KW Coilover Kit V1 BMW 4 Series F33 435i Convertible, xDrive with EDC

The INOX-LINE stainless steel construction of these KW V1 coilover struts is a key detail, offering true permanent corrosion resistance that won't wear off even when you adjust the ride height. This means you get a suspension system built to last, even in harsh conditions. These coilovers are designed specifically for your 2017-2020 BMW 440i xDrive, providing a balanced and sporty feel tuned by KW's engineers.

KW develops a specific damper setup and spring rate for each vehicle application, drawing on extensive testing at the Nürburgring Nordschleife and their 7-post chassis dynamics test center. This ensures an optimal balance of sportiness and practicality, reducing body roll for more direct handling without sacrificing too much comfort. The ride height is adjustable within an approved range, allowing you to dial in your preferred stance while maintaining proper suspension function and travel. The dirt-resistant trapezoid thread and composite adjustment collar make height adjustments easy, even after years of use.

This kit includes elastomer bump stops with integrated dust protection to keep dirt and water away from the piston rod and seals, contributing to long-term durability. The composite spring perches combine wear-resistant polyamide with a strong stainless-steel insert, preventing oxidation and maximizing strength. Each coilover is hand-built in Germany, individually serialized, and dyno-tested before shipping, reflecting KW's commitment to quality and performance.