When should I change the filters in my car?

Here are the 4 main filters present in a car:

• The air filter;
• The fuel filter;
• The oil filter;
• Cabin filter.

Air filter

The air filter protects against particles that could dirty or damage the engine. The air filter can filter dust, sand and insects from the air sucked into the radiator grille. The engine stays clean longer. The air filter also helps reduce vehicle fuel consumption by adjusting the air/fuel ratio during combustion.

Fuel filter

The fuel filter collects dirt, particles and impurities from petrol or diesel to prevent early engine clogging. It also prevents water from entering the injection system during condensation. Diesel filters are more complex and bulky than petrol filters.

Oil filter

The 4 to 8 litres of oil circulating in the engine collect impurities and prevent premature wear by ensuring proper lubrication of the parts. The greasy liquid gets purified by the oil filter, which allows the oil to retain its cleaning properties for longer.

Cabin air filter

The cabin filter is a critical element for the comfort and safety of motorists. It ensures good quality air in the interior by filtering out external particles and pollution, especially pollen. It is, therefore, essential in the event of seasonal allergies, hot weather or coping with traffic jams.

The maintenance logbook, issued by the garage, makes it possible to track the frequency of change required for the various filters. A diesel filter should be changed every 50,000 km, while a petrol filter requires changing every 80,000 km. Oil and air filters are generally changed every 10,000 to 15,000 km. As for the cabin filter, changing every 2 years is recommended.

There are also warning signs to notify when you should change your filters:

• over-consumption of fuel due to a clogged air filter;
• a loss in power caused by a saturated diesel filter;
• ignition problems due to a clogged fuel filter;
• jerky acceleration due to failure of the air or fuel filter;
• the particle filter indicator will light up when it becomes clogged.

The failure to change filters on time can cause excessive engine wear, engine damage and possible breakdowns. It is, therefore, paramount to ensure filters serviced in good time.

Using the car’s technical logbook, you can change the air filter and cabin filter yourself. The first is located under the bonnet, while the second is accessible by removing the glove compartment. For fuel and oil filter changes, it’s best to consult a professional. This operation is generally carried out by the garage when the oil is changed. It ensures a longer engine life and proper regulation of fuel consumption.