ST Suspensions XA adjustable coilover kit for the 2009-2016 BMW Z4 (E89), offering both ride-height and 16-click rebound damping adjustment. Built by hand by KW in Fichtenberg, Germany, with galvanized zinc-coated steel struts, a friction-optimized polyamide composite spring perch with stainless-steel insert, and a dust-protection sealing package on a hardened chrome piston rod. Each kit is dyno-tested and ships with a damper setup manual; backed by a 5-year unlimited-mileage limited warranty.
| Type | Adjustable coilover kit (ST XA) |
| Adjustability | Ride height + damping |
| Damping | 16-click manual rebound adjustment |
| Construction | Galvanized zinc-coated steel struts; polyamide composite spring perch with stainless-steel insert |
| Warranty | 5-year limited, unlimited mileage |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2009-2011 | BMW | Z4 | sDrive30i |
| 2009-2016 | BMW | Z4 | sDrive35i |
| 2011-2016 | BMW | Z4 | sDrive35is |
