XYZ Racing Circuit Master Coilovers — BMW 3 SERIES G21 (2WD/4WD) 4/6 CYL (Cancellation Kit for Electronic Damping) 2018-2026

Order a G21 Touring with adaptive M Sport suspension and the factory fits electronically controlled dampers wired straight into the car’s suspension control module. Pull those out for a coilover conversion without addressing that wiring and you’re left with warning lights, a car that thinks its damper actuators have vanished, and a dash full of faults. This Circuit Master kit is built specifically around that problem: it’s the cancellation-kit variant for BM108-C chassis cars, covering both 2WD and 4WD G21s across four- and six-cylinder engine options, so the electronic damping system is properly bypassed rather than left fighting a mechanical setup it can’t talk to.

Circuit Master sits at the sharp end of the XYZ Racing range, built for drivers doing repeat lap sessions rather than a single trackday outing. On a G21 – a chassis that carries more weight over the rear axle than the saloon thanks to the estate body and load floor – that matters when the car is working hard through consecutive laps and heat starts building in the dampers.

What this coilover does for your 2018-2026 Bmw 3 Series G21 (2wd/4wd) 4/6 CYL (Cancellation Kit for Electronic Damping)

With 9720 damping adjustment combinations available through the kit’s three external knobs, you can set the front and rear independently to match how your specific G21 loads up – useful given how differently the 2WD and 4WD variants transfer weight under braking and through direction changes. The extra adjustment range means you’re not compromising between a setting that copes with track kerbs and one that holds the car flat through a fast corner; you pick both. Ride height is fully adjustable too, so the Touring’s factory-tall estate stance can be brought down to something that actually suits circuit use without running out of suspension travel. Because the electronic damping system is properly cancelled rather than just disconnected, the car isn’t fighting phantom fault codes while you’re trying to read what the chassis is doing underneath you.

About the Circuit Master coilover

Circuit Master is XYZ Racing’s dedicated circuit-focused damper, developed and run by XYZ’s own racing teams across a range of international events before making it to retail. The core of the design is the three-knob external adjuster, which routes damping oil through a deliberately small internal passage – the fine control that gives you the 9720-way adjustment range also means you may hear a faint noise from oil moving through that passage when the car crosses a sharp bump. That’s a by-product of the small-hole design doing its job, not a fault, and it’s not something a circuit-focused damper on smooth, purpose-built track surfaces needs to worry about. Construction is aimed squarely at cars that see repeated hard laps rather than occasional fast road use, with the adjustment range built to let racers tune a setup that keeps working session after session rather than needing to be re-dialled every time conditions shift.

Fitment for the BMW 3 Series G21 (2018-2026)

This kit is built for the BM108-C chassis code, covering the G21 Touring from 2018 through to 2026 across both 2WD and 4WD drivetrains and 4-cylinder and 6-cylinder engine options. It is specifically the cancellation-kit version, intended for cars that left the factory with electronic adaptive damping fitted rather than passive suspension. Confirm your G21’s original suspension type before ordering, since a car without factory electronic dampers won’t need this variant.

What buyers also search for

• BMW 3 Series G21 Touring coilover conversion for cars with adaptive M Sport suspension
• BMW G21 electronic damping cancellation kit for aftermarket coilovers
• BMW 3 Series G21 circuit coilover setup for 2WD and 4WD models
• BM108-C chassis suspension upgrade for repeat track sessions
• G21 Touring ride height and damping adjustment for circuit use

Spec your BM108-C Circuit Master kit against your exact G21’s drivetrain and engine below, and configure yours to get the right cancellation-kit fitment for your car.