Dead Electronic Brake System Needs Pro Diagnosis

Having some experience with brake system repairs, I dealt with a very similar brake fault on my 04 Park Avenue last year. The symptoms match exactly what you described, complete brake control system failure and persistent warning lights. After initial diagnosis showed a system glitch, the workshop discovered the electric motor in the brake caliper had failed. The brake sensor was still functional, but the motor responsible for the electronic handbrake operation was completely dead. This explained why the handbrake function stopped working. The repair took about 4 hours and cost 505 Euro, including parts and labor. Since this is a safety-critical system, I recommend having it checked by a certified mechanic who can properly diagnose and repair the brake failure. Before giving more specific advice, could you share: Current mileage on your vehicle, When the problem first started, Any unusual sounds before the system failed, Whether the regular brake system still works normally, Any recent brake work or maintenance This information would help determine if your issue is identical to what I experienced or if there might be other factors involved.

Mileage is 142747 KM and last service was performed in March, 2 months ago. The brake sensor readings were normal during diagnostics, but the system continues to malfunction. Regular brake function remains unaffected, which points toward an isolated electronic brake control issue rather than a complete brake system failure. No unusual sounds preceded the failure, the system just stopped responding one morning. The brake fault appeared suddenly and has been consistent since then. Before the recent service, all brake components were working as intended. Based on your repair experience, the failed electric motor scenario seems quite plausible. I will have a certified mechanic check the caliper motor and brake switch assembly to confirm if this matches your case.

Thanks for providing those details. Given the symptoms and timing you described, this does sound remarkably similar to the brake control failure I experienced. The mileage on your vehicle is very close to when my electric motor failed (mine was at 145000 KM). The sudden onset without warning signs and the fact that your regular brakes work fine mirrors my situation exactly. The brake diagnostics showing normal sensor readings but persistent system malfunction was also identical in my case. One detail that stands out, my failure also occurred shortly after routine service. While correlation doesnt always mean causation, its worth having the shop check if any brake control components might have been disturbed during the recent work. The electric motor failure in my caliper was confirmed through specific brake diagnostics testing. The repair resolved all symptoms, the warning light disappeared and full brake control functionality was restored. Given the matching circumstances, I strongly suspect youre dealing with the same brake fault. Since youre planning to have a certified mechanic inspect it, ask them to specifically check: Electric motor function in the brake caliper, Brake switch connections and wiring, Control module communication with the brake system Keep us updated on what they find. The similarities to my case suggest youre on the right track with the diagnosis.

Thanks everyone for the detailed responses. After taking it to the shop today, the brake diagnostics confirmed what was suspected, a failed electric motor in the caliper assembly. The parking brake malfunction was indeed caused by this component failure rather than a system glitch or brake switch issue. The repair estimate is similar to what others experienced, around €500 for parts and labor. Given the critical nature of vehicle safety systems, I'm proceeding with the recommended repair using OEM parts. The mechanic mentioned these electronic brake failures are relatively common at this mileage point. Really appreciate all the input, it helped narrow down the problem quickly and confirm the diagnosis was on track. Will update once the repair is complete in case the information helps others with similar brake control system issues.