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BMW DSC, ABS and brake system warnings
Yellow: stability or anti-lock help is off, drive carefully. Red: braking itself may be affected, stop.
Last updated
At a glance
| Can I keep driving? | Yellow DSC/ABS: carefully. Red brake fluid/brake system: stop |
|---|---|
| Warning color | Yellow for DSC/ABS; red for brake fluid or brake system |
| Wording you may see | DSC failed! Drive carefully Control systems! Drive carefully (brake and driving control systems) Brake fluid! Stop carefully Brake system. Drive at moderate speed ABS/DSC lights on together |
| Usual causes | Wheel speed sensor or its wiring DSC hydraulic unit or control unit Integrated brake system (newer cars) Low brake fluid |
What it means
Dynamic Stability Control (DSC) includes ABS, traction control and brake assist. BMW's E90 wording for a DSC fault is "DSC failed! Restricted driving stability when accelerating and cornering. Drive carefully." A combined fault reads "Control systems! Brake and driving control systems failure. Reduced braking and driving stability. Avoid braking abruptly if possible." Low brake fluid gives "Brake fluid! Insufficient brake fluid. Braking effect reduced. Stop carefully."
Can I keep driving?
Yellow DSC/ABS: carefully. Red brake fluid/brake system: stop. With a yellow DSC or ABS warning the normal brakes still work, but wheels can lock or spin, so brake earlier and gently. A red brake warning or low brake fluid message means braking may be reduced: stop carefully and get help.
This is general guidance. Your owner's manual has the exact instruction for your car, and any red warning means stop as soon as it is safe.
Usual causes
| Cause | Cars most affected | What you notice | BMW bulletins |
|---|---|---|---|
| Wheel speed sensor or its wiring | All; F25 X3/F26 X4 to 7/2016 and M5/M6 have bulletins | DSC and ABS lights together, often after rain, a bump or brake work. | SI B61 21 15 (PDF) SI B34 09 14 (PDF) |
| DSC hydraulic unit or control unit | G05, G06, G07, F95, F96 (service action); G22, G23, G26 (delivery stop) | BMW has replaced DSC hydraulic units under service actions; check your VIN for open campaigns. | SI B34 07 20 (PDF) SI B34 02 26 (PDF) |
| Integrated brake system (newer cars) | G05 LCI, G06 LCI, G07 LCI, G60, G70, U10, U11 and others | "Brake system. Drive at moderate speed" with fault 480B18; BMW replaces the brake module. | SI B34 10 25 (PDF) |
| Low brake fluid | All | Usually worn pads (the level drops as pads wear) or a leak. Have it checked; don't just top up. | — |
Bulletins are BMW service information filed with NHTSA; open one for the exact models, build dates and repair. A bulletin isn't a recall and doesn't mean your car has the problem.
What to do
- If the red brake warning is on, don't keep driving; check whether the parking brake is fully released first.
- Have DSC fault memory read; it names which wheel sensor or unit has the fault.
- Check for open recalls and service actions on your VIN before paying for a DSC unit.
Other BMW bulletins that mention it
- SI B34 09 25 Service action: replace the brake fluid expansion tank G20, G22, G23, G26, G80 and others · Dec 2025
- SI B34 02 25 Delivery stop: brake fluid expansion tank G20, G22, G23, G26, G42 · Apr 2025
- SI B34 04 16 Driving stabilization control failure: ABS/DSC instrument lamps lit F48 · Aug 2016
- SI B62 10 19 Incorrect condition based service data for brake fluid service G01, G02, G05, G06, G07 and others · Dec 2019
- SI B34 06 16 DSC “wheel speed sensor” fault codes and malfunction indicator lamp- diagnostic G11, G12, E90, E92, E93 and others · Aug 2016
- SI B34 10 13 Wheel Speed Sensor Failure F25 · Feb 2014
- SI B34 02 25 Delivery stop: brake fluid expansion tank G20, G22, G23, G26, G42 · Mar 2025
- SI B34 04 17 DSC warning lamp illuminated after transport mode deactivation G11, G12, G30, G31, E60 and others · Apr 2017
42 of the BMW bulletins we hold mention this warning in their text; these are the closest matches.
Related warnings
Chassis stabilization Brake pad wear warning Tire pressure (TPMS) All warning lights
Sources
- BMW E90 Driver Information Systems (BMW technical training manual): Check Control message list
- BMW USA: digital owner's manual for your VIN
- NHTSA: BMW technical service bulletins and recalls by VIN
Message wording in quotes is BMW's own, from the Check Control list in BMW's E90 training manual or from the bulletins linked above; newer cars word some messages differently. The explanations are ours.