Air Filter Issues – What They Are and How to Fix Them

If your car feels sluggish, smells odd, or you hear strange noises, the air filter could be the culprit. It’s an inexpensive part, but a dirty or damaged filter can sap power, waste fuel and even damage the engine. The good news? You can spot most problems in minutes and fix them yourself.

How to Spot Air Filter Problems

There are three tell‑tale signs that your filter needs attention:

• Reduced power or acceleration. A clogged filter limits airflow, so the engine can’t breathe properly.
• Unusual engine noises. A whistling or sputtering sound often means air is trying to get through a blocked filter.
• Black, oily, or torn filter media. Pull the filter out and look at it. If it’s covered in soot, oil, or has ripped fibers, it’s time for a clean or swap.

Inspection only takes a minute. Open the air box (usually a plastic container on top of the engine), unclip the filter and give it a visual check. No tools required.

Fixing and Maintaining Your Air Filter

Once you know the filter is the issue, decide whether to clean or replace it. Reusable cotton or foam filters can be washed, but paper filters are meant for one‑time use.

Cleaning a reusable filter: Spray a low‑pressure hose to knock off loose debris, then apply a dedicated filter cleaner. Let it soak for a few minutes, rinse gently, and let it dry completely before adding a light oil coating (if the filter type calls for it).

Replacing a paper filter: Slip the new filter in the same orientation as the old one—most have an arrow showing airflow direction. Close the air box, snap the clips back, and you’re done. It costs under £10 and takes less than five minutes.

Even if you’re not a DIY fan, a quick visual check can tell a mechanic where to focus, saving you time and money.

To keep issues at bay, stick to a simple routine:

• Check the filter every 6‑12 000 km (or every oil change).
• Replace paper filters at least once a year, sooner if you drive dusty roads.
• Clean reusable filters every 3‑4 months, especially after off‑road trips.

Good air flow also means better fuel economy and a longer‑lasting engine. It’s a tiny part that makes a big difference.

Remember, the air filter is the first line of defense for your engine. Keep it clean, replace it when needed, and you’ll notice smoother acceleration, quieter operation, and possibly lower fuel bills. Next time you feel a dip in performance, open the air box—chances are the answer is right there.