A small transistor commonly fails when the vehicle is improperly boosted or possibly charged incorrectly.
It is a BC640 which is a TO92 case. Looking at the circuit board with the component side facing you, it is at the very left side next to a heat sink mounted 8.5 volt regulator. Exact replacements are available from any of the electronic suppliers such as Digikey, Mouser, etc.

If you are replacing electrolytic capacitors, choose high quality and go for the 105 degree C versions (as opposed to the 85 degree).

Remember if you plan on sending the cluster to a repair center as a last resort, the last thing that they want to see is a circuit board that someone has made an attempt at fixing themselves.