A permanently lit ABS light on your F30 usually points to a faulty wheel speed sensor. We’ll guide you through the likely causes, which sensors to check first, and whether you can keep driving safely.
What's going on with your ABS light?
If your BMW 3 Series F30's ABS warning light stays on continuously, the system has detected a problem and has switched itself off as a safety precaution. In my experience, the number one culprit is a faulty wheel speed sensor — a small magnetic pickup that measures how fast each wheel is turning. When one of them fails or gets contaminated with brake dust or metal debris, the ABS computer gets an impossible reading and throws a warning light.
