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Upgrade your vehicle's airflow and engine performance with the K&N Engineering Part Number knn33-2945 high-flow reusable air filter. Designed specifically for select Audi A4 and A5 Quattro models, this drop-in replacement filter features layered, oiled cotton media that efficiently captures contaminants while maximizing airflow. Its innovative design promotes increased horsepower and improved acceleration, helping your engine operate at its peak efficiency. The filter is engineered for easy installation directly into your factory air box, making it a straightforward upgrade for enthusiasts seeking enhanced engine response without complex modifications. Backed by K&N's 10-Year/Million Mile Limited Warranty, this filter is built to last for the entire lifespan of your vehicle, providing consistent performance and engine protection. Whether you're looking for increased power or a reliable, eco-friendly filter option, this reusable filter offers a durable and cost-effective solution. Its construction not only boosts engine output but also ensures superior filtration to keep your engine clean and running smoothly over time. Ideal for daily driving or performance tuning, the K&N high-flow air filter is a popular choice among automotive enthusiasts seeking quality and reliability. With its proven design and extensive warranty coverage, this filter delivers long-term value and peace of mind for your vehicle's maintenance needs.
Features:
Fitment:
2009 Audi A4 Base
2009 Audi A4 Quattro Avant
2009 Audi A4 Quattro Base
2010 Audi A4 Base
2010 Audi A4 Quattro Avant
2010 Audi A4 Quattro Base
2010 Audi A5 Cabriolet
2010 Audi A5 Quattro Base
2010 Audi A5 Quattro Cabriolet
2011 Audi A4 Base
2011 Audi A4 Quattro Avant
2011 Audi A4 Quattro Base
2011 Audi A5 Cabriolet
2011 Audi A5 Quattro Base
2011 Audi A5 Quattro Cabriolet
2011 Audi Q5 Premium
2011 Audi Q5 Premium Plus
2012 Audi A4 Base
2012 Audi A4 Quattro Avant
2012 Audi A4 Quattro Base
2012 Audi A5 Cabriolet
2012 Audi A5 Quattro Base
2012 Audi A5 Quattro Cabriolet
2012 Audi Q5 Premium
2012 Audi Q5 Premium Plus
2013 Audi A4 Base
2013 Audi A4 Quattro Base
2013 Audi A5 Cabriolet
2013 Audi A5 Quattro Base
2013 Audi A5 Quattro Cabriolet
2013 Audi allroad Premium
2013 Audi allroad Premium Plus
2013 Audi allroad Prestige
2013 Audi Q5 Hybrid Prestige
2013 Audi Q5 Premium
2013 Audi Q5 Premium Plus
2014 Audi A4 Base
2014 Audi A4 Quattro Base
2014 Audi A5 Cabriolet
2014 Audi A5 Quattro Base
2014 Audi A5 Quattro Cabriolet
2014 Audi A6 Premium
2014 Audi A6 Premium Plus
2014 Audi allroad Premium
2014 Audi allroad Premium Plus
2014 Audi allroad Prestige
2014 Audi Q5 Hybrid Prestige
2014 Audi Q5 Premium
2014 Audi Q5 Premium Plus
2014 Audi Q5 Prestige
2015 Audi A4 Premium
2015 Audi A4 Premium Plus
2015 Audi A4 Prestige
2015 Audi A4 Quattro Premium
2015 Audi A4 Quattro Premium Plus
2015 Audi A4 Quattro Prestige
2015 Audi A5 Quattro Premium
2015 Audi A5 Quattro Premium Plus
2015 Audi A5 Quattro Prestige
2015 Audi allroad Premium
2015 Audi allroad Premium Plus
2015 Audi allroad Prestige
2015 Audi Q5 Hybrid Prestige
2015 Audi Q5 Premium
2015 Audi Q5 Premium Plus
2016 Audi A4 Premium
2016 Audi A4 Premium Plus
2016 Audi A4 Quattro Premium
2016 Audi A4 Quattro Premium Plus
2016 Audi A5 Quattro Premium
2016 Audi A5 Quattro Premium Plus
2016 Audi allroad Premium
2016 Audi allroad Premium Plus
2016 Audi Q5 Hybrid Prestige
2016 Audi Q5 Premium
2016 Audi Q5 Premium Plus
2017 Audi A5 Quattro Sport
2017 Audi Q5 Premium
2017 Audi Q5 Premium Plus
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
