How to Troubleshoot the BMW Trunk Lock

1. Open the trunk from the inside of the car. Press the 'Trunk' button located to the left of the steering wheel.
2. Check your distance when using the key remote. The 'Trunk' button on the key remote only works from a distance of 3 to 25 feet. Stand closer or farther away if your trunk button doesn't work.
3. Check for objects blocking the trunk. Ice and dirt can clog the opening of the trunk. Remove and/or clean objects from the trunk to open.
4. Change the battery in the remote. Take the integrated key out of the remote. Insert a flathead screwdriver under the battery cover to pop it off. Remove the old battery. Replace with a new battery. The battery model number can be found on the surface. Place the new battery in the remote and snap the cover back on.
5. Take your vehicle to an authorized BMW auto mechanic. The lock mechanism may be broken in your trunk. A trailed professional can properly diagnose and fix such a problem.