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2003 Ford Focus
Air Filters

Not sure which 2003 Ford Focus Air Filters are right for you? We have over 14810 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:

"As soon as i installed the filter and went for a drive i could tell a big diffrence. The car didnt feel like it was laging anymore." —Michael C from El Paso, TX bought a K&N Air Filters for a 2003 Ford Focus.

In addition to Ford Focus Air Filters, you may also enjoy one of these popular products: BedRug VanRug Cargo Mat, Banks EconoMind Tuner, Covercraft Truck Stop Cargo Bars.
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Customer Reviews

Injen Hydro Shield

Does the job!

I received my hydro shield about a week ago and I immediately took it out of the packaging and straight to my kitchen. I figured i would test it. I put it around my fist and put my hand in water and WaLa my hand was dry. I also held it under a run faucet and discovered in order for water to get through, the water hitting it would have to be very concentrated with a bit of pressure. So installed it on my Focus and there has been ALOT of rain here lately and because of the Injen HydroShield I have had no problems. Thanks INJEN for a quality product! View more reviews...
Posted By Adam S (Spring Hill, FL) / July 12, 2008
2003 Ford Focus
Injen Replacement Air Intake Filters

Easy and Fast

Good buy for the price, as long as you know what size your intake is, its easy and fast! View more reviews...
Posted By Matthew C (Chattanooga, TN) / August 15, 2006
2003 Ford Focus
K&N Cold Air Intake Replacement Filters

Regular Maintenance

original filter had been in place for 4 yrs with nearly 50,000 miles on it. i noticed a decline in performance & fuel economy. ordered a replacement filter, easy install and back to good running health in no time. K&N is GOOD for your engines. I would recommend it to anyone. View more reviews...
Posted By Terry S (HANOVER, VA) / December 16, 2022
2008 Ford F-250

From our experts

Monday, December 10, 2018

What Do Air Filters Do?

How Air Filters Work The internal combustion engine in your vehicle is really just a big, complex air pump. Air gets sucked in, mixed with fuel, burned and sent back out in the form of exhaust. But since air around motorways tends to be dusty, dirty, debris-laden, there needs to be a filtration device to […] The post What Do Air Filters Do? appeared first on AutoAnything Resource Center.
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