Heya X5Ghost,
Sorry I completely missed that you had updated here and I was wondering about the latest progress!

Yes, confirmed we did scan all modules in the car (via Gt1) and the only persistent errors that remained after clearing the list of way old stored codes were

1: DSC : 5EB1 DSC Steering angle sensor supply
2: 27A4: EWS 3.3 interface engine management immobilizer - no EWS telegram

All else looked clean and clear.


I agree the idea of trying to:
EWS to sync to DME

Was just reading through that pdf you posted here and will plugin to see if I can find those options in software.

Also been seeing that some strange things happens on low battery voltage with these cars so we may want to plugin in a 2nd battery or ultra clean power charger during sync.

Will ping you back or post here with what I see.

J

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2003 E39 530i
1992 MX5
2005 E53 x5 4.8is (sold)
1990 K75S (sold)