This keyless entry remote replacement key fob is specifically designed for BMW vehicles, compatible with multiple series including 1, 3, 5 Series, as well as X1, X3, X5, X6, and Z4 models, including the 328i, 325i, and 320. The key fob comes with model number KR55WK49127 and includes a pre-installed fresh battery for immediate use. Before purchase, it's important to verify that your original key blade matches exactly with the one shown in the product image. Please note that this replacement key requires professional cutting and programming, which can be done through a local locksmith or by yourself if you have the necessary expertise. This key fob serves as a direct replacement for your original BMW remote key.