I hope someone can correct me if I'm wrong but isn't it possible just to do the lock to lock turns with the steering wheel to calibrate the SAS?

BMW X5 4.8iS 2005

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BMW X5 E53, 4.8iS - 2005
Professional Stereo/Nav with DSP (modified BM54 module) - Converted to Eonon GA5166X with Reverse cam
4-Corner Air Suspension - Converted to BC Coilovers