What is the reason for Audi's flashing brake failure warning?

[OAlexandra]

Audi's flashing brake failure warning is caused by excessive brake pedal travel. Excessive brake pedal travel in Audi: Excessive brake pedal travel results in delayed brake response, significantly reduced or even complete loss of braking effectiveness, and increased stopping distance. Solutions for excessive brake pedal travel: 1. If the pedal gradually rises and feels spongy when pumping the brakes repeatedly, but remains low after a brief pause, this indicates air in the brake system. The brake system should be bled in this case. 2. If the brake pedal feels firm with normal resistance but braking performance remains poor, this suggests wheel brake assembly issues such as: oil contamination on brake pads, poor pad contact, worn friction materials, or uneven brake drum wear. A thorough inspection of the braking system should be conducted, with necessary adjustments or repairs performed.

[OJulia]

I've repaired quite a few Audi vehicles, and brake fault warnings are quite common. The main reasons include: brake pads wearing down to nearly the limit, where the thickness falls below the threshold, triggering a direct sensor warning; ABS sensors getting dirty or damaged, most commonly due to mud or water splashing during rainy, snowy, or dirty road conditions, leading to false alarms; insufficient or degraded brake fluid affecting hydraulic pressure, prompting system alerts; hydraulic line leaks, which are more serious issues—once fluid leaks, braking force diminishes; and occasionally, the electronic control unit acting up due to software glitches or hardware short circuits. I've noticed Audi's electronic brake system is quite sensitive—it can flag minor issues, but they should never be ignored. I recommend immediately stopping to check brake fluid levels and brake pads. If everything seems normal, head to a professional 4S shop for diagnostics. For routine maintenance, remember to inspect the brakes every 20,000 kilometers and replace the brake fluid once—this can save a lot of trouble and safety risks.

[DeFinn]

Last time I was driving my Audi Q5 on the highway, a sudden brake failure warning popped up, which really scared me. Possible causes could be worn-out brake pads, moisture in the sensors causing false alarms, low brake fluid, or leaks in the hydraulic system. I pulled over, checked the fluid level—it seemed normal—and when I got to the repair shop, it turned out the ABS sensor was just dirty. After cleaning it, everything was fine. The mechanic said this happens especially often in rainy weather, and Audi's brake system monitoring is very strict, triggering warnings at the slightest irregularity. That experience taught me a lesson: now I make it a habit to check the brake fluid color and level every time I refuel, so I don’t panic when a warning appears. In winter, I pay extra attention to protecting the sensors. Remember, warnings are signals—address them as soon as possible. Delaying can harm the entire braking system and even lead to accidents.

[AubreyLee]

Braking system malfunctions in Audi vehicles often trigger warnings due to ABS sensor failures, such as dust accumulation or water ingress interfering with readings; excessively worn brake pads or uneven rotor surfaces; hydraulic system leaks or air entering the lines reducing efficiency; as well as deteriorated or low brake fluid levels. Audi's electronic monitoring system is highly intelligent, alerting drivers to minor anomalies—don't dismiss these as false alarms. Key maintenance practices include: visually inspecting the braking system before and after long trips, using professional fluid level gauges for monitoring, and maintaining cleanliness.