The air filter prevents airborne pollutants from interfering with a vehicle's engine. The filter, constructed of paper, blocks dust particles, leaves, and even insects from being sucked into the engine and doing damage. It is important to replace the air filter as needed to keep your car running at peak performance.
Should I replace the air filter at the recommendation of a service technician?
Yes.
Why should I follow the advice of a professional?
Because sooner or later the air filter will become obstructed to the point that it has an adverse effect on the vehicle's performance.
What will happen if I ignore the suggestion to replace the filter?
If the air filter becomes too plugged with dirt and grime, the engine will be incapable of drawing the necessary amount of air into the combustion chambers. This causes the engine to run richly, or become overwhelmed with gas and lack air supply. When this occurs, the vehicle will experience a reduction of power and run irregularly. You may also find that the Check Engine warning appears on the dashboard.
If you overlook the air filter for too long, your vehicle could stop running completely. Permanent damage is not too probable, but there is a slight chance that it could happen. If an air filter becomes too contaminated and damaged, it may allow destructive debris into the combustion chamber.
Should I worry about performing any maintenance on the air filter between the scheduled tune-ups?
If you really put a lot of stress on your car (e.g., driving on dirt roads or in city traffic), it is recommended that you take it in for a checkup twice as often as you normally would.
Quick tip
Checking and changing your air filter is easy to do. Buying the filter from your local auto parts retailer could be up to $10 cheaper when you take the cost of labor into account.