ST XA height- and rebound-adjustable coilover kit for the 2008-2013 BMW 1 Series (E82 coupe, E88 convertible) — 128i, 135i and 135is. Ride height is set via a friction-optimized polyamide composite spring perch with a stainless-steel insert, and rebound damping adjusts across 16 clicks so you can tune from comfort to sport. Each kit is hand-built by KW in Fichtenberg, Germany, preset to factory-recommended dyno-tested settings, and shipped with a damper setup manual. Galvanized zinc-coated steel struts with multi-layer sealing and elastomer dust protection for long-term corrosion resistance.
| Type | Coilover kit (ST XA) |
| Adjustability | Ride height + rebound damping |
| Damping | 16-click manual rebound adjustment |
| Construction | Galvanized zinc-coated steel struts; polyamide composite spring perch with stainless-steel insert |
| Origin | Made in Germany (built by KW) |
| Part Number | 18220039 |
| Warranty | 5-year limited, unlimited mileage |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2013 | BMW | 128i | Base |
| 2008-2013 | BMW | 135i | Base |
| 2013 | BMW | 135is | Base |
Shipping: In-stock orders placed before 4 PM EST ship the same day, with standard, expedited, and overnight options available at checkout. Backordered items ship as soon as our distributor restocks — contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
