BMW 645Ci transmission issues with hard downshifts, stuck in second gear, and transmission fail light on BMW 645Ci

Some BMW 645Ci owners report experiencing transmission issues, including harsh or erratic shifting that may indicate a need for transmission service. Additionally, some drivers have encountered problems with the transmission getting stuck in second gear, which can complicate driving and necessitate mechanical attention. Furthermore, the appearance of the transmission fail light serves as a warning sign of potentially serious transmission problems that require immediate resolution to prevent further damage or safety concerns. It is crucial for BMW 645Ci owners to be vigilant about these issues to maintain the vehicle's longevity and performance.