BMW X3 M40i Air Filter - Dinan - High Flow Drop-in Replacement - 2018–2019. A direct-fit filter that improves airflow to your X3 M40i while maintaining excellent filtration.

Constructed with four layers of oiled cotton gauze, this Dinan element reduces pressure drop compared to factory paper media, helping the engine breathe easier with consistent response. It is washable and reusable for the life of the vehicle, limiting recurring maintenance costs. Designed to fit the stock air box (G01 X3 M40i, 2018–2019), installation is quick. General D401-0043 dimensions: 270mm x 218mm (10.63" x 8.58"). OE cross-reference: 13718577170, 13718691835, 13718621473, 13718577171, 13718454387, 13712454387. Please confirm part numbers to ensure proper fit.

Features

• High-flow, 4-layer oiled cotton gauze media
• Less restrictive than stock for reduced pressure drop
• Washable/reusable; direct drop-in for the stock air box
• Quick, straightforward installation
• General D401-0043 size: 270mm x 218mm

Have questions or want fitment guidance? Call our team—we also offer installation and customization at our Austin, TX and Los Angeles, CA area facilities. Texas: 512-982-9393. California: 562-981-6800.

If you are considering multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov