Winter car checklist: tyres, battery, coolant, and the mountain-area rules
Updated · Autofy
Winter car checklist: tyres, battery, coolant, and the mountain-area rules
Before winter, check your tyres (tread, pressure, and the 3PMSF marking if you drive in the mountains), your battery, your coolant and your brake fluid. In France, from 1 November to 31 March, vehicles driving through signposted mountain zones in 34 départements must either carry removable anti-skid devices (chains or textile socks) or be fitted with four winter tyres.
The rule for mountain areas
Since 1 November 2021, France has a winter-equipment rule for mountain roads. It applies every year from 1 November to 31 March, in 34 départements across the Alps, the Pyrenees, the Jura, the Massif central and the Vosges.
- Who: vehicles with four wheels or more — cars, vans, motorhomes, coaches and lorries.
- Where: on the roads and in the communes listed by the local prefect, at entry points marked by road signs with a panel stating the winter period. Signage is what makes it enforceable.
- What equipment: either four winter tyres, or removable anti-skid devices (metal chains or textile snow socks) that can fit at least two drive wheels, carried in the vehicle.
A winter tyre in the sense of the rule carries the 3PMSF marking (a mountain with a snowflake). It is the only marking that guarantees a standardised winter performance.
If you only cross a mountain zone a few times a year, carrying socks is the light option; if you drive there often, four winter tyres or metal chains are more practical. Check the current list of communes on the official pages before you go.
What to check before the cold
The cold doesn't create faults; it reveals the ones that were waiting.
Tyres
Check tread depth and age (see when to replace your tyres). Tyre pressure falls as the temperature drops, so a warning that appears on the first cold morning is common: why the light stays on and how to reset it.
Battery
A weak battery often survives summer and gives up on the first frost. If yours is several years old, have it tested before it strands you: battery lifespan and how to extend it.
Coolant
It protects the engine from overheating and from freezing. Check the level and the date of the last change: what the coolant light means.
Brake fluid
It absorbs moisture over time and is rarely changed on time — a forgotten item that costs braking performance: when to change it.
Turn the list into due dates
Those four items are all parts with an interval, in kilometres and in time. Rather than remembering, log the date of your last change and let the app count. Try the free maintenance calculator to see when each one falls due.
Autofy tracks the battery, coolant, brake fluid, tyres and brakes with a gauge each, and lets you know when one gets close.
Source: Service Public — winter tyres and chains: what are your obligations from 1 November (winter 2025–2026 edition; the period and principle recur each year).
Frequently asked questions
When does the winter-equipment rule apply in France? Every year from 1 November to 31 March, in the 34 départements of the mountain massifs (Alps, Pyrenees, Jura, Massif central, Vosges), on the roads and communes listed by the local prefect and indicated by road signs.
Are winter tyres compulsory everywhere in France? No. The obligation applies in the signposted mountain zones. Outside those zones no winter equipment is required by this rule, though winter tyres still improve grip in the cold.
What counts as a winter tyre? A tyre carrying the 3PMSF marking (three-peak mountain snowflake), the only marking that guarantees a standardised winter performance, on all four wheels. Alternatively you can carry chains or textile snow socks that fit at least two drive wheels.
Which parts should I check before winter? Tyres (tread and pressure), battery, coolant and brake fluid: the four things that fail more noticeably or dangerously in the cold.