I have a 2009 BMW 325I 40km mileage. Regularly maintained at PML and trouble free before I replaced the 4 tyres.
2 days after I changed the 4 tyres at PML service center, four warning lights were suddenly on including ABS,and Brake. PML technician told me that was DSC malfunction warning. One of rear speed sensor were diagnosed faulty and 2 rear sensors were replaced as a result.
Couple weeks later the DSC warning lights were on again. This time 2 front speed sensors were faulty. After fruitless dispute I paid for changing the 2 front sensors with reservation. So far I had spent $900 for 4 new speed sensors in 2 weeks.
Two months later less than 3,000KM driven from replacing 4 new sensors, the DSC warning lights inevitably returned. This time PML informed me the hydraulic unit needs to be changed. The bill size would be $3000-4000.
Can anybody help me understand the possibility that the 4 independently working sensors together with the hydraulic unit all fail almost at same time? Is there a possibility that replacing tyres can cause the DSC problem? Where can I seek alternative service for BMW?