The economical Subaru Impreza has always been a dependable, gas-sipping fuel miser. You wouldn't want this finely-tuned economy car to turn into a gas hog for want of an easily replaced part that costs under $20, though. By itself, a dirty air filter may not cause a dramatic drop in fuel economy, but it will still waste as much as 5% of its gas - and at today's pump prices, that can add up in a hurry! The Subaru Impreza Air Filter is an important component of the fuel system, as the fuel needs to be mixed with oxygen in order to combust in the cylinders.

Without an air filter, the life of your engine would be shortened by several thousands of miles. On the other hand, a dirty air filter may continue to protect the Subaru Impreza engine from dust and contamination, but it will ultimately suffocate it by preventing air from entering the fuel mixture.

The result is a fuel-air mixture that is too "rich" - in other words, contains too much fuel and not enough air. This, in turn causes the engine idle to run faster than necessary, wasting fuel. Eventually, this can cause carbon build-ups which interfere with valve operation and can lead to many other problems. A new Subaru Impreza Air Filter should be installed once a year or every 10,000 miles. When it's time for that new Subaru Impreza Air Filter, shop our online catalog for the lowest prices. We carry a complete line of genuine, factory-authorized Subaru Impreza parts for every repair at discounts you won't find anywhere else.If you do, tell us - we'll meet it or beat it!