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Hello, I'm Brandon - VW tech.
The misfire after warmed up is due to bad ignition coil. The module actually get overheated. This is a common issue we faced in the shop. You have to replace the coils with a new set.
It is highly recommend to purchase the coil from the genuine VW part.
Aftermarket coil is not suggested.
Please rate me positive for the prompt service. Thank you.