BMW 328i brake light malfunction with persistent error code despite bulb replacement on BMW 328i

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some BMW 328i owners report experiencing persistent brake light malfunction issues, even after replacing the bulbs, which may be attributed to several factors. These include connector problems, such as burned positive terminals or poor grounding, which can disrupt the brake light system. Additionally, faulty sensors, incorrect sensor installation, or Electronic Control Unit (ECU) issues may lead to warning light malfunctions. Some owners also encounter software glitches that trigger persistent warning lights despite bulb replacements. Wiring concerns, particularly a lack of voltage around 12 volts from the rear electronics module (REM), can further complicate the situation. Lastly, loose bulbs in their sockets may cause alerts and system malfunctions. It is advisable for owners to inspect these components thoroughly and consult a professional mechanic or BMW service center if the issue continues.

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