Subaru Engine Air Filter Buyer's Guide

If you’re a Subaru owner who’s looking for more information about engine air filters, you’re in luck. This buyer’s guide is just what you need. In this guide, we’ll:

  • Discuss what engine air filters are.
  • Help you determine whether it’s time to replace an engine air filter.
  • Compare OEM and aftermarket engine air filters.
  • Talk about how to replace an engine air filter.

If you still have unanswered questions upon finishing this guide, we’ll be glad to answer them for you if you reach out to us.

Engine Air Filters: the Basics

Dirty subaru filter

Image Credit: Engineering Explained

So the first question you might be asking is, “What is an engine air filter and why does my Subaru have one?”

An engine air filter is a square or rectangular frame with pleated filter material inside. The purpose of having an engine air filter in a car is to clean the air before it enters the engine. Your engine needs clean air because dust and dirt passing through the engine will wear out the components faster than normal.

For a more thorough explanation on engine air filters and how they work, take a look at this article: What You Need to Know About Engine Air Filters

When to Replace a Subaru Engine Air Filter

The engine air filter may seem like a simple part, but it plays a huge role in your engine’s health. That’s why it’s so important to replace your engine air filter at regular intervals (usually between 15K and 30K miles). If you're not sure if your engine air filter still has some life left in it, you can open the hood, remove the air filter from the air filter box, and then visually inspect it.

This guide has a great set of steps on inspecting your engine air filter: When to Replace a Subaru Engine Air Filter

OEM Vs. Aftermarket Engine Air Filters

If you're wondering if aftermarket engine air filters are better than OEM ones, we got you covered with this comparison guide: Are OEM Subaru Engine Air Filters Better Than Aftermarket? 

To sum it up, the comparison guide concludes that OEM engine air filters are the far superior option in terms of:

  • Fitment
  • Material quality
  • Pleat count

How to Replace an Engine Air Filter

Replacing your engine air filter is as easy as checking it. Basically, you just have to pop the hood, remove the old engine air filter from the air filter box, and then put the new filter in the air filter box. It's certainly a task you can do at home.