KW H.A.S. Height Adjustable Spring Kit – BMW 840i / M850i xDrive Gran Coupe (G16)

OVERVIEW

H.A.S. stands for Height Adjustable Spring kit. It is springs only: the factory dampers stay in the car, and each spring perch is adjustable so you can set the drop precisely instead of accepting whatever a fixed lowering spring gives you.

The reason it exists is the electronics. On an adaptive-damper car, replacing the dampers means dealing with the EDC circuit — either a bundled coilover kit with cancellation modules, or fault codes. H.A.S. sidesteps that entirely. Because the OE dampers and their sensors are untouched, no ESC or EDC cancellation module is required and the car sets no damper faults. Drive-mode damper control keeps working exactly as it did.

This is the kit for an owner who wants the stance and the reduced center of gravity without giving up the factory adaptive damping or its warranty story.

SPECS

• Height adjustable springs only — the factory adaptive dampers are retained
• Continuously height adjustable
• No EDC / ESC cancellation module required; no damper fault codes are set

PARTS INCLUDED

• Front and rear KW height adjustable springs with adjustable perches
• Mounting hardware and KW's fitting instructions

TECH RESOURCES

Additional Parts Required

• Nothing electronic is required. The OE dampers are retained, so no KW ESC or EDC cancellation module is needed.
• A corner-balance and a full four-wheel alignment are required after installation. Budget for both before the car is driven.

Installation

• Installation instructions: PDF.
• In brief: the struts come out, the OE springs are swapped for the KW adjustable springs on the OE dampers, the perches are set to the target ride height, and the car is corner-balanced and aligned. The damper wiring is never disturbed.

Notes

• KW's own fitment chart lists part number 253200EA for the BMW M850i xDrive Gran Coupe (G16) only — 840i xDrive Gran Coupe is not a listed fitment for this part number. The 840i row has been removed pending a confirmed KW part number for that model. Confirmed directly against KW's fitment chart on 2026-09-02.
• Price is for the item selected only; labor is not included.

PART NUMBER

• 253200EA — H.A.S. height adjustable spring kit, BMW 840i / M850i xDrive Gran Coupe G16

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