The Genuine BMW Bumper Antenna Passive Access is a high-quality antenna designed specifically for BMW vehicles. It is a passive antenna, meaning it does not require any power source to function. The antenna is installed on the bumper of the vehicle and allows for passive access to the car's locking and unlocking system. This feature enables the driver to lock and unlock the car without having to physically use the key or remote. The antenna is a genuine BMW product, ensuring compatibility and reliability. It is part number 61356912758.