1999 BMW 528I User Comment / Complaint

My asc and abs warning lights came on, lost speedometer. took to bmw mechanic who read codes and it read rear wheel speed sensor. replaced sensor and speedometer did not work. continued with mechanic on looking for solution and he concluded after talking to other bmw mechanics and going over the symptoms that it is the abs controller that failed. so i have no abs or traction control of speedometer until i can fix this. major safety issue.