Does BMW 530i key remote have a battery?

Yes, the BMW 530i key remote has a battery. The battery type is usually a CR2032 coin cell battery. It is responsible for powering the remote's electronic features, such as locking and unlocking the doors, activating the panic alarm, and opening the trunk. When the battery is low, the remote may experience reduced range or intermittent functionality. Replacing the battery is typically a simple DIY task that can be done with basic tools and instructions found in the vehicle's owner's manual.