SOLVED What caused this?

[jimstevens2022]

This pcb came from a vehicle interior with the board side seen in the attachment facing downwardly with some space below it. It was installed inside the vehicle. The car is about 2 years old.

Any idea what would have caused this corrosion on the transistor leads? The unit is not working and this would appear to be the cause. I cannot tell from visual inspection if any components failed.

Appreciate all the help I can get!

 

[jimstevens2022]

Be interesting of the replacement is coated

Yes, that would be a

 

[jimstevens2022]

Followup - the dealer checked with the OEM who said they don't consider it a manufacturing defect, but would cover the cost of the part and dropped the labor charge down so the total cost to me to a little under half of what they first quoted. Thanks for the assistance!