1. Check the wheel speed sensors: inspect the wheel speed sensors for any damage or debris that may be causing the sensors not to function properly. If there is any damage, replace the affected sensor.
2. Check the brake fluid level: make sure the brake fluid level is full and at the recommended level. If the brake fluid is low, it can cause the ABS system to malfunction.
3. Inspect the ABS module: if the ABS module is faulty or damaged, it will cause the ABS and DSC lights to come on. You will need to have the ABS module diagnosed by a qualified mechanic to determine if it needs to be repaired or replaced.
4. Check the battery voltage: a low battery voltage can also cause the ABS and DSC lights to come on. Make sure the battery is fully charged and the charging system is functioning properly.
5. Scan for fault codes: use a diagnostic tool to scan the vehicle's computer system for any stored fault codes that may be related to the ABS and DSC system. This can help identify the root cause of the problem.
6. Update software: if there are any software updates available for the vehicle, it may be worth installing them as they can sometimes fix various bugs and issues, including those related to the ABS and DSC system.
If you have tried these steps and the issue persists, it is recommended to take your vehicle to a qualified BMW mechanic or dealership for further diagnosis and repair.
