How to Replace the Battery in a New BMW 3 Series Key?
2 Answers
Method for replacing the battery in a new BMW 3 Series key: Insert a small blade into the gap on the side of the key, then use a flathead screwdriver to pry along the gap to separate the entire outer shell of the BMW key. Once the shell is separated, remove the circuit board to access the key's battery. Replace it with a new battery, then reinstall the circuit board into the key shell. Apply a small amount of 502 glue along the edges of the shell and press the two halves together to complete the process. The dimensions of the new BMW 3 Series are 4719mm in length, 1827mm in width, and 1459mm in height, with a wheelbase of 2851mm. For the front fascia, the grille area of the new BMW 3 Series has been enlarged and integrated with the headlights on both sides, while the hood features a concave line on each side.
I recently replaced the key battery for my new BMW 3 Series, and the process was straightforward. There's a small groove on the back of the key—just gently pry it open with a small flat-head screwdriver to reveal the battery compartment. The battery is a CR2032 coin cell, which you can easily find at any regular supermarket for about a dollar. Before replacing, make sure to note the orientation of the old battery's positive and negative terminals. Carefully remove the old battery and insert the new one, ensuring the polarity aligns correctly to avoid reversing it. After replacement, press the cover firmly into place and test the unlock and lock functions to confirm they work properly. I recommend replacing the battery every two years to avoid any travel disruptions. Key maintenance is crucial—if neglected, weak signals might affect starting the car. Doing it yourself saves both money and hassle, cutting out the 100-yuan or so cost of a dealership visit. Choose a dry environment for the task to prevent short circuits in damp conditions. After the swap, the key felt more responsive—definitely worth a try.
