Triple checking: do you guys have tpms light chronically on? Asking because it happened to me, new air strut constantly deflated and SLS inactive stayed on for almost 3 months. Got solved after overinflated the culprit tire to 50#.
In any case air strut replacement is an easy job. Changed both fronts in the last year. No coding involved

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"better the devil you know than the devil you don't"
2003-03-04 E53 X5 4.4i M62 [SOLD]
2006-03-16 E53 X5 4.8iS N62s
2006-03-28 E90 325i N52 [TOTALED]
2012-09-06 F30 328i N20 (CEO's)