
BMW 3 Series GT key disassembly method: Gently insert a small blade into the position of the key's ear to create a slight gap. Then, use a flat-head screwdriver to start along the ear, which allows you to separate the entire outer shell of the BMW key. The key's battery is visibly exposed, along with the circuit board's reverse-side pins. After that, reinstall the circuit board back into the key shell, apply a small amount of 502 glue along the edges of the shell, and press the two shell pieces together to complete the process. The BMW 3 Series GT is a crossover mid-size car under the BMW brand, based on the 3 Series. The car measures 4824 mm in length, 1828 mm in width, and 1518 mm in height, with a wheelbase of 2920 mm. This model is a five-door, five-seat hatchback, featuring the same suspension structure and powertrain as the BMW 3 Series.

Disassembling a BMW 3 Series GT key is actually quite simple, I do it often myself. There's a thin gap on the side of the key - just insert your fingernail or a plastic pry tool and gently pry it open. Avoid using metal tools as they can scratch the surface. After separating the two halves, you'll see the button battery, usually a CR2032 model. When replacing the battery, pay attention to the polarity - don't install it backwards. The side marked with a plus sign in the battery compartment should face upwards. Before reassembling, check if any clips are broken. Align the top and bottom shells properly, and you should hear a click when they snap together. Don't use excessive force during the process as the plastic components are fragile. After reassembly, it's best to test the remote functions. If it doesn't respond, there might be contact issues or you may have used the wrong battery type.

The first time I disassembled a BMW key, I was quite nervous, but later found it to be quite safe. On the side with the BMW logo on the back of the key, there are clips. If your fingernails aren't hard enough, you can use a bank card to push in and pry it open. Be careful not to force it open hastily. After separating the shell, the battery is located in the middle of the circuit board. Avoid touching other components to prevent static damage. Use a toothpick to flip open the battery holder to remove the old battery. After replacing it with a new one, press it firmly into place. Important reminder: When reassembling the shell, clip the bottom first before pressing the top, otherwise it may misalign. A friend of mine ended up spending extra money on repairs because they got the order wrong, causing the buttons to malfunction.

Disassembling the key fob is a three-step process: pry, replace, and snap. Use a thin tool to wedge into the seam near the keyring, separating the halves like opening a clam shell. Remove the battery with plastic tweezers or your nail—avoid touching the circular circuit components. I recommend cleaning the electrode contacts to remove oxidation for better battery life. Always wear anti-static gloves; the components are more delicate than they appear. When testing the lock button afterward, stand at least five paces from the vehicle for accurate range verification.


