Do you have a RC or 2018 X3? When I did my upgrade to the 2019 power steering unit they had to flash my ECU to use the new unit. I believe they put in the software for an RC for the power steering unit.I have the BUDS software so I added the upgraded power steering unit without changing anything on the ECU. I have put about 500 miles on the new steering unit without updating the software and it performs so much better than the low torque unit . So anyone who wants to do this upgrade it will work without going to the dealer.