BMW 325i rough idling issue on BMW 325i

Some BMW 325i owners report experiencing rough idling issues due to various potential causes. These issues may stem from vacuum leaks and blown fuses, which can trigger O2 sensor codes and lead to unstable idling. Additionally, fuel leakage from injectors when the vehicle is not in use can result in misfires that typically resolve once the engine warms up. Owners of models with the n52 engine, such as the 328, may find that a leaking eccentric shaft sensor contributes to rough idling and could potentially cause limp mode. Furthermore, a faulty O2 sensor or other components may exacerbate the rough idling, particularly if there is a strong exhaust smell at idle without visible smoke. It is recommended that affected owners have their vehicles inspected by a qualified mechanic to diagnose and address these underlying issues for improved idling performance.