Trifecta question

[Black-Forest]

I have searched the threads but have yet to come across a reasonable solution to my DSC issue in our recently purchased 00' X5 4.4.These lights were on when we bought the vehicle. I've scanned the ABS system and found.

- Front right wheel speed sensor open circuit
- Front left wheel speed sensor open circuit

The above are hard codes and won't clear. I have replaced the offending front sensors with no success. I also get

- Steering angle sensor open circuit

This code resets with my Snap on Solus scanner but will come back when re-scanned a few days later. I also feel the Left rear sensor has an issue as intermittently I will loose the speedo. When the speedo goes out the brake warning light goes from amber to red. Speedo resets when the car is restarted. It seems odd to have so many "open circuit" codes. Charge rate average is 13.6V and does bounce around a bit but not below 13.2V and battery is new. I have a feeling it maybe time to replace the DSC module but thought I would check in with those who have experience this system. Any direction would be greatly appreciated.