2015 BMW 550XI getting our big power tune using OBD2 only and our shippable end-user cable to anywhere in the world. No more ECU benching to mod the “uncrackable” MED17 BMW ECU. 15 minute single ECU, 30 minute dual ECU. The 550 X drive is particularly fast in AWD form when mapped making near M5 power but putting it to all 4 wheels with it’s close ratio 8 speed.