Have Questions?
Professional-grade parts used trackside.
Expert help during business hours.
Encrypted checkout & trusted payments.
Orders ship quickly from regional warehouses.
Upgrade your BMW X5 M with the K&N Engineering High-Flow Replacement Air Filter, part number knn33-5144. Crafted with layered, oiled cotton media, this filter is engineered to significantly improve airflow, resulting in enhanced engine performance. Its advanced design not only helps boost horsepower but also ensures your engine receives cleaner air for optimal operation. K&N's reusable filter is built to last the entire lifespan of your vehicle, providing long-term value and consistent performance. Installing is straightforward, as it is designed to drop directly into your factory air box, making it an easy upgrade for any vehicle enthusiast. Backed by K&N's No-Hassle Lifetime Limited Warranty, this filter offers peace of mind along with superior airflow benefits. Whether you're looking for increased power or better engine protection, this high-flow filter is a practical choice for your BMW X5 M. It is compliant with Prop 65 requirements and does not require special handling or certification for use in your vehicle. Enhance your driving experience today with the proven quality of K&N's high-performance air filters, a trusted name in automotive filtration.
Features:
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).
