Faulty RS3 Brake Switch Triggers Warning Lights

Had the exact same brake light issue on my 2019 S3. The brake switch malfunction triggered error messages just like yours. After thorough testing at the garage, it turned out the automotive switch behind the brake pedal had worn contacts. This is a known weak point in these models. The vehicle safety system constantly monitors brake light function, which explains the persistent error messages. The repair involved replacing the entire brake switch assembly, not just cleaning the contacts. While not immediately dangerous, its best to address this soon since functional brake lights are essential for safe driving. The faulty switch can also interfere with cruise control and start-stop systems. The fix was straightforward, removing the old switch, installing a new one, and clearing the error codes. No major mechanical work needed, just dealing with the electrical components. The parts are readily available and its a common repair for experienced technicians. Important: Make sure to get the correct brake switch specification for your model, as using incorrect parts can cause more electrical issues.

I had that exact brake light problem in my RS3 last summer. The symptoms match perfectly, error messages and everything. The brake switch replacement fixed it completely. The repair was just like described, straightforward switch swap and code clearing. The automotive switch itself was the culprit, affecting multiple vehicle safety systems. Quick question though, do you remember the total repair cost for your brake system fix? And has the new switch been working reliably since installation? Mine has been solid but curious about long-term durability.

Actually, after bringing my S3 to the mechanic, it turned out no switch replacement was needed at all. The brake pedal switch just needed proper adjustment, it was a simple alignment issue causing those error messages. Since fixing the electrical issue, everything has worked flawlessly. The vehicle safety systems and brake lights are functioning perfectly with zero error messages. This type of automotive switch is quite durable when properly adjusted. Best part was the repair cost nothing since it was just a matter of correcting the switch position. The mechanic showed me how the brake pedal alignment affects the switch contact points. No parts were required, just technical knowledge to diagnose and adjust. If anyone else encounters similar symptoms, worth having a technician check the switch alignment before assuming replacement is needed. Could save unnecessary repair costs.

Thank for sharing. After those persistent brake light warnings, I finally got it checked out at a new shop last week. They diagnosed it as a worn brake switch like you mentioned. The repair was quick, took about an hour for the switch replacement and resetting the error codes. Parts and labor came to 180 Euro total. Way less hassle than my previous mechanic who kept suggesting unrelated fixes. The new brake switch has completely resolved the warning messages. All the vehicle safety features are working normally again, including the cruise control. The shop also showed me how the old switch contacts were badly worn, explaining the intermittent electrical issues. Its been running great for the past week with no brake system warnings. Glad I got it fixed, having reliable brake lights is essential for safe driving.