2006 E66 DCS/ABS/Servomatic/ faults

When I start my car there is no fault lights, i will begin to drive for about 10miles or so and the abs fault light appears, followed by the servomatic malfunction, and DCS inactivated. I had the car service codes read which read as a abs/speed sensor, so i replaced both front sensors $200 dollars later no change. I had the battery checked from autozone at 700cca,750cca, 850cca load and battery stayed at 80% under load. I had the alternator checked from a shop and they said its working fine. couple of things left to check, the steering wheel angle sensor, and the DCS module. So I would appreciate any input in to finding the problem and how to test them to check if its functioning, the shop i went to just feels like they will just have me replace everything until the problem is fixed regardless if its working or not.

I recommend to hook up with ISTA and have any faults that come up in test shedule review by a BMW technician. Ch

Sent from my Nexus 7 using Bimmer App

Ch

Sent from my Nexus 7 using Bimmer App

Check alternator with a DSO during start up,high load and ch

Sent from my Nexus 7 using Bimmer App

Also look for any loose battery connections

Sent from my Nexus 7 using Bimmer App