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Upgrade your Audi A4's performance with the K&N Engineering 15-18 Audi A4 High-Flow Reusable Drop-In Air Filter. Designed with a layered, oiled cotton media, this filter enhances airflow while effectively capturing contaminants, resulting in improved engine efficiency and increased horsepower. Its high-flow design ensures your engine breathes better, providing a noticeable boost in power and throttle response. Crafted for easy installation, this filter fits seamlessly into your factory air box, making it a straightforward upgrade for your vehicle. The durable construction ensures it lasts for the entire lifespan of your car, backed by K&N's 10-Year/Million Mile Limited Warranty, offering peace of mind and reliable performance over time. Investing in this performance air filter means enjoying superior airflow, maximum engine protection, and long-term savings by avoiding frequent replacements. Whether you're seeking enhanced horsepower or improved engine longevity, this K&N drop-in filter is an ideal choice for your Audi A4. Maintain optimal engine performance with a product engineered for longevity, efficiency, and ease of use, making it a popular upgrade among automotive enthusiasts and daily drivers alike.
Features:
Fitment:
2015 Audi A4 Premium
2015 Audi A4 Premium Plus
2015 Audi A4 Prestige
2016 Audi A4 Premium
2016 Audi A4 Premium Plus
2017 Audi A4 Premium
2017 Audi A4 Premium Plus
2017 Audi A4 Prestige
2018 Audi A4 Premium
2018 Audi A4 Premium Plus
2018 Audi A4 Prestige
2019 Audi A4 Premium
2019 Audi A4 Premium Plus
2019 Audi A4 Prestige
2019 Audi A4 Titanium
2020 Audi A4 Premium
2020 Audi A4 Premium Plus
2020 Audi A4 Prestige
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).
