Hover over the image to zoom in
Share this:

Purolator Breather

Part No. B20009 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

Have you noticed the small filter located in the air filter housing? Have you ever wondered what it’s for? Or have you possibly thrown it away? That small filter is known as a breather. Breathers, also known as emission control filters, filter fresh air that’s drawn into the engine’s crankcase. Because the engine must breathe to purge itself of fuel and water vapors, breathers are used in conjunction with the PCV valve. Although small in size, Purolator breathers are big in importance. Like any other filter, the breather is used to trap harmful contaminants and prevent them from damaging the engine. Failure to change the breather will allow unfiltered air (with all of its contaminants and dirt) to be drawn into the engine crankcase which can cause engine damage. Generally, the breather element should be changed every 12,000 miles - however, check with your vehicle manufacturer's recommended change interval as it may vary. The simplest recommended plan of preventive maintenance is to change the breather element at the same time the air filter is changed. This eliminates trying to juggle and anticipate two different change intervals, and it's convenient because you'll be able to access two filters in the air filter housing at once. Not all vehicles are equipped with a breather element. Use the Purolator Application Guide or contact the Pros to find out if your vehicle has a breather. If it does, visit your favorite automobile parts retailer and ask for a Purolator breather filter today!

Product Features:
  • Traps harmful contaminants
  • Prevents harmful contaminants from damaging the engine
Back To Top
Height:1.5 in
Length:3.95 in


by PowerReviews

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top

(3 of 6 customers found this review helpful)


Does the job


from North Carolina

About Me Auto Enthusiast, Casual Driver, Mechanic, Truck Enthusiast

Level 5


  • Easy To Install


    Best Uses

    • Everyday Driving
    • Replacement
    • Restoration

    Comments about Purolator Breather:

    Comes with the clip and fits my 4bbl small block chevy perfectly. Happy with the purchase and the buy online with instore pick up.

    Comment on this review(earn points)

    Do you have questions about this product?(earn points for answers!)


    Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      does this come with the clip or do i have to purchase separately?
      Asked on 10/3/2013 by ko from petersburg, va

      1 answer



        Hi Ko, the Purolator Breather (Part No. B20009) does not include the clip. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

        Answered on 10/4/2013 by Steve from AAP
    Displaying question 1

    Do you have a question about this product? 

    Create or view your online garage

    Check out the specials in our monthly flyer

    Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.