What happens if you don't change your air filter in your car?

Author: Aletha Nicolas II  |  Last update: Tuesday, March 11, 2025

Neglecting your air filter can lead to several issues. Over time, it can cause reduced fuel efficiency, diminished horsepower, and even engine damage. Keeping up with this small maintenance task can save you from more significant, expensive problems.

How long can you go without changing air filter in car?

It's recommended that you change your car's air filter every 15,000 to 30,000 miles, depending on how often you drive and the type of environment you live in. During normal driving conditions, changing the air filter every 20,000 miles will usually suffice.

What happens if you drive with a bad air filter?

Performance Issues: Lack of a proper air filter can cause the engine to run poorly, resulting in rough idling, reduced power, and potential stalling. Emissions: A compromised air intake can lead to increased emissions, which may cause your vehicle to fail emissions tests and contribute to environmental pollution.

How long can you go without changing an AC filter?

Most manufacturers recommend changing basic fiberglass filters every 30 days. Higher-quality pleated filters should generally be changed every 90 days, though they can potentially last up to six months.

How do I know when my car air filter needs replacing?

7 Signs You Might Need to Replace Your Car Air Filter
  1. Reduced Fuel Efficiency. The most common sign is a decrease in gas mileage. ...
  2. The Engine Light Is On. ...
  3. The Air Filter Is Dirty. ...
  4. Jerking Movements When You Accelerate. ...
  5. Misfiring and Starting Issues. ...
  6. Strange Engine Sounds. ...
  7. Black Smoke or Flames From the Exhaust Pipe.

What happens if I don't replace my Cabin Air Filter?

What are the symptoms of a dirty air filter?

How Can You Tell if Your Air Filter Is Dirty?
  • Reduced Gas Mileage. ...
  • Strange Engine Noises. ...
  • Decreased Performance. ...
  • Check Engine Light Comes On. ...
  • Black Smoke or Flames in the Exhaust. ...
  • The Smell of Petrol in the Exhaust. ...
  • Your Engine Misses or Misfires. ...
  • Loss of Acceleration.

What happens if air filter is not changed?

Poor Air Quality

If the filter is too dirty to do its job, those unwanted particles can collect in your ductwork and cling to the internal components of your HVAC system, ultimately diminishing air quality throughout your house.

What happens if you don't change your car AC filter?

Reduced Efficiency

This can result in a noisy or ineffective air conditioning system. This can be a huge pain during those hot summer months - if your cabin air filter is full of debris and dirt, it'll take way longer for your cabin to cool down.

How often should car air filters be changed?

Depending on your driving habits, you should change your air filter every 12 months or 12,000 miles. If you do a lot of stop-and-go driving in a dusty or polluted area, you'll need to change it more often. To save yourself some money, you can even do it yourself.

Can a dirty filter cause AC to shut off?

How You Can Maintain Your AC Filter. While dirty air filters can stop an AC from working, there are many ways to keep your air conditioner well taken care of and working efficiently for a longer time.

Can you get sick from not changing air filter in car?

If you breathe in air that has not been filtered or is filtered through a dirty cabin air filter, you may notice that you get sick more often, have difficulty taking deep breaths, and have allergies that are exacerbated. Your car's health may be at risk, too.

How much does it cost to replace an air filter in a car?

Most engine air filters will cost between $20 to $85, depending on the year, make, and model of your vehicle, and whether you do it yourself or take your vehicle to the dealer or a mechanic.

Can a dirty air filter make your car shake?

Engine misfires and violent vibrations can be caused by an air filter that is dirty and clogged.

What happens if you don't change your AC air filter?

If you don't change your air filter, it can quickly become clogged with dust and debris, preventing proper air filtration. This leads to a variety of issues for your HVAC system including system inefficiency, higher energy bills, inadequate air quality, and ultimately failure.

Can I clean my car air filter instead of replacing it?

Cleaning the air filter only improves its appearance. When should an air filter be replaced? The air filter should be replaced after the period indicated by the vehicle manufacturer.

Can I drive with a dirty air filter?

Can Driving with a Dirty Air Filter Damage My Engine? Yes, it's possible. If an air filter isn't functioning as it's meant to, it could be letting debris, dust particles, and other pollutants into your engine, potentially causing damage.

Is it bad to not change the air filter on a car?

As your air filter catches unwanted particles, it's also helping your engine pull in the clean air it needs to operate effectively. But when the filter wears down and gets dirty, it can choke off your car's air flow and hurt your engine's acceleration power.

How can I tell if my car needs a new air filter?

6 Signs It's Time to Replace Your Car Air Filter
  1. A Dirty or Discolored Filter. One of the easiest ways to spot a filter that needs changing is to actually take a look at it. ...
  2. Odd Engine Noises. ...
  3. Check Engine Light. ...
  4. Poor Performance. ...
  5. Weak Fuel Economy. ...
  6. Black Smoke from the Exhaust.

How long can you go without changing air filter?

How Often Do I Need to Change Out My Air Filter? Generally, most air filter manufacturers and HVAC companies recommend changing your air filter every 90 days, or 3 months. That can change based on where your home is located (ex. dusty, dry climates), if you have any pets, and the age of your system and equipment.

What happens if you haven't changed your AC filter in a year?

Air filters that are overdue for a change are a common cause of HVAC system failure. Over time, dirt builds up in the heating and AC filters, causing components such as the motor to go into overdrive, which may eventually overheat your unit.

Will my AC work better if I change filter?

A new, clean new air filter keeps your HVAC unit running smoother and running longer, extending its useful life.

How urgent is cabin air filter replacement?

The cabin air filter replacement interval can vary depending on your exact vehicle and driving conditions. However, the general rule of thumb is to replace your cabin air filter every 15,000 miles or so. We suggest you reference your owner's manual or speak to our team of experts for specifics.

What happens to a car with a bad air filter?

You may notice a decrease in power, sluggish acceleration, or a general lack of responsiveness from your vehicle. Most vehicles require 14.7 parts of air to 1 part of fuel. If you limit the air, the air/fuel mixture in the chamber won't be correct. The engine will lose power, especially on acceleration.

Will air stop working if filter is dirty?

Is my AC not working because of the filter? Potentially, yes. While there are a whole host of issues that could cause problems with your air conditioning system, a dirty air filter should be the first thing to check if your central air conditioning unit isn't working as properly as it should.

What damage might occur without an air filter?

Without an air filter in place, the engine may also be sucking dirt and debris in at the same time. This can cause damage to internal engine parts, such as valves, pistons and cylinder walls. The result is excessive oil consumption, poor engine performance, and eventually engine failure.

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