Skip to content

K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter

Marsoni M251S
Sale price$68.99
Pay 4 payments of $17.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
K&N 01-09 Audi A4/RS4/S4 Drop In Air FilterSKU: 33 2209 UPC: 024844085580 K&N 33 2209 Replacement Air Filter: 2002 2009 Audi A4 RS4 S4 Drop In The K&N 33 2209 is a washable reusable high flow air filter with layered oiled cotton media for more airflow and better contaminant capture. It serves as a direct drop in replacement for factory air filters in 2002 2009 Audi A4 S4 RS4 models. Gain horsepower and acceleration while protecting your engine for the vehicle's life. Key Features 4 Layers of
Easy Shipping

Quick Dispatch:

Your K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter ships.

Need Help?
Questions about K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter in your area.

Get Shipping Estimates

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 1905 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
Mrs.Gomez
Bozeman, US
★★★★★ 5
Bathroom accessories
Color: Black
Got the Moss & Stone 6-Piece Bathroom Accessories set and it’s seriously understated elegance. The design is clean and minimalist, which matches my bathroom perfectly. Installation was a breeze and everything feels sturdy. The soap dish and toothbrush holder are especially handy and keep things tidy. Overall, it’s a simple upgrade that makes the space feel more cohesive and polished.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
K
Verified Purchase
Kiara
Omaha, US
★★★★★ 5
This is a nice product to have one stop shop
Color: Black
This key is very convenient and nice. The quality of everything is perfect. I just do not like how the topping for the soap dispenser does not stay.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
A
Verified Purchase
Audrey Furby
Lowell, US
★★★★★ 5
Durable and cost effective
Color: Blue
Go deal for college resident hall..plastic!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
F
Verified Purchase
Fiona Johnson
Boise, US
★★★★★ 4
Really nice
Color: Black
Bin is small but apart from that great product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
P
Verified Purchase
Patrice
Lexington, US
★★★★★ 5
Simple and chic
Color: Black
This fit very well in my guest bathroom so I ended up purchasing it in another color for my personal bath as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025

recommand products