1. First, pry open the smart key of the vehicle, take down the button panel of the smart key directly, and then remove the circuit board of the smart key.
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2, use the electric soldering iron to remove the chip on the circuit board, and then replace the new chip, weld the new chip, that is, complete the replacement of the smart key chip.
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3, for the smart key replacement chip, need to pay attention to the other resistors and patches on the smart key circuit board, replace the chip inside the smart key, need to be re-matched with the vehicle's built-in computer, if not matched, the new smart key chip can not control the vehicle lock and unlock.
The new Passat key will open the folded key head, use a flat-head screwdriver to pry the slit in the key slot, split the key in two, the left and the key head together with the electronic identification chip, the right is the battery remote control, separate the remote control shell, use a flat-head screwdriver to pry it open.