G22 | G23 (2020+)

Most owners start with the stance, as lowering springs remove the factory arch gap and make the biggest visual difference. Better brake pads and discs with fresh fluid come next, then interior upgrades such as paddle shifters. On the petrol 420i and 430i, an intake and a software tune are the usual performance path, while 420d owners tend to focus on chassis, brakes and styling.

Yes. Both use the B48 2.0-litre turbo petrol, which typically responds well to a stage 1 map on standard hardware, with an intake and a sports-cat downpipe used for stage 2. Replace older spark plugs before raising boost. Cars built from around mid-2020 have a locked engine computer that needs a specialist bench unlock first, so check this before buying any flash-tuning software.

Yes, provided the kit is developed for adaptive dampers. Spring kits such as those from H&R list whether they suit cars with Adaptive M Suspension, which keeps the drive modes working. Coilovers replace the factory dampers, so kits for adaptive cars include an EDC deactivation module to avoid warning lights. Always have a four-wheel alignment after lowering.

Many mechanical parts are shared, including much of the engine hardware, brake systems and interior controls such as paddle shifters. However, the G22 has its own body panels, lights, mirrors and bumpers, and its suspension tuning and spring rates differ, so styling and suspension parts are usually model-specific. Check each listing's stated fitment rather than assuming a 3 Series part will fit.

Mechanically they are very similar, but the Convertible carries extra weight from its folding roof and body strengthening, so spring rates and lowering kits are often specific to the G23. Rear styling parts also differ because of the roof and boot design. Brakes and engine parts are normally shared. R44 shows exact G22 and G23 fitment on every product, and My Garage filters the range to your car.

In the UK, aftermarket parts do not automatically void the whole BMW warranty, but a claim can be declined for a fault linked to a modification, and software tuning is the most likely to be questioned. Bolt-on styling, brakes and suspension carry less risk. Every modification should be declared to your insurer, as undeclared changes can affect a claim.