When I took my 05 4.4 to the friend at the dealership for EGS update, I was told that on 04-06 cars with N62 / ZF6HP-26 cars, you can’t update EGS separately from DME. Therefore, after the update, I got both DME and EGS on the latest version. Took about 35 minutes for update program to complete.

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2012 X5 x35i My new toy
2005 X5 4.4 Her's (Retrofitted Servotronic Steering Rack)
2003 X5 3.0 Mine (Retrofitted Servotronic Steering Rack and Heated Steering Wheel)
2001 M5 Son's car
2000 540i 6sp Sports pkg, supercharged. Son's car (Sold)
2001 530i (Sold)
1999 528i (Sold)
1975 2002 (Sold)