has to keep working at -40°C, and a block heater with a cracked cord is something to find in October, not at 6 a.m. in January.

Sources: Transport Canada, Preparing your vehicle for winter (modified October 6, 2025); Ram 2022 2500/3500 owner’s manual, battery; Transport Canada, Riding on Air (tire pressure); CAA, Winter Car Care (washer fluid).

The winter vehicle inspection checklist (43 checks)

Every item below is on the PDF. Record a result for each one (OK, Advise or Urgent) and the measurement where there is one.

Battery and Charging

Test, don’t guess: record the measured cold cranking amps against the battery’s rating, and the battery’s age from its date code. CAA notes that a battery between three and five years old could fail.

• Battery age from date code (years)
• Battery test: measured CCA vs rated CCA
• Case & terminals: corrosion, bulging, clamps
• Charging voltage at idle (V)
• Drive belt(s): cracks, glazing, tension
• EV / hybrid: 12 V auxiliary battery test

Heating and Block Heater

Heat and defrost are safety items in a Canadian winter. CAA Saskatchewan recommends checking the block heater with a tester and looking for cracks or tears in the cord before the cold sets in.

• Block heater element test (tester or ohms)
• Block heater cord & plug: cracks, fraying
• Heater output, front & rear defrost
• Thermostat: reaches operating temperature
• Radiator & heater hoses: cracks, leaks
• Radiator cap & water pump; pressure test if needed
• Cabin air filter

Tires and Wheels

Measure tread with a gauge at the inside, centre and outside grooves, as CAA-Quebec recommends. Transport Canada says pressure drops about 7 kPa (1 psi) for every 5°C, so set it cold, to the placard on the door.

• Tire type per position: winter (3PMS), M+S, all-season
• Tread depth, 3 points per tire (mm)
• Tread wear bars reached?
• Damage: cuts, cracks, bulges, embedded objects
• Irregular wear: alignment or balance needed?
• Cold pressure set to door placard (kPa)
• Spare tire: pressure & condition
• TPMS warning or sensor fault
• Matching set of 4; deepest tread on the rear
• Wheel nuts torqued to spec (N·m); re-check advised

Fluids

Read the coolant freeze point with a refractometer, the field method ASTM D3321 describes for service technicians, using the scale for the right glycol. Washer fluid should be rated for -40°C, as Transport Canada, CAA and the Government of Ontario all recommend.

• Coolant freeze point, refractometer (°C)
• Coolant level & condition; last service
• Washer fluid rated -40 °C; reservoir full
• Engine oil: level, due date, grade per OEM
• Brake fluid level & condition
• Power steering / transmission fluid; leaks

Visibility and Lights

CAA says the average wiper blade lasts only six months. Transport Canada also notes that many new vehicles aim headlights automatically and need a professional to check them.

• Wiper blades: streaks, chatter, torn rubber
• Washer pump & nozzles: spray and aim
• All exterior & interior lights
• Headlight aim
• Driver-assist cameras & sensors clean, no warnings

Brakes and Suspension

A normal brake inspection, recorded in millimetres, plus the parking brake and the front end before the roads turn to ice.

• Brakes: pad/shoe thickness (mm), rotors, pedal feel
• Parking brake holds
• Steering & suspension: tie rods, ball joints, struts

Engine and Exhaust

Transport Canada and CAA both flag exhaust leaks, which can send carbon monoxide into the cabin, and CAA suggests frequent washes, including the undercarriage, to fight rust.

• Ignition: plugs, coils/wires; hard start or misfire
• Exhaust: leaks, hangers, damage (CO risk)
• Underbody rust; undercarriage wash advised

Customer Advice

Close with two minutes of advice. CAA suggests a block heater below -15°C, and Natural Resources Canada recommends a timer set to turn on no more than 2 hours before the engine starts.

• Block heater below -15 °C; timer max. 2 h before start
• Emergency kit reviewed; missing items noted
• Fuel tank at least half full; tailpipe clear of snow

Checklist built from: Transport Canada, Using winter tires, Transport Canada, Planning your trip, CAA, Winter Car Care, CAA-Quebec, winter tire buying guide (updated October 28, 2025), CAA Saskatchewan, Government of Ontario, Winter driving, Natural Resources Canada, ASTM D3321, Michelin Canada, TRICO. Items such as steering and suspension, the parking brake and the washer pump are routine shop practice. The tread bands on the PDF are a shop convention, not a legal standard. Consulted October 11, 2026.

How to offer it without the hard sell

• Offer it when the customer books the tire changeover. The wheels are already off for the tire and brake checks, and the customer avoids a second visit. Book the extra bay time when they book, so the rush doesn’t back up.
• Give it one clear price, and tell the customer what they get: a written result for every item.
• Sort the findings into Urgent, Advise and OK. Quote the urgent items now; put the rest on the record for the next visit.
• Show, don’t tell. A photo of a cracked belt or a battery test printout does the selling for you.
• Keep the sheet. Next fall, the customer’s history tells you what was advised and never done.

In Garage, inspection checklists and technical reports with photos are part of the Premium plan, and you build the checklists yourself, so these 43 checks can become your winter template. On any plan, you can send the repair order and the estimate to the customer by WhatsApp, iMessage or email, and the vehicle’s history stays on file. During the 7-day trial every feature is unlocked, including Premium, so you can run this season’s first winter inspections on it.

Frequently asked questions

What should a winter vehicle inspection include?

The battery and charging system, the block heater and heating, the tires (type, tread, pressure and damage), the coolant freeze point and the other fluids, wipers and lights, the brakes, the exhaust, and a short review of the customer’s emergency kit. The checklist above covers all of it.

What tread depth is enough for winter driving?

The sources differ. Transport Canada advises against using tires worn close to 4 mm (5/32″) on snow-covered roads. CAA-Quebec recommends starting the winter with at least 6/32″ (about 4.8 mm). Michelin Canada calls 4/32″ (3.2 mm) the practical safe minimum for winter tires. On our PDF, 4.8 mm or more is OK, 4.0 to 4.7 mm is Advise and under 4 mm is Urgent for snow. Those bands are a shop convention, not a legal standard; check your province’s rules for any legal minimum.

When should customers plug in a block heater?

CAA suggests considering a block heater when the temperature drops below -15°C. Natural Resources Canada recommends a timer set to turn on no more than 2 hours before the engine starts.

How do you test coolant before winter?

With a refractometer that reads the freezing point, the field method described in ASTM D3321. Use the scale for the right coolant type (ethylene or propylene glycol) and compare the reading with the target in the owner’s manual or on the coolant label.

How often should wiper blades be replaced?

CAA says the average wiper blade lasts only six months, and TRICO gives the same general rule. Replace blades that streak, chatter or have torn rubber before the first snow.

Is this checklist a provincial safety inspection?

No. It is a service checklist for a pre-winter inspection. Provincial safety inspections, where they exist, follow their own standards and forms.