Vehicle shown in this step: 2009 Audi A4 Quattro 2.0L 4 Cyl. Turbo
Procedure notes
The engine air filter in your 2009 Audi A4 cleans the air that enters your engine. You should change the filter on your A4 at least once a year or every 20,000 miles, whichever comes first. If you drive in dusty or sandy conditions, you should change your filter more frequently. A dirty air filter will cause your A4 to lose 1 - 3 mpg, depending on your driving, you can save 70 - 100 gallons of gas per year simply by changing your filter regularly. The video above, shows you where the engine air filter is located in your A4 and how to change it!In addition to improving the fuel economy of your A4, regularly replacing your air filter will put less strain on your engine. These filters are fairly inexpensive, so check out our parts page for great deals and coupons on a new one (tip: buy several, when you go to check the filter on your A4, you can easily swap it for a new one if it is dirty). Be sure to adhere to a recurring schedule for your 2009 Audi A4 replacement.
查看中文对照 · Chinese translation
你的 2009 奥迪 A4 的发动机空气滤清器会过滤进入发动机的空气。 你应该每年或每 20,000 英里更换一次 A4 的滤芯，以先到者为准。 如果在尘土或沙地条件下驾驶，应更频繁地更换你的滤清器。 一个脏的空气滤清器会使你的 A4 每加仑油耗增加 1 - 3 英里，具体取决于你的驾驶习惯，只要你定期更换滤清器，每年就能节省 70 - 100 加仑的汽油。 上面的视频展示了您的 A4 中发动机空气滤清器的位置以及如何更换它！除了能提升您 A4 的燃油经济性外，定期更换空气滤清器还能减轻发动机的负担。 这些滤芯价格相当便宜，建议查看我们的配件页面，获取全新滤芯的优惠促销和优惠券（提示：购买多个，当您检查A4上的滤芯时，如果发现脏了，可以轻松更换为新的） 请务必按照定期计划为您的 2009 奥迪 A4 进行更换。