Is your car emitting more pollutants than usual?

Vehicle pollutant emissions are one of the main factors affecting the air we breathe. If you notice your car is polluting more than usual, do not ignore it: there are solutions that can reduce that impact and spare you problems at the next ITV (Spain's mandatory vehicle inspection).

In this article we explain the main causes of excessive emissions and how to cut your car’s pollution, extend its useful life and help keep the environment cleaner.

Why is it important to control car emissions?

Environmental and legal impact

Pollutant gases such as CO2, NOx or fine particles affect the environment and public health directly. Exceeding the allowed levels can also lead to fines and even immobilization of the vehicle in some low-emission zones.

Risk of failing the ITV on emissions

The ITV (Inspección Técnica de Vehículos, Spain's mandatory vehicle inspection) checks that emissions are within legal limits. If your car exceeds them, it will be rejected. That not only creates extra costs, but also the obligation to repair before you can drive legally.

Common causes of excessive pollutant emissions

1. Faulty or damaged exhaust system

A cracked exhaust pipe or a catalytic converter in poor condition can release harmful gases directly without proper filtering.

2. Clogged air filter

When the filter is dirty, the engine gets less oxygen than it needs, which produces incomplete combustion and more pollution.

3. Poor engine maintenance

Worn spark plugs, old oil or dirty injectors raise fuel consumption and, therefore, emissions.

4. Aggressive driving style

Harsh acceleration, constant hard braking or driving in low gears raises fuel consumption and the emissions level.

5. Heavy use of the air conditioning

Although necessary in summer, excessive use means more work for the engine, which translates into more consumption and emissions.

6. Tires with low pressure

Incorrect pressure creates more rolling resistance, so the car uses more fuel and pollutes more.

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How to reduce your car’s pollutant emissions

1. Check the exhaust system and catalytic converter

Make sure there are no leaks or visible damage. The catalytic converter must be in good condition to filter exhaust gases correctly.

2. Regular engine and filter maintenance

Change the air filters and oil regularly. Use the right oils and follow the manufacturer’s maintenance schedule.

3. Efficient, moderate driving

Driving at a steady speed, anticipating braking and using higher gears at low revs can cut emissions drastically.

4. Sensible use of the air conditioning

Switch it on only when needed. Air the car before starting it to reduce the initial load.

5. Check tire pressure

Check the pressure at least once a month. Properly inflated tires improve efficiency and reduce gas emissions.

Extra ways to minimize pollution

Use additives to clean the system

There are specific additives that help clean the injectors, the exhaust system and the catalytic converter, improving combustion.

Clean or replace the particulate filter

If your car has one (especially diesel), make sure it is clean or renewed to avoid blockages and excessive emissions.

How can a timely ITV help you?

Official emissions check

The ITV measures emissions with calibrated equipment that detects problems that can go unnoticed day to day.

Technical recommendations to correct faults

If there is a minor fault, technicians can give you guidance to fix it before it becomes a costly breakdown or a rejection.

When should you go to the workshop?

Symptoms of a serious mechanical problem

A strong gasoline smell, excessive smoke from the exhaust or power loss are clear signs that something is wrong.

Benefits of a professional inspection

A specialist workshop can find and fix the exact source of the emissions, avoiding larger costs later.

Breathe easy: look after your car, look after the air

Looking after your vehicle is not only an investment in its performance; it is also a commitment to the environment and your safety.