ST Suspensions XA Coilovers - BMW F3x xDrive 2013-2020

The ST XA adjustable coilover kit gives you control over both ride height and rebound damping for the AWD (xDrive) BMW 335i, 340i, 435i and 440i. Built by hand by KW in Germany, it offers seamless ride-height adjustment via a friction-optimized polyamide composite spring perch with a stainless-steel insert, plus 16 clicks of rebound damping so you can dial in anything from comfort to a sportier setup. Galvanized zinc-coated steel struts, a hardened chrome piston rod, and an elastomer bump stop with integrated dust protection guard against corrosion and contamination for long service life. Each kit ships preset to KW's dyno-tested factory settings and includes a damper setup manual.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy