How to replace the key fob shell in the Hyundai i20.

To replace the shell of the Hyundai i20 remote control, you must first ensure that the new cover is identical to yours: the same shape, the same number and arrangement of buttons, and the same type of battery. Work on a clean and well-lit surface, as there are small components inside the key that, if lost, can prevent the car from starting. Start by separating the two halves of the remote. This is usually done by prying with a small flathead screwdriver or a plastic lever at the joint of the casing: open it slowly, without forcing, to avoid breaking the clips. When the cover opens, gently remove the electronic board (PCB) and, if present, the immobilizer/transponder chip: it may be a small separate component fitted into the shell. This step is crucial, as if the transponder remains in the old shell, the car may not recognize the key. Then transfer all internal elements to the new cover: electronic board, rubber buttons (if not already integrated into the new shell), any supports or seals, and the battery. If the mechanical blade is separate (in some models, it is removable or secured with a pin/screw), move it to the new shell following the same orientation, so there are no gaps or incomplete closures. Before closing, check that the buttons press correctly and that the battery is inserted in the right position. Close the remote by aligning the clips and pressing along the perimeter until you hear the clips close evenly.