• Discolored Filter 

If you notice that your car’s air filter is discolored or if you see signs of dirt, it might be time to replace it. A new filter is white or off-white, but over time it will start to gather dust and other debris. When your air filter is dirty, it prevents oxygen from getting into the engine. This can cause a decrease in your car’s fuel efficiency and it can also lead to reduced horsepower. You can check for a discolored filter by physically looking at it under good light. You can also do a visual inspection by opening the bonnet and taking a look at it. 

• Check Engine Light 

The check engine light is a warning signal from your vehicle’s computer that there may be an issue with your car’s emissions control system. The computer monitors all input signals and if any of them exceed government-mandated limits, it will turn on the light. Your car’s air filter is no exception. If the air filter gets dirty, it can cause the check engine light to illuminate. 

• Engine Noises 

If you notice that your car is making strange engine noises, it could be a sign that your air filter needs to be replaced. The air filter is a crucial part of your car and is located near the engine in a snap-off plastic housing. The air filter helps to ensure that all of the fuel inside your engine is properly burnt and doesn’t leave any soot residue behind. If your air filter becomes clogged, it will prevent the oxygen from getting into the engine properly. This will cause the engine to make a variety of different sounds as it struggles to function properly. 

• Poor Airflow 

When your car’s AC filter becomes clogged, it can cause the airflow to slow. This is a problem because it makes the AC system work less efficiently and can lead to costly repairs. If you notice that the AC system isn’t blowing out as much air as it used to, your filter needs to be replaced. Changing the filter is an easy, inexpensive maintenance task and can have your car working again in no time at all!