Car keys require a car decoder, a car key machine, usually a CNC key machine, and a car key milling cutter.

If you go to a 4S store with the key and it is my car, then just bring your ID card and driver's license to prove that the car is yours; if it is not your car, you also need a vehicle The owner's power of attorney signature, ID photo, and driving license; if it belongs to a company, just show the company certificate and vehicle certificate.

When the car owner finds the lost car key, he should go to the 4S store to get the key as soon as possible, erase the key data originally memorized by the on-board computer, and then re-equip the key through online diagnosis. However, 4S stores charge according to the number of matches, and each time key data is matched, a matching fee is charged.

After this process, the previously lost key will become invalid and the vehicle cannot be started, but the mechanical lock of the door can still be opened, which still poses a certain risk. So the most reliable way is to replace the entire vehicle lock.

Therefore, in addition to clearing the original key data in the 4S store, car owners should also call the insurance company to register and understand the relevant compensation rules for stolen vehicles to prevent the lack of evidence for claims settlement after the vehicle is stolen. However, getting a new key is not covered by the insurance company, and the car owner has to pay for it out of his own pocket.

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