BMW 128i third trunk light malfunction with frequent replacements needed on BMW 128i

Some BMW 128i owners report experiencing frequent malfunctions with the third trunk light, which often necessitates replacements. These issues may arise from using generic replacement bulbs that do not match the impedance specifications required by the car's Light Control Module (LCM), potentially leading to error registrations by the On-Board Diagnostics (OBD) system. Additionally, wiring problems, such as broken wires at the trunk hinge, can cause the light to malfunction, trigger warning lights, or engage unexpectedly. To mitigate these problems, some owners find that opting for high-quality OEM or specifically designed aftermarket parts can enhance the longevity and functionality of the light assembly. It is recommended that owners address these factors promptly, including using genuine BMW bulbs and checking for wiring issues, to maintain the proper operation of the third trunk light.