How to change your car's cabin air filter to protect against harmful allergens and bacteria

February 2024 · 2 minute read

OLD and dirty cabin air filters in your car could be holding onto harmful bacteria and spreading it throughout your motor.

And as the weather heats up, hay fever suffers could be at particularly high risk if they don't replace the part regularly enough.

The cabin filter is designed to keep the air coming out of your car's vents clean and keep out pollutants like dust, pollen, smog and mould spores.

They also stop leaves and other unwanted debris from blocking up the air conditioning system.

Drivers are urged to change their cabin filters at least every 12 months or every 10,000-15,000miles - or every 5,000miles if you drive daily or live in an area with a high pollen count.

It's especially important for hay fever sufferers, as filters can become blocked with 'pollen bombs' triggering nasty reactions.

Severe hay fever sufferers should change filters before and after the summer season, especially those who use their car often for work, like van drivers.

How do I replace my cabin air filter?

  • Check your owner's manual to locate the cabin air filter. In most models, it will be behind the glove box or under the dashboard.
  • Slide out the old tray and take note of which way the air flows through it. You will need to install the new filter in the same direction.
  • Use a vacuum to remove any left over dust, leaves or insects stuck in the cabin.
  • Slide the new air filter into the cabin, making sure the flow arrows are facing in the same direction as the old filter.
  • Depending on when your air filter is located, re-install the cover and secure the glove box or dashboard.

    • your guide to car maintenance

    How much does it cost and how long will it take?

    Changing a filter usually takes no longer than 30 minutes - and they are normally found underneath the glovebox compartment.

    Depending on the type of car you have, filters can cost as little as £10.

    Most car part retailers will stock replacement filters.

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