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22" Diameter wheels are highly unlikely to be the cause if not impossible by themselves. Tires however are more likely as is the installation event. Significant change in the overall tire diameter, improper TPMS Sensors, improper wheel change procedures, or failure to properly initialize TPMS are likely to trigger suspension faults.
Two Axle Air Suspension isn't anything new to the industry nor to BMW Group. Previous generation Land Rover/Range Rover models developed by BMW, LCI E53 X5, and all Rolls Royce since the Phantom have had it as an option or standard equipment.
G11/12 do add some new functions however and rely heavily on other vehicle systems. TPMS and DSC are the two significant ones. One specific feature comes from the direct interaction with TPMS. If a tire begins to deflate or loses all air pressure, the suspension will compensate to reduce the load on the affected tire. At the same time DSC and EPS will adapt to avoid unsafe handling characteristics. As a backup to or separately from TPMS, individual wheel speed sensors through DSC can trigger alternate or failure operating modes of the suspension system.
There are several wheel change and TPMS procedures that cover one or more scenarios to reduce the chance of a fault, but they do have to be followed accordingly and completely.
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