Look at VXDIAG VCX NANO Ford Mazda PCB Layout in detail

As titled, her’s short review on VXDIAG VCX NANO Ford Mazda 2-in-1 interface. 

under the sticker on the corners of 4 screws.

Inside:

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The ARM processor, the surface is ground, but it was possible to read this either stm32f107 or stm32f407.

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Found a joint in soldering:

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Then he fixed it and soldered the connector to the car.

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Photos credit to Mr. PavelAlexandrch.