The Genuine BMW Lock Speaker - 51427393503 is a replacement speaker designed for use in BMW vehicles. It is a genuine BMW part, meaning it is made by the original manufacturer and is of high quality. This lock speaker is used in the locking mechanism of the vehicle's doors, providing an audible signal when the doors are locked or unlocked. It is an essential component for ensuring the proper functioning of the vehicle's locking system. This lock speaker is specifically designed for BMW models and is made to the same specifications as the original part, ensuring a perfect fit and reliable performance.