Using an air filter that is not the correct size for your car can have serious repercussions for your vehicle's air conditioning system. If the filter is too small, it won't cover the entire space and could let dust and dirt through, leading to a buildup of dust on the motors and fans of the air conditioning system. This can cause unusual noises, reduced fuel economy, and decreased engine life. It is essential to check the manufacturer's specifications or ask an air conditioning technician to help you choose the right product.
Most manufacturers suggest replacing the air filter every 12,000 miles (approximately 19,000 km) or every 12 months, whichever comes first. It is a common misconception that using an air filter with a higher MERV (minimum reported efficiency value) rating is the best option. However, if you live in an agricultural area or any area with a lot of dust or impurities in the air, you should consider changing your air filter more often. If you hear unusual noises, particularly when coughing, bursting or spitting, it means that the engine is not getting enough air flow, so the air filter needs to be changed. A clean, properly installed air filter improves fuel economy, increases engine life, reduces emissions, and increases acceleration.
Regardless of the type that is best for your individual climate system, it is important that you change or clean your air filter regularly. A visual inspection of the air filter under bright light will show a lot of dirt, but not all the tiny particles can be easily seen. If the light comes on, check the air filter to see if it needs to be changed before carrying out other diagnostics.
