How to downgrade the key？ How to downgrade and reprogram vehicle keys？

Vehicle key degradation and reprogramming: in-depth analysis and operation guide

In the process of automobile use, it may sometimes be necessary to downgrade and reprogram the vehicle keys. This operation is not arbitrary, but requires specific steps and precautions.

First of all, we need to know under what circumstances it may be necessary to downgrade the key. Common reasons include: the new key is not compatible with the vehicle system, the key function is abnormal or wrong, and the key function is affected after the vehicle system is upgraded.

Before the key is downgraded and reprogrammed, preparation is very important. You need to ensure that you have the legal ownership certificate of the vehicle, the relevant information of the vehicle (such as model, frame number, etc.) and the appropriate programming tools.

The next step is the specific operation steps. Generally speaking, the operation process is roughly as follows:

1. Connect the diagnostic equipment: connect the professional automobile diagnostic equipment with the diagnostic interface of the vehicle.

2. Enter the programming mode: select the key programming mode through the operation interface of the diagnostic equipment.

3. Select the downgrade option: in programming mode, find and select the related options for key downgrade.

4. Input vehicle information: accurately input key information such as vehicle model and frame number to ensure the accuracy of programming.

5. Perform the demotion operation: after confirmation, start the demotion procedure and wait for the operation to be completed.

It should be noted that the key downgrade and reprogramming process of different models may be different. The following is a comparison of key degradation characteristics of some common models:

In addition, in the whole operation process, the vehicle power supply must be kept stable to avoid system failure caused by operation interruption. If you are not familiar with the operation, it is recommended to seek the help of professional automobile maintenance personnel or 4S shop to ensure the safety and effectiveness of the operation.

In a word, the demotion and reprogramming of vehicle keys is a complicated and delicate operation, which needs to be treated with caution and followed the correct steps and methods before it can be successfully completed.