What Causes Weak Signal in BMW Key?

[McIvan]

BMW key signal weakness can be attributed to the following reasons: Poor key placement: For example, in the trunk, on the car floor, in cup holders, storage compartments, door panel storage boxes, near the rear parcel shelf, or under the front windshield. If this issue occurs, try placing the key in a visible location within the passenger compartment first. Low battery in the key: Remote keys typically use standard coin-cell batteries with a rated operating voltage of around 3.3V. Under normal conditions, the battery life can last up to 2 years. Use of a key case: Using a key case may result in weak or blocked signals. Signal interference: Placing the key near devices such as mobile phones, laptops, or power adapters. Since these radio devices emit wireless signals that can interfere with the smart key, it is advisable to keep the key away from such devices during use. Issues with the antenna in the rear window glass: If the signal cannot be received, check if the antenna signal amplifier is functioning properly and if any window tinting is causing signal blockage.