{"id":706,"date":"2026-10-13T10:21:07","date_gmt":"2026-10-13T10:21:07","guid":{"rendered":"https:\/\/www.way.com\/auto-repair-software\/?p=706"},"modified":"2026-10-13T15:57:54","modified_gmt":"2026-10-13T15:57:54","slug":"how-to-change-the-air-filter-in-a-car-guide-for-mechanics","status":"publish","type":"post","link":"https:\/\/www.way.com\/auto-repair-software\/guide\/how-to-change-the-air-filter-in-a-car-guide-for-mechanics\/","title":{"rendered":"How to change the air filter in a car: A step-by-step guide for mechanics"},"content":{"rendered":"\n

You might think that changing a car\u2019s air filter is no big deal, especially since this is something that DIYers try to do at home. Often enough, it\u2019s the easy tasks, the ones we rush, that can go wrong. The filter, for instance, could be placed a little off-center, or maybe the seal gets pinched under the cover. The job is done, but the engine may now be drawing in unfiltered air. To make sure this doesn\u2019t happen, here\u2019s our step-by-step guide on how you should change the air filter in a car.<\/p>\n\n\n\n

Why do cars even have air filters?<\/h2>\n\n\n\n

A car\u2019s air filter keeps bugs, dust, sand, and other debris from getting into the engine. It helps protect the engine\u2019s sensitive parts from damage. Most air filters are rectangular or square and made from a paper-like material that lets air through but blocks dirt.<\/p>\n\n\n\n

Why should a car\u2019s air filter be replaced regularly?<\/h2>\n\n\n\n

Reduces emission<\/h3>\n\n\n\n

A clogged air filter can block airflow and harm your car\u2019s emission system. This can cause your car to release more harmful substances into the air. Changing the air filter regularly helps protect the environment.<\/p>\n\n\n\n

Increases engine life<\/h3>\n\n\n\n

A clean air filter helps your engine last longer by keeping out dust and dirt. This prevents damage. Changing the air filter is an easy way to save money and keep your engine running smoothly for a long time.<\/p>\n\n\n\n

Do dirty air filters impact fuel economy?<\/h2>\n\n\n\n

Customers often ask to replace a dirty air filter to improve fuel economy. But is there solid proof that changing a dirty air filter helps fuel economy in modern cars?<\/p>\n\n\n\n

Oak Ridge National Laboratory tested cars from the 2000s and found that a clogged filter didn\u2019t make much of a difference to fuel economy<\/a>, since the engine computer adjusts to the air it gets. Those cars lost acceleration instead, and DOE has reported<\/a> 6 to 11 percent better acceleration on average with a clean filter.<\/p>\n\n\n\n

Older carbureted engines are the exception, and they did burn more fuel<\/a> when the filter clogged.<\/p>\n\n\n\n

The truth you can tell a customer who\u2019s asking is that a clogged filter makes the car feel sluggish. The engine risk comes from a filter that leaks or is missing, because dust gets into the cylinders.<\/p>\n\n\n\n

How often should you replace a car\u2019s air filter?<\/h2>\n\n\n\n

If someone asks, the usual advice is to change the air filter every 12,000 to 15,000 miles. If you drive often or in dusty areas, you may need to change it sooner. Remember to include air filter changes in your regular engine care. Here\u2019s what the top 5 car brands in the USA recommend.<\/p>\n\n\n\n

Brand<\/strong><\/td>Replace at<\/strong><\/td>Source<\/strong><\/td><\/tr>
Toyota<\/td>30,000 miles<\/td>KBB Toyota schedule<\/a><\/td><\/tr>
Ford<\/td>30,000 miles<\/td>KBB Ford schedule<\/a><\/td><\/tr>
Chevrolet<\/td>45,000 miles or 4 years<\/td>KBB Chevrolet schedule<\/a>, 2016 Equinox manual<\/a><\/td><\/tr>
Honda<\/td>15,000 miles in dusty conditions<\/td>Honda Maintenance Minder PDF<\/a><\/td><\/tr>
Hyundai<\/td>30,000 miles or 24 months<\/td>Sonata schedule<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Signs that a car\u2019s air filter needs to be replaced<\/h2>\n\n\n\n