VW Eos Brake Light Switch Issue Causing Multiple Errors

I experienced similar electrical issues with my 2010 VW Golf GTI. The brake light failure warnings started appearing out of nowhere, causing multiple system errors across the dashboard and infotainment unit. Initially thought it was just a tail light bulb, but the problem was more complex. The actual issue was a combination of a failing brake light switch and corroded wiring harness near the brake pedal assembly. These electrical issues can trigger multiple error codes since the brake system is connected to various safety and operational modules. While the brake light switch is a common failure point, the multiple system errors suggest checking the entire circuit. In my case, the wiring harness needed replacement due to moisture damage that had spread through the connection points. This is not a typical DIY job unless you have experience with automotive electrical systems and proper diagnostic tools. The repair requires accessing tight spaces behind the brake pedal and possibly removing several interior panels to trace the wiring. The issue is serious from a safety standpoint, as intermittent brake light operation affects how following drivers react to your braking. Also, faulty signals from the brake light switch can interfere with other systems like cruise control and stability control. Recommend having this diagnosed at a certified shop that specializes in European cars, particularly VW electrical systems.

Thanks for sharing your experience with the GTI brake light issue. Really helpful to know about the wiring harness problem, definitely sounds similar to what I am experiencing with my brake pedal switch. The multiple electrical issues and warning lights match exactly what I am seeing. Would you mind sharing what the total repair cost was in your case? Also curious if you have had any recurring electrical issues since the brake light switch and harness were replaced?

Actually the issue with my Golf GTI turned out to be much simpler than initially expected. After visiting a certified VW specialist, they discovered it was just a bad brake light switch, no wiring harness problems after all. The warning lights and system errors were all triggered by this single faulty component. Great news is this was fixed at no cost (0€) since it was just the brake light switch being slightly out of position, a simple adjustment resolved all the electrical issues. Sometimes these switches can get misaligned through normal use. Since the repair, the brake pedal and all related systems have worked perfectly. No more warning lights or electrical issues in the vehicle safety systems. The tail light and brake light warnings completely disappeared, and all dashboard errors cleared up immediately after the adjustment. This experience really shows how a minor brake system issue can trigger multiple warnings, but doesnt always mean an expensive repair is needed. Definitely worth having a professional check it out since vehicle safety is involved.

Just wanted to update everyone on my Eos brake light situation. Finally got it checked out at a different shop that specializes in VW electrical issues. Turns out it was exactly what I suspected, just a faulty brake switch causing all those system errors. Total repair cost was 180€ including diagnostics. The automotive switch replacement took less than an hour. All the electrical issues cleared up right after, no more warning lights on the dash or infotainment system. Such a relief it wasnt something more serious with the tail light wiring. Way better experience than my last mechanic who wanted to replace the entire brake system computer. Really glad I asked here first and found a specialist who knew what they were doing. The car runs perfectly now and all safety systems are back to normal. Thanks again for the advice. Sometimes the simplest solution really is the right one.