Audi Q2 E-Brake Failure: Warning Light Alert

I have some experience with these electronic brake systems, having dealt with a similar parking brake issue on my 2019 Audi Q3. The symptoms you describe match what I encountered, complete brake failure and warning lights indicating a system glitch. My electronic brake also stopped engaging, and the workshop diagnosed a defective electric motor in the brake caliper. The repair involved replacing the entire brake caliper assembly since the electronic motor is integrated. Total cost was 505 Euro for parts and labor. The electronic parking brake systems are quite complex, and when they fail, it usually requires professional diagnostic equipment to pinpoint the exact cause. Mine started with intermittent brake fault warnings before complete failure. To help troubleshoot your specific case, could you share: Does the brake make any sounds when engaging/disengaging? Did you notice any warning signs before complete failure? Are there any other electronic issues with the vehicle? What error code is showing exactly? Since your Q2 is under warranty, definitely have the dealer check it. They can properly diagnose whether its the brake caliper motor or another component of the electronic brake system causing the fault.

Thanks for sharing your Q3 experience. Based on my recent service at 70368 KM, I can confirm the brake diagnostics revealed similar symptoms. In my case, the electronic parking brake failure was traced to a faulty brake switch sensor, not the caliper motor. When engaging, mine made a clicking sound followed by warning lights. The brake control module stored error code P-3421 pointing to a circuit malfunction. No other electronic issues appeared before or after. The warranty covered my repair, but I learned these parking brake systems often need sensor calibration after parts replacement. Would be curious if others had success with third-party repairs or if dealer service is the only reliable fix for these electronic brake faults.

Thanks for that update on your Q2 brake repair. Good to hear warranty covered it. My Q3 situation was actually quite different from what I initially thought, the clicking sound you mentioned was present in mine too, but the brake diagnostics led down a different path. While my initial diagnosis suggested a caliper motor issue, further brake control module testing revealed a wiring harness fault. The connection between the brake switch sensor and control unit had corroded, triggering similar error codes. The repair was less extensive than replacing the entire caliper assembly, costing 220 Euro for the wiring repair and electronic brake system recalibration. After the fix, the dealer performed a complete brake diagnostics scan to ensure no residual codes remained. Regarding third-party repairs, I would be cautious. These electronic parking brake systems need specific diagnostic tools for proper calibration. The brake control module programming is quite sensitive, and incorrect calibration can lead to new faults. Based on both our experiences, these electronic brake issues often stem from electrical components rather than mechanical parts. Regular brake system checks during service intervals might help catch potential failures before they occur.

Thanks for sharing those details about your Q3 wiring harness repair. My Q2 is now fixed and running great after the brake switch sensor replacement. The clicking noise completely disappeared after the repair. Just got the car back yesterday and did a full series of parking brake tests, working perfectly now with no warning lights or error codes. The brake control module shows all clear after the new sensor calibration. Agree completely about sticking with dealer service for these electronic brake system repairs. My independent mechanic actually recommended going to the dealer when I first mentioned the brake fault codes, saying the diagnostic equipment needed was too specialized. For anyone else facing similar vehicle safety issues, my experience suggests getting a proper brake diagnostics scan early rather than waiting for complete system failure. The service department mentioned these brake sensor problems are fairly common but easily fixed if caught during routine maintenance. Would be useful to compile a list of early warning signs for others to watch for with their electronic parking brakes. In my case, the clicking sound and intermittent warning lights were key indicators before the full system glitch occurred.