Have you ever driven your BMW and seen the DSC (Dynamic Stability Control) light blinking but you can’t tell why? DSC is BMW’s state-of-the-art system that helps it control the car’s stability, traction, and brake system. This system uses various parameters to ensure the stability of the vehicle. If the system finds any problem with the traction, it will apply brakes to individual wheels and cut the engine power for you to regain control. Let’s see the main reason the DSC system can fail in a BMW.
Main Causes of DSC Failure
- Wheel Speed Sensor Issues: The wheel speed sensors are necessary for the normal operation of the DSC system. These sensors keep track of the revolutions of each wheel so as to assist the system in determining if any of the wheels are slipping or not. In the case of failure of one or more of these sensors, the DSC system may not be able to measure the wheel speed correctly. Some of the causes of failure of this sensor include; contamination of the sensors by dirt, moisture, or physical damage on the sensors.
- Faulty Steering Angle Sensor: This is another important component that assists the DSC system to work. This sensor detects the position of the steering wheel so as to know the direction in which the driver intends to go. When the sensor fails to function as expected, the DSC system may not be able to translate the steering inputs of the driver properly and this results in the vehicle being unstable. Steering angle sensors can fail because of electrical issues, because the sensor wears out over time, or because it is not properly aligned.
- Hydraulic Unit Failure: The DSC system uses a hydraulic unit to regulate the brake pressure on the wheels when required. This hydraulic unit can degrade with time or it may develop some leaks and the system will not distribute brake pressure. If the hydraulic unit is damaged then the DSC system will not be able to cope with stability in slippery conditions and this may cause hazardous situations on the roads.
- Electrical Problems: Another common problem that leads to DSC failure in BMW cars is electrical faults. Since the DSC system is electronic, it is subject to some common problems such as wiring troubles, bad connections, or even a fuse that has blown. Any problem with the electrical system also affects the DSC.
- ABS Module Failure: The DSC system can be used together with the Anti-lock Braking System (ABS). If the ABS module fails, it can also bring about the failure of the DSC system. ABS failure may be caused by a faulty pump, electrical failure, or a faulty sensor. Because both systems incorporate some of the same parts, any issue with the ABS will automatically cause the DSC warning lights to come on and decrease the stability of your BMW.
- Low Brake Fluid: You might think this is not a big deal but when it comes to the DSC system, low brake fluid levels can be a problem. Brake fluid is crucial for the provision of the hydraulic pressure necessary for the actuation of the brakes in case of slipping. In case of low brake fluid, the DSC system will not function optimally or not function at all.
- Worn or Damaged Tires: Tires are important for the stability and the grip of the car on the road. If your tires are worn out, under-inflated, or if you have mismatched tires then the DSC system may fail to work as required especially during slippery or uneven terrains. This does not necessarily indicate that the DSC system has failed but worn-out tires put pressure on the system and it tries to work harder to control and may lead to DSC warning.
Where Should You Go With Your BMW To Address DSC Failure in Escondido
If you see any of the signs explained above, you 
should take your BMW to a mechanic for a check-up. Here at Escondido German Auto, we are focused on fixing BMW cars, including those that have problems with the DSC system. Our team of experienced technicians can diagnose the specific problem with your car and make the required repairs to have it working again. We are located in Escondido, CA and we render quality service to drivers from nearby including places like Rancho Bernardo, and Valley Center, CA. Call us now to book an appointment.