What are the penalties if I still use the expired TS16949 certification?

First, the local Quality Supervision Bureau will impose fines. You are deceiving customers and making false propaganda.

Second, if the issuing company knows about it. They will communicate with you first, if you don't pull it off yet. They will inform the Quality Supervision Bureau, but you should not tear it down. The issuing company will go through legal procedures.

Third, expired certificates are invalid. By making promotional slogans, you have already offended the issuing agency.

Your best way is to re-certify, because you have a lot of information such as quality manuals and procedure documents. Therefore, if you find another certification company for certification, you can get the certificate quickly.

The screen name is my mobile phone number. I apply for TS16949 certification here